|πŸ“πŸ—³|-FILE FORMATS-|πŸ—³πŸ“|

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-as of [18 JULY 2024]

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-TEMPLATES-

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(how udderly redundant)

(rendered “permanently retard….”)

“slow down!”

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*FILEXT*
*online file format database
*

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*CONTAINER FORMATS*

*MP4*

*M4V*

*MOV*

*MATROSKA*

*AVI*

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*EPR*

(video pre-set file)

(when exporting from ‘APP’)

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*DATA COMPRESSION*

*ZIP*

*TAR*

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*TXT*

“text files”

*document profile template*

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*RTF*
“rich text format”

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*PDF*
“portable document format”

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*CSV*
“comma separated values”

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*SRT*
(“subrip”)
(to extract ‘subtitles’ from ‘video files’ into ‘text format’)

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*clip profile template*

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*IMAGE FILES*

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*AUDIO FILES*

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*VIDEO FILES*

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*SOFTWARE FILES*

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-CONFIGURATION FILES-

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*LOOK-UP TABLES*
(‘LUT’)

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*TEMPORARY FILES*

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*HTTP COOKIES*

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.HTML

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.HAR

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*.DS_STORE*

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*.LOG FILES*

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*BACK-UP FILES* –>

.BAK

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*BLOB*
(“binary large object”)

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*APPLE SUPPORT LINK*

You can quickly get information about files, folders, or disks.

On your Mac, do any of the following:

Get individual item info:

Select the items,

then choose File > Get Info,

or press Command-I.

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A separate information window opens for each item

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Get summary info for multiple items:

Select multiple items,

press and hold the Control key,

then choose File > Get Summary Info.

A window displays a summary of information about the items

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Show the path to a file or folder:

On your Mac, click the Finder icon in the Dock to open a Finder window

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then choose

View > Show Path Bar

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The location and nested folders that contain your file or folder are displayed near the bottom of the Finder window

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Show info below icons
(Only available for Icon view)

Open a folder in the Finder or click the desktop,

choose View > Show View Options

then select β€œShow item info.”

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Item info can include

file size,

movie length,

image dimensions,

and more

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Show info in the Preview pane:

Open a folder in the Finder,

then choose View > Show Preview.

See Use the Preview pane

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*a computer file is a ‘computer resource’ for recording ‘data’ discretely in a ‘computer storage device’*

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(just as words can be written to paper, so can information be written to a ‘computer file’)

(files can be edited and transferred through the internet)

(there are different types of computer files, designed for different purposes.

(a file may be designed to store a picture, a written message, a video, a computer program, or a wide variety of other kinds of data)

(some types of files can store several types of information at once)

(by using computer programs, a person can open, read, change, save, and close a computer file)

(computer files may be reopened, modified, and copied an arbitrary number of times)

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(typically, ‘files’ are organized in a ‘file system’, which keeps track of where the files are located on disk + enables ‘user access’)

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*FILE FORMAT*

A file format is a standard way that information is encoded for storage in a computer file.

It specifies how bits are used to encode information in a digital storage medium.

File formats may be either proprietary or free and may be either unpublished or open.

Some file formats are designed for very particular types of data:

PNG files, for example, store bitmapped images using lossless data compression.

Other file formats, however, are designed for storage of several different types of data:

the Ogg format can act as a container for different types of multimedia including any combination of audio and video, with or without text (such as subtitles), and metadata.

A text file can contain any stream of characters, including possible control characters, and is encoded in one of various character encoding schemes

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Some file formats, such as

HTML,

scalable vector graphics,

and the source code of computer software

are text files with defined syntaxes that allow them to be used for specific purposes

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Specifications

File formats often have a published specification describing the encoding method and enabling testing of program intended functionality

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Not all formats have freely available specification documents,

partly because some developers view their specification documents as trade secrets,

and partly because other developers never author a formal specification document, letting precedent set by other already existing programs that use the format define the format via how these existing programs use it

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If the developer of a format doesn’t publish free specifications, another developer looking to utilize that kind of file must either

reverse engineer the file to find out how to read it

or acquire the specification document from the format’s developers for a fee and by signing a non-disclosure agreement.

The latter approach is possible only when a formal specification document exists.

Both strategies require significant time, money, or both;

therefore, file formats with publicly available specifications tend to be supported by more programs

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Patents

Patent law, rather than copyright, is more often used to protect a file format.

Although patents for file formats are not directly permitted under US law, some formats encode data using patented algorithms.

For example, using compression with the GIF file format requires the use of a patented algorithm, and though the patent owner did not initially enforce their patent, they later began collecting royalty fees.

This has resulted in a significant decrease in the use of GIFs, and is partly responsible for the development of the alternative PNG format.

However, the GIF patent expired in the US in mid-2003,

and worldwide in mid-2004

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Identifying file type

Different operating systems have traditionally taken different approaches to determining a particular file’s format, with each approach having its own advantages and disadvantages.

Most modern operating systems and individual applications need to use all of the following approaches to read “foreign” file formats, if not work with them completely

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Filename extension

One popular method used by many operating systems, including

Windows,

macOS,

CP/M,

DOS,

VMS

and VM/CMS

is to determine the format of a file based on the end of its name,

more specifically the letters following the final period.

This portion of the filename is known as the filename extension.

For example,

HTML documents are identified by names that end with .html (or .htm),

GIF images by .gif.

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In the original FAT file system, file names were limited to an eight-character identifier and a three-character extension, known as an 8.3 filename.

There are only so many three-letter extensions, so, often any given extension might be linked to more than one program.

Many formats still use three-character extensions even though modern operating systems and application programs no longer have this limitation.

Since there is no standard list of extensions, more than one format can use the same extension, which can confuse both the operating system and users.

One artifact of this approach is that the system can easily be tricked into treating a file as a different format simply by renaming itβ€”

an HTML file can, for instance, be easily treated as plain text by renaming it from filename.html to filename.txt.

Although this strategy was useful to expert users who could easily understand and manipulate this information, it was often confusing to less technical users, who could accidentally make a file unusable (or “lose” it) by renaming it incorrectly.

This led more recent operating system shells, such as Windows 95 and Mac OS X, to hide the extension when listing files.

This prevents the user from accidentally changing the file type,

and allows expert users to turn this feature off and display the extensions.

Hiding the extension, however, can create the appearance of two or more identical filenames in the same folder.

For example, a company logo may be needed both in

.eps format
(for publishing)

and .png format
(for web sites).

With the extensions visible, these would appear as the unique filenames:

“CompanyLogo.eps”

and “CompanyLogo.png”.

On the other hand, hiding the extensions would make both appear as “CompanyLogo”, which can lead to confusion.

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Hiding extensions can also pose a security risk

For example, a malicious user could create an executable program with an innocent name such as “Holiday photo.jpg.exe”.

The “.exe” would be hidden and an unsuspecting user would see “Holiday photo.jpg”, which would appear to be a JPEG image, usually unable to harm the machine.

However, the operating system would still see the “.exe” extension and run the program, which would then be able to cause harm to the computer.

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The same is true with files with only one extension:

as it is not shown to the user, no information about the file can be deduced without explicitly investigating the file

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To further trick users, it is possible to store an icon inside the program, in which case some operating systems’ icon assignment for the executable file (.exe) would be overridden with an icon commonly used to represent JPEG images, making the program look like an image.

Extensions can also be spoofed: some Microsoft Word macro viruses create a Word file in template format and save it with a .doc extension.

Since Word generally ignores extensions and looks at the format of the file, these would open as templates, execute, and spread the virus.[citation needed]

These issues require users with extensions hidden to be vigilant and never let the operating system choose with what program to open a file not known to be trustworthy

(which contradicts the idea of making things easier for the user).

This represents a practical problem for Windows systems where extension-hiding is turned on by default

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Internal metadata

A second way to identify a file format is to use information regarding the format stored inside the file itself,

either information meant for this purpose

or binary strings that happen to always be in specific locations in files of some formats.

Since the easiest place to locate them is at the beginning, such area is usually called a file header when it is greater than a few bytes,

or a magic number if it is just a few bytes long.

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The metadata contained in a file header are usually stored at the start of the file, but might be present in other areas too, often including the end, depending on the file format or the type of data contained.

Character-based (text) files usually have character-based headers, whereas binary formats usually have binary headers, although this is not a rule.

Text-based file headers usually take up more space, but being human-readable, they can easily be examined by using simple software such as a text editor or a hexadecimal editor.

As well as identifying the file format, file headers may contain metadata about the file and its contents

.

For example, most image files store information about

image format,

size,

resolution

and color space,

and optionally authoring information such as

who made the image,

when and where it was made,

what camera model and photographic settings were used (Exif), and so on

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Such metadata may be used by software reading or interpreting the file during the loading process and afterwards.

File headers may be used by an operating system to quickly gather information about a file without loading it all into memory, but doing so uses more of a computer’s resources than reading directly from the directory information.

For instance, when a graphic file manager has to display the contents of a folder, it must read the headers of many files before it can display the appropriate icons, but these will be located in different places on the storage medium thus taking longer to access.

A folder containing many files with complex metadata such as thumbnail information may require considerable time before it can be displayed.

If a header is binary hard-coded such that the header itself needs complex interpretation in order to be recognized, especially for metadata content protection’s sake, there is a risk that the file format can be misinterpreted.

It may even have been badly written at the source.

This can result in corrupt metadata which, in extremely bad cases, might even render the file unreadable.

[clarification needed]

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A more complex example of file headers are those used for wrapper (or container) file formats

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Magic number

One way to incorporate file type metadata, often associated with Unix and its derivatives, is just to store a “magic number” inside the file itself.

Originally, this term was used for a specific set of 2-byte identifiers at the beginnings of files, but since any binary sequence can be regarded as a number, any feature of a file format which uniquely distinguishes it can be used for identification.

GIF images, for instance, always begin with the ASCII representation of either GIF87a or GIF89a, depending upon the standard to which they adhere.

Many file types, especially plain-text files, are harder to spot by this method.

HTML files, for example, might begin with the string (which is not case sensitive), or an appropriate document type definition that starts with , or, for XHTML, the XML identifier, which begins with <?xml.

The files can also begin with

HTML comments,

random text,

or several empty lines,

(but still be usable HTML)

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The ‘magic number approach’ offers better guarantees that the format will be identified correctly, and can often determine more precise information about the file.

Since reasonably reliable “magic number” tests can be fairly complex, and each file must effectively be tested against every possibility in the magic database, this approach is relatively inefficient, especially for displaying large lists of files

(in contrast, file name and metadata-based methods need to check only one piece of data, and match it against a sorted index).

Also, data must be read from the file itself, increasing ‘latency’ as opposed to metadata stored in the directory.

Where file types don’t lend themselves to recognition in this way, the system must fall back to metadata.

It is, however, the best way for a program to check if the file it has been told to process is of the correct format:

while the file’s name or metadata may be altered independently of its content, failing a well-designed magic number test is a pretty sure sign that the file is either corrupt or of the wrong type.

On the other hand, a valid magic number does not guarantee that the file is not corrupt or is of a correct type.

So-called ‘shebang lines’ in script files are a special case of magic numbers.

Here, the magic number is human-readable text that identifies a specific command interpreter and options to be passed to the command interpreter.

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Another operating system using magic numbers is AmigaOS, where magic numbers were called “Magic Cookies” and were adopted as a standard system to recognize executables in Hunk executable file format and also to let single programs, tools and utilities deal automatically with their saved data files, or any other kind of file types when saving and loading data.

This system was then enhanced with the Amiga standard Datatype recognition system.

Another method was the FourCC method, originating in OSType on Macintosh, later adapted by Interchange File Format (IFF) and derivatives.

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External metadata

A final way of storing the format of a file is to explicitly store information about the format in the file system, rather than within the file itself.

This approach keeps the metadata separate from both the main data and the name, but is also less portable than either filename extensions or “magic numbers”, since the format has to be converted from filesystem to filesystem.

While this is also true to an extent with filename extensionsβ€”for instance, for compatibility with MS-DOS’s three character limitβ€”most forms of storage have a roughly equivalent definition of a file’s data and name, but may have varying or no representation of further metadata.

Note that zip files or archive files solve the problem of handling metadata.

A utility program collects multiple files together along with metadata about each file and the folders/directories they came from all within one new file (e.g. a zip file with extension .zip).

The new file is also compressed and possibly encrypted, but now is transmissible as a single file across operating systems by FTP systems or attached to email.

At the destination, it must be unzipped by a compatible utility to be useful, but the problems of transmission are solved this way

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Mac OS type-codes

The Mac OS’ Hierarchical File System stores codes for creator and type as part of the directory entry for each file.

These codes are referred to as OSTypes.

These codes could be any 4-byte sequence, but were often selected so that the ASCII representation formed a sequence of meaningful characters, such as an abbreviation of the application’s name or the developer’s initials.

For instance a HyperCard “stack” file has a creator of WILD (from Hypercard’s previous name, “WildCard”) and a type of STAK.

The BBEdit text editor has a creator code of R*ch referring to its original programmer, Rich Siegel.

The type code specifies the format of the file, while the creator code specifies the default program to open it with when double-clicked by the user.

For example, the user could have several text files all with the type code of TEXT, but which each open in a different program, due to having differing creator codes.

This feature was intended so that, for example,

‘human-readable plain-text files’ could be opened in a ‘general purpose text editor’, while ‘programming/HTML code files’ would open in a specialized editor or IDE.

However, this feature was often the source of user confusion, as which program would launch when the files were double-clicked was often unpredictable.

RISC OS uses a similar system, consisting of a 12-bit number which can be looked up in a table of descriptionsβ€”

e.g. the hexadecimal number FF5 is “aliased” to PoScript, representing a PostScript file.

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Mac OS X uniform type identifiers (UTIs)

A Uniform Type Identifier (UTI) is a method used in macOS for uniquely identifying “typed” classes of entity, such as file formats.

It was developed by Apple as a replacement for OSType (type & creator codes).

The UTI is a Core Foundation string, which uses a reverse-DNS string.

Some common and standard types use a domain called public

(e.g. public.png for a Portable Network Graphics image),

while other domains can be used for third-party types

(e.g. com.adobe.pdf for Portable Document Format).

UTIs can be defined within a hierarchical structure, known as a ‘conformance hierarchy’.

Thus, public.png conforms to a supertype of public.image, which itself conforms to a supertype of public.data.

A UTI can exist in multiple hierarchies, which provides great flexibility

.

In addition to file formats, UTIs can also be used for other entities which can exist in macOS, including…

Pasteboard data

Folders (directories)

Translatable types (as handled by the Translation Manager)

Bundles

Frameworks

Streaming data

Aliases and symlinks

OS/2 extended attributes

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The HPFS, FAT12 and FAT16 (but not FAT32) filesystems allow the storage of “extended attributes” with files.

These comprise an arbitrary set of triplets with a name, a coded type for the value and a value, where the names are unique and values can be up to 64 KB long.

There are standardized meanings for certain types and names (under OS/2).

One such is that the “.TYPE” extended attribute is used to determine the file type.

Its value comprises a list of one or more file types associated with the file, each of which is a string, such as “Plain Text” or “HTML document”.

Thus a file may have several types.

The NTFS filesystem also allows storage of OS/2 extended attributes, as one of the file forks, but this feature is merely present to support the OS/2 subsystem (not present in XP), so the Win32 subsystem treats this information as an opaque block of data and does not use it.

Instead, it relies on other file forks to store meta-information in Win32-specific formats.

OS/2 extended attributes can still be read and written by Win32 programs, but the data must be entirely parsed by applications.

POSIX extended attributes[edit]
On Unix and Unix-like systems, the ext2, ext3, ReiserFS version 3, XFS, JFS, FFS, and HFS+ filesystems allow the storage of extended attributes with files.

These include an arbitrary list of “name=value” strings, where the names are unique and a value can be accessed through its related name

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PRONOM unique identifiers
(PUIDs)

The PRONOM Persistent Unique Identifier (PUID) is an extensible scheme of persistent, unique and unambiguous identifiers for file formats, which has been developed by The National Archives of the UK as part of its PRONOM technical registry service.

PUIDs can be expressed as Uniform Resource Identifiers using the info:pronom/ namespace. Although not yet widely used outside of UK government and some digital preservation programmes, the PUID scheme does provide greater granularity than most alternative schemes.

MIME types[edit]
MIME types are widely used in many Internet-related applications, and increasingly elsewhere, although their usage for on-disc type information is rare. These consist of a standardised system of identifiers (managed by IANA) consisting of a type and a sub-type, separated by a slashβ€”for instance, text/html or image/gif. These were originally intended as a way of identifying what type of file was attached to an e-mail, independent of the source and target operating systems. MIME types identify files on BeOS, AmigaOS 4.0 and MorphOS, as well as store unique application signatures for application launching. In AmigaOS and MorphOS the Mime type system works in parallel with Amiga specific Datatype system.

There are problems with the MIME types though; several organisations and people have created their own MIME types without registering them properly with IANA, which makes the use of this standard awkward in some cases.

File format identifiers (FFIDs)[edit]
File format identifiers is another, not widely used way to identify file formats according to their origin and their file category. It was created for the Description Explorer suite of software. It is composed of several digits of the form NNNNNNNNN-XX-YYYYYYY. The first part indicates the organisation origin/maintainer (this number represents a value in a company/standards organisation database), the 2 following digits categorize the type of file in hexadecimal. The final part is composed of the usual filename extension of the file or the international standard number of the file, padded left with zeros. For example, the PNG file specification has the FFID of 000000001-31-0015948 where 31 indicates an image file, 0015948 is the standard number and 000000001 indicates the International Organization for Standardization (ISO).

File content based format identification[edit]
Another but less popular way to identify the file format is to examine the file contents for distinguishable patterns among file types. The contents of a file are a sequence of bytes and a byte has 256 unique permutations (0–255). Thus, counting the occurrence of byte patterns that is often referred as byte frequency distribution gives distinguishable patterns to identify file types. There are many content-based file type identification schemes that use byte frequency distribution to build the representative models for file type and use any statistical and data mining techniques to identify file types [2]

File structure[edit]
There are several types of ways to structure data in a file. The most usual ones are described below.

Unstructured formats (raw memory dumps)[edit]
Earlier file formats used raw data formats that consisted of directly dumping the memory images of one or more structures into the file.

This has several drawbacks. Unless the memory images also have reserved spaces for future extensions, extending and improving this type of structured file is very difficult. It also creates files that might be specific to one platform or programming language (for example a structure containing a Pascal string is not recognized as such in C). On the other hand, developing tools for reading and writing these types of files is very simple.

The limitations of the unstructured formats led to the development of other types of file formats that could be easily extended and be backward compatible at the same time.

Chunk-based formats[edit]
In this kind of file structure, each piece of data is embedded in a container that somehow identifies the data. The container’s scope can be identified by start- and end-markers of some kind, by an explicit length field somewhere, or by fixed requirements of the file format’s definition.

Throughout the 1970s, many programs used formats of this general kind. For example, word-processors such as troff, Script, and Scribe, and database export files such as CSV. Electronic Arts and Commodore-Amiga also used this type of file format in 1985, with their IFF (Interchange File Format) file format.

A container is sometimes called a “chunk”, although “chunk” may also imply that each piece is small, and/or that chunks do not contain other chunks; many formats do not impose those requirements.

The information that identifies a particular “chunk” may be called many different things, often terms including “field name”, “identifier”, “label”, or “tag”. The identifiers are often human-readable, and classify parts of the data: for example, as a “surname”, “address”, “rectangle”, “font name”, etc. These are not the same thing as identifiers in the sense of a database key or serial number (although an identifier may well identify its associated data as such a key).

With this type of file structure, tools that do not know certain chunk identifiers simply skip those that they do not understand. Depending on the actual meaning of the skipped data, this may or may not be useful (CSS explicitly defines such behavior).

This concept has been used again and again by RIFF (Microsoft-IBM equivalent of IFF), PNG, JPEG storage, DER (Distinguished Encoding Rules) encoded streams and files (which were originally described in CCITT X.409:1984 and therefore predate IFF), and Structured Data Exchange Format (SDXF).

Indeed, any data format must somehow identify the significance of its component parts, and embedded boundary-markers are an obvious way to do so:

MIME headers do this with a colon-separated label at the start of each logical line. MIME headers cannot contain other MIME headers, though the data content of some headers has sub-parts that can be extracted by other conventions.
CSV and similar files often do this using a header records with field names, and with commas to mark the field boundaries. Like MIME, CSV has no provision for structures with more than one level.
XML and its kin can be loosely considered a kind of chunk-based format, since data elements are identified by markup that is akin to chunk identifiers. However, it has formal advantages such as schemas and validation, as well as the ability to represent more complex structures such as trees, DAGs, and charts. If XML is considered a “chunk” format, then SGML and its predecessor IBM GML are among the earliest examples of such formats.
JSON is similar to XML without schemas, cross-references, or a definition for the meaning of repeated field-names, and is often convenient for programmers.
YAML is similar to JSON, but use indentation to separate data chunks and aim to be more human-readable than JSON or XML.
Protocol Buffers are in turn similar to JSON, notably replacing boundary-markers in the data with field numbers, which are mapped to/from names by some external mechanism.
Directory-based formats[edit]
This is another extensible format, that closely resembles a file system (OLE Documents are actual filesystems), where the file is composed of ‘directory entries’ that contain the location of the data within the file itself as well as its signatures (and in certain cases its type).

Good examples of these types of file structures are disk images, OLE documents TIFF, libraries. ODT and DOCX, being PKZIP-based are chunked and also carry a directory.

See also[edit]

Audio file format

Chemical file format

Comparison of executable file formats

Digital container format

Document file format

DROID file format identification utility

File (command), a file type identification utility

File conversion

Future proofing

Graphics file format summary

Image file formats

List of archive formats

List of file formats

List of file signatures, or “magic numbers”

List of filename extensions (alphabetical)

List of free file formats

List of motion and gesture file formats

Magic number (programming)

Object file

Video file format

Windows file types

References[edit]

^ PC World (23 December 2003). “Windows Tips: For Security Reasons, It Pays To Know Your File Extensions”. Archived from the original on 23 April 2008. Retrieved 20 June 2008.

^ “File Format Identification”. Archived from the original on 2009-08-14. Retrieved 2009-07-21.

“Extended Attribute Data Types”. REXX Tips & Tricks, Version 2.80. Archived from the original on December 25, 2004. Retrieved February 9, 2005.

“Extended Attributes used by the WPS”. REXX Tips & Tricks, Version 2.80. Archived from the original on March 21, 2005. Retrieved February 9, 2005.

“Extended Attributes – what are they and how can you use them ?”. Roger Orr. Retrieved February 9, 2005.

External links[edit]

Look up file format in Wiktionary, the free dictionary.

File format at Curlie

Best Practices for File Formats, US: Stanford University Libraries, Data Management Services

(“The file formats you use have a direct impact on your ability to open those files at a later date and on the ability of other people to access those data”)

en.wikipedia.org /wiki/File_format
File format
Contributors to Wikimedia projects
25-32 minutes

.

.

*FILE FORMATS*
(wiki-list)

This is a list of file formats used by computers, organized by type.

Filename extensions are usually noted in parentheses if they differ from the file format name or abbreviation. Many operating systems do not limit filenames to one extension shorter than 4 characters, as was common with some operating systems that supported the File Allocation Table (FAT) file system. Examples of operating systems that do not impose this limit include Unix-like systems, and Microsoft Windows NT, 95, 98, and ME which have no three character limit on extensions for 32-bit or 64-bit applications on file systems other than pre-Windows 95 and Windows NT 3.5 versions of the FAT file system. Some filenames are given extensions longer than three characters. While MS-DOS and NT always see the final period in a filename as an extension, in UNIX-like systems, the final period doesn’t necessarily mean the text no afterward is the extension.[1]

en.wikipedia.org /wiki/List_of_file_formats
List of file formats
Contributors to Wikimedia projects
80-102 minutes

Some file formats, such as .txt or .text, may be listed multiple times.

Archive and compressed[edit]

.?mn – is a custom file made by Team Gastereler for making it easy to open .arc files for Nintendo which can be opened on PC by these files. These types of files are not available anywhere, as they haven’t been released yet.

.?Q? – files that are compressed, often by the SQ program.

7z – 7-Zip compressed file

AAPKG – ArchestrA IDE

.

*AAC* –>

“Advanced Audio Coding”

.

ace – ACE compressed file

ALZ – ALZip compressed file

APK – Android package: Applications installable on Android; package format of the Alpine Linux distribution

APPX – Microsoft Application Package (.appx)

AT3 – Sony’s UMD data compression

.bke – BackupEarth.com data compression

ARC – pre-Zip data compression

ARC – Nintendo U8 Archive (mostly Yaz0 compressed)

ARJ – ARJ compressed file

ASS (also SAS) – a subtitles file created by Aegisub, a video typesetting application (also a Halo game engine file)

B – (B file) Similar to .a, but less compressed.

BA – Scifer Archive (.ba), Scifer External Archive Type

big – Special file compression format used by Electronic Arts to compress the data for many of EA’s games

BIN – compressed archive, can be read and used by CD-ROMs and Java, extractable by 7-zip and WINRAR

bjsn – Used to store The Escapists saves on Android.

BKF (.bkf) – Microsoft backup created by NTBackup.c

bzip2 (.bz2) –

bld – Skyscraper Simulator Building

cab – A cabinet (.cab) file is a library of compressed files stored as one file. Cabinet files are used to organize installation files that are copied to the user’s system.[2]

c4 – JEDMICS image files, a DOD system

cals – JEDMICS image files, a DOD system

xaml – Used in programs like Visual Studio to create exe files.

CLIPFLAIR (.clipflair, .clipflair.zip) – ClipFlair Studio ClipFlair component saved state file (contains component options in XML, extra/attached files and nested components’ state in child .clipflair.zip files – activities are also components and can be nested at any depth)

CPT, SEA – Compact Pro (Macintosh)

DAA – Closed-format, Windows-only compressed disk image

deb – Debian install package

DMG – an Apple compressed/encrypted format

DDZ – a file which can only be used by the “daydreamer engine” created by “fever-dreamer”, a program similar to RAGS, it’s mainly used to make somewhat short games.

DN – Adobe Dimension CC file format

DPE – Package of AVE documents made with Aquafadas digital publishing tools.

.egg – Alzip Egg Edition compressed file

EGT (.egt) – EGT Universal Document also used to create compressed cabinet files replaces .ecab

ECAB (.ECAB, .ezip) – EGT Compressed Folder used in advanced systems to compress entire system folders, replaced by EGT Universal Document

ESD – Electronic Software Distribution, a compressed and encrypted WIM File

ESS (.ess) – EGT SmartSense File, detects files compressed using the EGT compression system.

EXE (.exe) – Windows application

Flipchart file (.flipchart) – Used in Promethean ActivInspire Flipchart Software.

GBP – GBP File Extension – What is a .gbp file and how do I open it? 2 types of files: 1. An archive index file that is created by Genie Timeline [2]. It contains references to the files that the user has chosen to backup; the references can be to an archive file or a batch of files. This files can be opened using Genie-Soft Genie Timeline on Windows. 2. A data output file created by CAD Printed Circuit Board (PCB). This type of file can be opened on Windows using Autodesk EAGLE EAGLE | PCB Design Software | Autodesk, Altium Designer [3], Viewplot Welcome to Viewplot.com …For PCB Related Software;…Viewplot The Gerber Viewer & editor in one……PCB Elegance a professional layout package for a affordable price, Gerbv gerbv – A Free/Open Source Gerber Viewer on Mac using Autodesk EAGLE, Gerbv, gEDA gplEDA Homepage and on Linux using Autodesk EAGLE, gEDA, Gerbv

GBS (.gbs, .ggp, .gsc) – OtterUI binary scene file

GHO (.gho, .ghs) – Norton Ghost

GIF (.gif) – Graphics Interchange Format

gzip (.gz) – Compressed file

HTML (.html) HTML code file

IPG (.ipg) – Format in which Apple Inc. packages their iPod games. can be extracted through Winrar

jar – ZIP file with manifest for use with Java applications.

LBR (.Lawrence) – Lawrence Compiler Type file

LBR – Library file

LQR – LBR Library file compressed by the SQ program.

LHA (.lzh) – Lempel, Ziv, Huffman

lzip (.lz) – Compressed file

lzo

lzma – Lempel–Ziv–Markov chain algorithm compressed file

LZX

MBW (.mbw) – MBRWizard archive

MHTML – Mime HTML (Hyper-Text Markup Language) code file

MPQ Archives (.mpq) – Used by Blizzard Entertainment

BIN (.bin) – MacBinary

NL2PKG – NoLimits 2 Package (.nl2pkg)

NTH (.nth) – Nokia Theme Used by Nokia Series 40 Cellphones

OAR (.oar) – OAR archive

OSK – Compressed osu! skin archive

OSR – Compressed osu! replay archive

OSZ – Compressed osu! beatmap archive

PAK – Enhanced type of .ARC archive

PAR (.par, .par2) – Parchive

PAF (.paf) – Portable Application File

PEA (.pea) – PeaZip archive file

PHP (.php) – PHP code file

PYK (.pyk) – Compressed file

PK3 (.pk3) – Quake 3 archive (See note on DoomΒ³)

PK4 (.pk4) – DoomΒ³ archive (Opens similarly to a zip archive.)

py / pyw – Python code file

RAR (.rar) – Rar Archive, for multiple file archive (rar to .r01-.r99 to s01 and so on)

RAG, RAGS – Game file, a game playable in the RAGS game-engine, a free program which both allows people to create games, and play games, games created have the format “RAG game file”

RaX – Archive file created by RaX

rblx(.rblx) – roblox studio file

RPM – Red Hat package/installer for Fedora, RHEL, and similar systems.

sb – Scratch file

sb2 – Scratch 2.0 file

sb3 – Scratch 3.0 file

SEN – Scifer Archive (.sen) – Scifer Internal Archive Type

SIT (.sitx) – StuffIt (Macintosh)

SIS/SISX – Symbian Application Package

SKB – Google SketchUp backup File

SQ (.sq) – Squish Compressed Archive

SWM – Splitted WIM File, usually found on OEM Recovery Partition to store preinstalled Windows image, and to make Recovery backup (to USB Drive) easier (due to FAT32 limitations)

SZS – Nintendo Yaz0 Compressed Archive

.

TB (.tb) – Tabbery Virtual Desktop Tab file

TIB (.tib) – Acronis True Image backup

UHA – Ultra High Archive Compression

UUE (.uue) – unified utility engine – the generic and default format for all things UUe-related.

VIV – Archive format used to compress data for several video games, including Need For Speed: High Stakes.

VOL – video game data package.

VSA – Altiris Virtual Software Archive

WAX – Wavexpress – A ZIP alternative optimized for packages containing video, allowing multiple packaged files to be all-or-none delivered with near-instantaneous unpacking via NTFS file system manipulation.

WIM – A compressed disk image for installing Windows Vista or higher, Windows Fundamentals for Legacy PC, or restoring a system image made from Backup and Restore (Windows Vista/7)

XAP – Windows Phone Application Package

xz – xz compressed files, based on LZMA/LZMA2 algorithm

Z – Unix compress file

zoo – based on LZW

zip – popular compression format

Physical recordable media archiving[edit]

ISO – The generic format for most optical media, including CD-ROM, DVD-ROM, Blu-ray Disc, HD DVD and UMD.

NRG – The proprietary optical media archive format used by Nero applications.

IMG – For archiving DOS formatted floppy disks, larger optical media, and hard disk drives.

ADF – Amiga Disk Format, for archiving Amiga floppy disks

ADZ – The GZip-compressed version of ADF.

DMS – Disk Masher System, a disk-archiving system native to the Amiga.

DSK – For archiving floppy disks from a number of other platforms, including the ZX Spectrum and Amstrad CPC.

D64 – An archive of a Commodore 64 floppy disk.

SDI – System Deployment Image, used for archiving and providing “virtual disk” functionality.

MDS – DAEMON tools native disc image format used for making images from optical CD-ROM, DVD-ROM, HD DVD or Blu-ray Disc. It comes together with MDF file and can be mounted with DAEMON Tools.

MDX – New DAEMON Tools format that allows getting one MDX disc image file instead of two (MDF and MDS).

DMG – Macintosh disk image files

(MPEG-1 is found in a .DAT file on a video CD.)

CDI – DiscJuggler image file

CUE – CDRWrite CUE image file

CIF – Easy CD Creator .cif format

C2D – Roxio-WinOnCD .c2d format

DAA – PowerISO .daa format

B6T – BlindWrite 5/6 image file

Computer-aided design[edit]

Computer-aided is a prefix for several categories of tools (e.g., design, manufacture, engineering) which assist professionals in their respective fields (e.g., machining, architecture, schematics).

Computer-aided design (CAD)[edit]
Computer-aided design (CAD) software assists engineers, architects and other design professionals in project design.

3DXML – Dassault Systemes graphic representation

3MF – Microsoft 3D Manufacturing Format[3]

ACP – VA Software VA – Virtual Architecture CAD file

AMF – Additive Manufacturing File Format

AEC – DataCAD drawing format[4]

AR – Ashlar-Vellum Argon – 3D Modeling

ART – ArtCAM model

ASC – BRL-CAD Geometry File (old ASCII format)

ASM – Solidedge Assembly, Pro/ENGINEER Assembly

BIN, BIM – Data Design System DDS-CAD

BREP – Open CASCADE 3D model (shape)

C3D – C3D Toolkit File Format

CCC – CopyCAD Curves

CCM – CopyCAD Model

CCS – CopyCAD Session

CAD – CadStd

CATDrawing – CATIA V5 Drawing document

CATPart – CATIA V5 Part document

CATProduct – CATIA V5 Assembly document

CATProcess – CATIA V5 Manufacturing document

cgr – CATIA V5 graphic representation file

ckd – KeyCreator CAD Modeling

ckt – KeyCreator CAD Modeling

CO – Ashlar-Vellum Cobalt – parametric drafting and 3D modeling

DRW – Caddie Early version of Caddie drawing – Prior to Caddie changing to DWG

DFT – Solidedge Draft

DGN – MicroStation design file

DGK – Delcam Geometry

DMT – Delcam Machining Triangles

DXF – ASCII Drawing Interchange file format, AutoCAD

DWB – VariCAD drawing file

DWF – Autodesk’s Web Design Format; AutoCAD & Revit can publish to this format; similar in concept to PDF files; Autodesk Design Review is the reader

DWG – Popular file format for Computer Aided Drafting applications, notably AutoCAD, Open Design Alliance applications, and Autodesk Inventor Drawing files

EASM – SolidWorks eDrawings assembly file

EDRW – eDrawings drawing file

EMB – Wilcom ES Designer Embroidery CAD file

EPRT – eDrawings part file

EscPcb – “esCAD pcb” data file by Electro-System (Japan)

EscSch – “esCAD sch” data file by Electro-System (Japan)

ESW – AGTEK format

EXCELLON – Excellon file

EXP – Drawing Express format

F3D – Autodesk Fusion 360 archive file[5]

FCStd – Native file format of FreeCAD CAD/CAM package

FM – FeatureCAM Part File

FMZ – FormZ Project file

G – BRL-CAD Geometry File

GBR – Gerber file

GLM – KernelCAD model

GRB – T-FLEX CAD File

GTC – GRAITEC Advance format

IAM – Autodesk Inventor Assembly file

ICD – IronCAD 2D CAD file

IDW – Autodesk Inventor Drawing file

IFC – buildingSMART for sharing AEC and FM data

IGES – Initial Graphics Exchange Specification

Intergraph Standard File Formats – Intergraph

IO – Stud.io 3d model

IPN – Autodesk Inventor Presentation file

IPT – Autodesk Inventor Part file

JT – Jupiter Tesselation

MCD – Monu-CAD (Monument/Headstone Drawing file)

MDG – Model of Digital Geometric Kernel

model – CATIA V4 part document

OCD – Orienteering Computer Aided Design (OCAD) file

PAR – Solidedge Part

PIPE – PIPE-FLO Professional Piping system design file

PLN – ArchiCad project

PRT – NX (recently known as Unigraphics), Pro/ENGINEER Part, CADKEY Part

PSM – Solidedge Sheet

PSMODEL – PowerSHAPE Model

PWI – PowerINSPECT File

PYT – Pythagoras File

SKP – SketchUp Model

RLF – ArtCAM Relief

RVM – AVEVA PDMS 3D Review model

RVT – Autodesk Revit project files

RFA – Autodesk Revit family files

S12 – Spirit file, by Softtech

SCAD – OpenSCAD 3D part model

SCDOC – SpaceClaim 3D Part/Assembly

SLDASM – SolidWorks Assembly drawing

SLDDRW – SolidWorks 2D drawing

SLDPRT – SolidWorks 3D part model

dotXSI – For Softimage

STEP – Standard for the Exchange of Product model data

STL – Stereo Lithographic data format used by various CAD systems and stereo lithographic printing machines.

STD – Power Vision Plus – Electricity Meter Data (Circutor)

TCT – TurboCAD drawing template

TCW – TurboCAD for Windows 2D and 3D drawing

UNV – I-DEAS I-DEAS (Integrated Design and Engineering Analysis Software)

VC6 – Ashlar-Vellum Graphite – 2D and 3D drafting

VLM – Ashlar-Vellum Vellum, Vellum 2D, Vellum Draft, Vellum 3D, DrawingBoard

VS – Ashlar-Vellum Vellum Solids

WRL – Similar to STL, but includes color. Used by various CAD systems and 3D printing rapid prototyping machines. Also used for VRML models on the web.

X_B – Parasolids binary format

X_T – Parasolids

XE – Ashlar-Vellum Xenon – for associative 3D modeling

ZOFZPROJ – ZofzPCB 3D PCB model, containing mesh, netlist and BOM

Electronic design automation (EDA)[edit]

Electronic design automation (EDA), or electronic computer-aided design (ECAD), is specific to the field of electrical engineering.

BRD – Board file for EAGLE Layout Editor, a commercial PCB design tool

BSDL – Description language for testing through JTAG

CDL – Transistor-level netlist format for IC design

CPF – Power-domain specification in system-on-a-chip (SoC) implementation (see also UPF)

DEF – Gate-level layout

DSPF – Detailed Standard Parasitic Format, Analog-level parasitics of interconnections in IC design

EDIF – Vendor neutral gate-level netlist format

FSDB – Analog waveform format (see also Waveform viewer)

GDSII – Format for PCB and layout of integrated circuits

HEX – ASCII-coded binary format for memory dumps

LEF – Library Exchange Format, physical abstract of cells for IC design

LIB – Library modeling (function, timing) format

MS12 – NI Multisim file

OASIS – Open Artwork System Interchange Standard

OpenAccess – Design database format with APIs

PSF – Cadence proprietary format to store simulation results/waveforms (2GB limit)

PSFXL – Cadence proprietary format to store simulation results/waveforms

SDC – Synopsys Design Constraints, format for synthesis constraints

SDF – Standard for gate-level timings

SPEF – Standard format for parasitics of interconnections in IC design

SPI, CIR – SPICE Netlist, device-level netlist and commands for simulation

SREC, S19 – S-record, ASCII-coded format for memory dumps

SST2 – Cadence proprietary format to store mixed-signal simulation results/waveforms

STIL – Standard Test Interface Language, IEEE1450-1999 standard for Test Patterns for IC

SV – SystemVerilog source file

S*P – Touchstone/EEsof Scattering parameter data file – multi-port blackbox performance, measurement or simulated

TLF – Contains timing and logical information about a collection of cells (circuit elements)

UPF – Standard for Power-domain specification in SoC implementation

V – Verilog source file

VCD – Standard format for digital simulation waveform

VHD, VHDL – VHDL source file

WGL – Waveform Generation Language, format for Test Patterns for IC

Test technology[edit]

Files output from Automatic Test Equipment or post-processed from such.

Standard Test Data Format

Database[edit]

4DB – 4D database Structure file

4DD – 4D database Data file

4DIndy – 4D database Structure Index file

4DIndx – 4D database Data Index file

4DR – 4D database Data resource file (in old 4D versions)

ACCDB – Microsoft Database (Microsoft Office Access 2007 and later)

ACCDE – Compiled Microsoft Database (Microsoft Office Access 2007 and later)

ADT – Sybase Advantage Database Server (ADS)

APR – Lotus Approach data entry & reports

BOX – Lotus Notes Post Office mail routing database

CHML – Krasbit Technologies Encrypted database file for 1 click integration between contact management software and the chameleon(tm) line of imaging workflow solutions

DAF – Digital Anchor data file

DAT – DOS Basic

DAT – Intersystems CachΓ© database file

DB – Paradox

DB – SQLite

DBF – db/dbase II,III,IV and V, Clipper, Harbour/xHarbour, Fox/FoxPro, Oracle

DTA – Sage Sterling database file

EGT – EGT Universal Document, used to compress sql databases to smaller files, may contain original EGT database style.

ESS – EGT SmartSense is a database of files and its compression style. Specific to EGT SmartSense

EAP – Enterprise Architect Project

FDB – Firebird Databases

FDB – Navision database file

FP, FP3, FP5, and FP7 – FileMaker Pro

FRM – MySQL table definition

GDB – Borland InterBase Databases

GTABLE – Google Drive Fusion Table

KEXI – Kexi database file (SQLite-based)

KEXIC – shortcut to a database connection for a Kexi databases on a server

KEXIS – shortcut to a Kexi database

LDB – Temporary database file, only existing when database is open

LIRS – Layered Intager Storage. Stores intageres with characters such as semicolons to create lists of data.

MDA – Add-in file for Microsoft Access

MDB – Microsoft Access database

ADP – Microsoft Access project (used for accessing databases on a server)

MDE – Compiled Microsoft Database (Access)

MDF – Microsoft SQL Server Database

MYD – MySQL MyISAM table data

MYI – MySQL MyISAM table index

NCF – Lotus Notes configuration file

NSF – Lotus Notes database

NTF – Lotus Notes database design template

NV2 – QW Page NewViews object oriented accounting database

ODB – LibreOffice Base or OpenOffice Base database

ORA – Oracle tablespace files sometimes get this extension (also used for configuration files)

PCONTACT – WinIM Contact file

PDB – Palm OS Database

PDI – Portable Database Image

PDX – Corel Paradox database management

PRC – Palm OS resource database

SQL – bundled SQL queries

REC – GNU recutils database

REL – Sage Retrieve 4GL data file

RIN – Sage Retrieve 4GL index file

SDB – StarOffice’s StarBase

SDF – SQL Compact Database file

sqlite – SQLite

UDL – Universal Data Link

waData – Wakanda (software) database Data file

waIndx – Wakanda (software) database Index file

waModel – Wakanda (software) database Model file

waJournal – Wakanda (software) database Journal file

WDB – Microsoft Works Database

WMDB – Windows Media Database file – The CurrentDatabase_360.wmdb file can contain file name, file properties, music, video, photo and playlist information.

Desktop publishing[edit]

AI – Adobe Illustrator

AVE / ZAVE – Aquafadas

CDR – CorelDRAW

CHP / pub / STY / CAP / CIF / VGR / FRM – Ventura Publisher – Xerox (DOS / GEM)

CPT – Corel Photo-Paint

DTP – Greenstreet Publisher, GST PressWorks

FM – Adobe FrameMaker

GDRAW – Google Drive Drawing

ILDOC – Broadvision Quicksilver document

INDD – Adobe InDesign

MCF – FotoInsight Designer

PDF – Adobe Acrobat or Adobe Reader

PMD – Adobe PageMaker

PPP – Serif PagePlus

PSD – Adobe Photoshop

PUB – Microsoft Publisher

QXD – QuarkXPress

SLA / SCD – Scribus

XCF – File format used by the GIMP, as well as other programs

Document[edit]

These files store formatted text and plain text.

0 – Plain Text Document, normally used for licensing

1ST – Plain Text Document, normally preceded by the words “README” (README.1ST)

600 – Plain Text Document, used in UNZIP history log

602 – Text602 document

ABW – AbiWord document

ACL – MS Word AutoCorrect List

AFP – Advanced Function Presentation – IBc

AMI – Lotus Ami Pro

Amigaguide

ANS – American National Standards Institute (ANSI) text

ASC – ASCII text

AWW – Ability Write

CCF – Color Chat 1.0

CSV – ASCII text as comma-separated values, used in spreadsheets and database management systems

CWK – ClarisWorks-AppleWorks document

DBK – DocBook XML sub-format

DITA – Darwin Information Typing Architecture document

DOC – Microsoft Word document

DOCM – Microsoft Word macro-enabled document

DOCX – Office Open XML document

DOT – Microsoft Word document template

DOTX – Office Open XML text document template

DWD – DavkaWriter Heb/Eng word processor file

EGT – EGT Universal Document

EPUB – EPUB open standard for e-books

EZW – Reagency Systems easyOFFER document[6]

FDX – Final Draft

FTM – Fielded Text Meta

FTX – Fielded Text (Declared)

GDOC – Google Drive Document

HTML – HyperText Markup Language (.html, .htm)

HWP – Haansoft (Hancom) Hangul Word Processor document

HWPML – Haansoft (Hancom) Hangul Word Processor Markup Language document

LOG – Text log file

LWP – Lotus Word Pro

MBP – metadata for Mobipocket documents

MD – Markdown text document

ME – Plain text document normally preceded by the word “READ” (READ.ME)

MCW – Microsoft Word for Macintosh (versions 4.0–5.1)

Mobi – Mobipocket documents

NB – Mathematica Notebook

nb – Nota Bene Document (Academic Writing Software)

NBP – Mathematica Player Notebook

NEIS – ν•™κ΅μƒν™œκΈ°λ‘λΆ€ μž‘μ„± ν”„λ‘œκ·Έλž¨ (Student Record Writing Program) Document

NT – N-Triples RDF container (.nt)

NQ – N-Quads RDF container (.nq)

ODM – OpenDocument master document

ODOC – Synology Drive Office Document

ODT – OpenDocument text document

OSHEET – Synology Drive Office Spreadsheet

OTT – OpenDocument text document template

OMM – OmmWriter text document

PAGES – Apple Pages document

PAP – Papyrus word processor document

PDAX – Portable Document Archive (PDA) document index file

PDF – Portable Document Format

QUOX – Question Object File Format for Quobject Designer or Quobject Explorer

Radix-64

RTF – Rich Text document

RPT – Crystal Reports

SDW – StarWriter text document, used in earlier versions of StarOffice

SE – Shuttle Document

STW – OpenOffice.org XML (obsolete) text document template

Sxw – OpenOffice.org XML (obsolete) text document

TeX – TeX

INFO – Texinfo

Troff

TXT – ASCII or Unicode plain text file

UOF – Uniform Office Format

UOML – Unique Object Markup Language

VIA – Revoware VIA Document Project File

WPD – WordPerfect document

WPS – Microsoft Works document

WPT – Microsoft Works document template

WRD – WordIt! document

WRF – ThinkFree Write

WRI – Microsoft Write document

XHTML (xhtml, xht) – eXtensible HyperText Markup Language

XML – eXtensible Markup Language

XPS – Open XML Paper Specification

Financial records[edit]

MYO – MYOB Limited (Windows) File

MYOB – MYOB Limited (Mac) File

TAX – TurboTax File

YNAB – You Need a Budget (YNAB) File

Financial data transfer formats[edit]

Interactive Financial Exchange (IFX) – XML-based specification for various forms of financial transactions

Open Financial Exchange (.ofx) – open standard supported by CheckFree and Microsoft and partly by Intuit; SGML and later XML based

QFX – proprietary pay-only format used only by Intuit

Quicken Interchange Format (.qif) – open standard formerly supported by Intuit

Font file[edit]

ABF – Adobe Binary Screen Font

AFM – Adobe Font Metrics

BDF – Bitmap Distribution Format

BMF – ByteMap Font Format

BRFNT – Binary Revolution Font Format

FNT – Bitmapped Font – Graphics Environment Manager (GEM)

FON – Bitmapped Font – Microsoft Windows

MGF – MicroGrafx Font

OTF – OpenType Font

PCF – Portable Compiled Format

PostScript Font – Type 1, Type 2

PFA – Printer Font ASCII

PFB – Printer Font Binary – Adobe

PFM – Printer Font Metrics – Adobe

AFM – Adobe Font Metrics

FOND – Font Description resource – Mac OS

SFD – FontForge spline font database Font

SNF – Server Normal Format

TDF – TheDraw Font

TFM – TeX font metric

TTF (.ttf, .ttc) – TrueType Font

UFO – Unified Font Object is a cross-platform, cross-application, human readable, future proof format for storing font data.

WOFF – Web Open Font Format

Geographic information system[edit]

ASC – ASCII point of interest (POI) text file

APR – ESRI ArcView 3.3 and earlier project file

DEM – USGS DEM file format

E00 – ARC/INFO interchange file format

GeoJSON –Geographically located data in object notation

GeoTIFF – Geographically located raster data

GML – Geography Markup Language file[7]

GPX – XML-based interchange format

ITN – TomTom Itinerary format

MXD – ESRI ArcGIS project file, 8.0 and higher

NTF – National Transfer Format file

OV2 – TomTom POI overlay file

SHP – ESRI shapefile

TAB – MapInfo Table file format

World TIFF – Geographically located raster data: text file giving corner coordinate, raster cells per unit, and rotation

DTED – Digital Terrain Elevation Data

KML – Keyhole Markup Language, XML-based

Graphical information organizers[edit]

3DT – 3D Topicscape, the database in which the meta-data of a 3D Topicscape is held, it is a form of 3D concept map (like a 3D mind-map) used to organize ideas, information, and computer files

ATY – 3D Topicscape file, produced when an association type is exported; used to permit round-trip (export Topicscape, change files and folders as desired, re-import to 3D Topicscape)

CAG – Linear Reference System

FES – 3D Topicscape file, produced when a fileless occurrence in 3D Topicscape is exported to Windows. Used to permit round-trip (export Topicscape, change files and folders as desired, re-import them to 3D Topicscape)

MGMF – MindGenius Mind Mapping Software file format

MM – FreeMind mind map file (XML)

MMP – Mind Manager mind map file

TPC – 3D Topicscape file, produced when an inter-Topicscape topic link file is exported to Windows; used to permit round-trip (export Topicscape, change files and folders as desired, re-import to 3D Topicscape)

Graphics[edit]

Color palettes[edit]

ACT – Adobe Color Table. Contains a raw color palette and consists of 256 24-bit RGB colour values.

ASE – Adobe Swatch Exchange. Used by Adobe Photoshop, Illustrator, and InDesign.[8]

GPL – GIMP palette file. Uses a text representation of color names and RGB values. Various open source graphical editors can read this format,[9] including GIMP, Inkscape, Krita,[10] KolourPaint, Scribus, CinePaint, and MyPaint.[11]

PAL – Microsoft RIFF palette file

Color management[edit]

ICC/ICM – Color profile conforming the specification of the ICC.

Raster graphics[edit]

Raster or bitmap files store images as a group of pixels.

ART – America Online proprietary format

BLP – Blizzard Entertainment proprietary texture format

BMP – Microsoft Windows Bitmap formatted image

BTI – Nintendo proprietary texture format

CD5 – Chasys Draw IES image

CIT – Intergraph is a monochrome bitmap format

CPT – Corel PHOTO-PAINT image

CR2 – Canon camera raw format; photos have this on some Canon cameras if the quality RAW is selected in camera settings

CLIP – CLIP STUDIO PAINT format

CPL – Windows control panel file

DDS – DirectX texture file

DIB – Device-Independent Bitmap graphic

DjVu – DjVu for scanned documents

EGT – EGT Universal Document, used in EGT SmartSense to compress PNG files to yet a smaller file

Exif – Exchangeable image file format (Exif) is a specification for the image format used by digital cameras

GIF – CompuServe’s Graphics Interchange Format

GRF – Zebra Technologies proprietary format

ICNS – format for icons in macOS. Contains bitmap images at multiple resolutions and bitdepths with alpha channel.

ICO – a format used for icons in Microsoft Windows. Contains small bitmap images at multiple resolutions and bitdepths with 1-bit transparency or alpha channel.

IFF (.iff, .ilbm, .lbm) – ILBM

JNG – a single-frame MNG using JPEG compression and possibly an alpha channel

JPEG, JFIF (.jpg or .jpeg) – Joint Photographic Experts Group; a lossy image format widely used to display photographic images

JP2 – JPEG2000

JPS – JPEG Stereo

KRA – Krita image file

LBM – Deluxe Paint image file

MAX – ScanSoft PaperPort document

MIFF – ImageMagick’s native file format

MNG – Multiple-image Network Graphics, the animated version of PNG

MSP – a format used by old versions of Microsoft Paint; replaced by BMP in Microsoft Windows 3.0

NITF – A U.S. Government standard commonly used in Intelligence systems

OTB – Over The Air bitmap, a specification designed by Nokia for black and white images for mobile phones

PBM – Portable bitmap

PC1 – Low resolution, compressed Degas picture file

PC2 – Medium resolution, compressed Degas picture file

PC3 – High resolution, compressed Degas picture file

PCF – Pixel Coordination Format

PCX – a lossless format used by ZSoft’s PC Paint, popular for a time on DOS systems.

PDN – Paint.NET image file

PGM – Portable graymap

PI1 – Low resolution, uncompressed Degas picture file

PI2 – Medium resolution, uncompressed Degas picture file; also Portrait Innovations encrypted image format

PI3 – High resolution, uncompressed Degas picture file

PICT, PCT – Apple Macintosh PICT image

PNG – Portable Network Graphic (lossless, recommended for display and edition of graphic images)

PNM – Portable anymap graphic bitmap image

PNS – PNG Stereo

PPM – Portable Pixmap (Pixel Map) image

PSB – Adobe Photoshop Big image file (for large files)

PSD, PDD – Adobe Photoshop Drawing

PSP – Paint Shop Pro image

PX – Pixel image editor image file

PXM – Pixelmator image file

PXR – Pixar Image Computer image file

QFX – QuickLink Fax image

RAW – General term for minimally processed image data (acquired by a digital camera)

RLE – a run-length encoding image

SCT – Scitex Continuous Tone image file

SGI, RGB, INT, BW – Silicon Graphics Image

TGA (.tga, .targa, .icb, .vda, .vst, .pix) – Truevision TGA (Targa) image

TIFF (.tif or .tiff) – Tagged Image File Format (usually lossless, but many variants exist, including lossy ones)

TIFF/EP (.tif or .tiff) – Tag Image File Format / Electronic Photography, ISO 12234-2; tends to be used as a basis for other formats rather than in its own right.

VTF – Valve Texture Format

XBM – X Window System Bitmap

XCF – GIMP image (from Gimp’s origin at the eXperimental Computing Facility of the University of California)

XPM – X Window System Pixmap

ZIF – Zoomable/Zoomify Image Format (a web-friendly, TIFF-based, zoomable image format)

Vector graphics[edit]

Vector graphics use geometric primitives such as points, lines, curves, and polygons to represent images.

3DV – 3-D wireframe graphics by Oscar Garcia

AMF – Additive Manufacturing File Format

AWG – Ability Draw

AI – Adobe Illustrator Document

CGM – Computer Graphics Metafile, an ISO Standard

CDR – CorelDRAW Document

CMX – CorelDRAW vector image

DP – Drawing Program file for PERQ[12]

DXF – ASCII Drawing Interchange file Format, used in AutoCAD and other CAD-programs

E2D – 2-dimensional vector graphics used by the editor which is included in JFire

EGT – EGT Universal Document, EGT Vector Draw images are used to draw vector to a website

EPS – Encapsulated Postscript

FS – FlexiPro file

GBR – Gerber file

ODG – OpenDocument Drawing

MOVIE.BYU

RenderMan

SVG – Scalable Vector Graphics, employs XML

Scene description languages (3D vector image formats)

STL – Stereo Lithographic data format (see STL (file format)) used by various CAD systems and stereo lithographic printing machines. See above.

VRML Uses .wrl extension – Virtual Reality Modeling Language, for the creation of 3D viewable web images.

X3D

SXD – OpenOffice.org XML (obsolete) Drawing

TGAX – Texture format used by Zwift

V2D – voucher design used by the voucher management included in JFire

VDOC – Vector format used in AnyCut, CutStorm, DrawCut, DragonCut, FutureDRAW, MasterCut, SignMaster, VinylMaster software by Future Corporation

VSD – Vector format used by Microsoft Visio

VSDX – Vector format used by MS Visio and opened by VSDX Annotator

VND – Vision numeric Drawing file used in TypeEdit, Gravostyle.

WMF – Windows Meta File

EMF – Enhanced (Windows) MetaFile, an extension to WMF

ART – Xara – Drawing (superseded by XAR)

XAR – Xara – Drawing

3D graphics[edit]

3D graphics are 3D models that allow building models in real-time or non-real-time 3D rendering.

3DMF – QuickDraw 3D Metafile (.3dmf)

3DM – OpenNURBS Initiative 3D Model (used by Rhinoceros 3D) (.3dm)

3MF – Microsoft 3D Manufacturing Format (.3mf)[3]

3DS – legacy 3D Studio Model (.3ds)

ABC – Alembic (computer graphics)

AC – AC3D Model (.ac)

AMF – Additive Manufacturing File Format

AN8 – Anim8or Model (.an8)

AOI – Art of Illusion Model (.aoi)

ASM – PTC Creo assembly (.asm)

B3D – Blitz3D Model (.b3d)

BLEND – Blender (.blend)

BLOCK – Blender encrypted blend files (.block)

BMD3 – Nintendo GameCube first-party J3D proprietary model format (.bmd)

BDL4 – Nintendo GameCube and Wii first-party J3D proprietary model format (2002, 2006–2010) (.bdl)

BRRES – Nintendo Wii first-party proprietary model format 2010+ (.brres)

BFRES – Nintendo Wii U and later Switch first-party proprietary model format

C4D – Cinema 4D (.c4d)

Cal3D – Cal3D (.cal3d)

CCP4 – X-ray crystallography voxels (electron density)

CFL – Compressed File Library (.cfl)

COB – Caligari Object (.cob)

CORE3D – Coreona 3D Coreona 3D Virtual File(.core3d)

CTM – OpenCTM (.ctm)

DAE – COLLADA (.dae)

DFF – RenderWare binary stream, commonly used by Grand Theft Auto III-era games as well as other RenderWare titles

DPM – deepMesh (.dpm)

DTS – Torque Game Engine (.dts)

EGG – Panda3D Engine

FACT – Electric Image (.fac)

FBX – Autodesk FBX (.fbx)

G – BRL-CAD geometry (.g)

GLB – a binary form of glTF required to be loaded in Facebook 3D Posts. (.glb)

GLM – Ghoul Mesh (.glm)

glTF – the JSON standard developed by Khronos Group (.gltf)

IOB – Imagine (3D modeling software) (.iob)

JAS – Cheetah 3D file (.jas)

LWO – Lightwave Object (.lwo)

LWS – Lightwave Scene (.lws)

LXF – LEGO Digital Designer Model file (.lxf)

LXO – Luxology Modo (software) file (.lxo)

M3D – Model3D, universal, engine-neutral format (.m3d)

MA – Autodesk Maya ASCII File (.ma)

MAX – Autodesk 3D Studio Max file (.max)

MB – Autodesk Maya Binary File (.mb)

MD2 – Quake 2 model format (.md2)

MD3 – Quake 3 model format (.md3)

MD5 – Doom 3 model format (.md5)

MDX – Blizzard Entertainment’s own model format (.mdx)

MESH – New York University(.m)

MESH – Meshwork Model (.mesh)

MM3D – Misfit Model 3d (.mm3d)

MPO – Multi-Picture Object – This JPEG standard is used for 3d images, as with the Nintendo 3DS

MRC – voxels in cryo-electron microscopy

NIF – Gamebryo NetImmerse File (.nif)

OBJ – Wavefront .obj file (.obj)

OFF – OFF Object file format (.off)

OGEX – Open Game Engine Exchange (OpenGEX) format (.ogex)

PLY – Polygon File Format / Stanford Triangle Format (.ply)

PRC – Adobe PRC (embedded in PDF files)

PRT – PTC Creo part (.prt)

POV – POV-Ray document (.pov)

R3D – Realsoft 3D (Real-3D) (.r3d)

RWX – RenderWare Object (.rwx)

SIA – Nevercenter Silo Object (.sia)

SIB – Nevercenter Silo Object (.sib)

SKP – Google Sketchup file (.skp)

SLDASM – SolidWorks Assembly Document (.sldasm)

SLDPRT – SolidWorks Part Document (.sldprt)

SMD – Valve Studiomdl Data format (.smd)

U3D – Universal 3D format (.u3d)

USD – Universal Scene Description (.usd)

USDA – Universal Scene Description , Human-readable text format (.usda)

USDC – Universal Scene Description , Binary format (.usdc)

USDZ – Universal Scene Description Zip (.usdz)

VIM – Revizto visual information model format (.vimproj)

VRML97 – VRML Virtual reality modeling language (.wrl)

VUE – Vue scene file (.vue)

VWX – Vectorworks (.vwx)

WINGS – Wings3D (.wings)

W3D – Westwood 3D Model (.w3d)

X – DirectX 3D Model (.x)

X3D – Extensible 3D (.x3d)

Z3D – Zmodeler (.z3d)

Links and shortcuts[edit]

Alias (Mac OS)

JNLP – Java Network Launching Protocol, an XML file used by Java Web Start for starting Java applets over the Internet

LNK – binary-format file shortcut in Microsoft Windows 95 and later

APPREF-MS – File shortcut format used by ClickOnce

URL – INI file pointing to a URL bookmarks/Internet shortcut in Microsoft Windows

.

.WEBLOC

‘Property list file’ pointing to a URL bookmarks/Internet shortcut in macOS

.

SYM – Symbolic link

.desktop – Desktop entry on Linux Desktop environments

Mathematical[edit]

Harwell-Boeing file format – a format designed to store sparse matrices

MML – MathML – Mathematical Markup Language

ODF – OpenDocument Math Formula

SXM – OpenOffice.org XML (obsolete) Math Formula

Object code, executable files, shared and dynamically linked libraries[edit]

.8BF files – plugins for some photo editing programs including Adobe Photoshop, Paint Shop Pro, GIMP and Helicon Filter.

.a – Objective C native static library

a.out – (no suffix for executable image, .o for object files, .so for shared object files) classic UNIX object format, now often superseded by ELF

APK – Android Application Package

APP – A folder found on macOS systems containing program code and resources, appearing as one file.

BAC – an executable image for the RSTS/E system, created using the BASIC-PLUS COMPILE command[13]

BPL – a Win32 PE file created with Borland Delphi or C++Builder containing a package.

Bundle – a Macintosh plugin created with Xcode or make which holds executable code, data files, and folders for that code.

.Class – used in Java

COFF (no suffix for executable image, .o for object files) – UNIX Common Object File Format, now often superseded by ELF

COM files – commands used in DOS and CP/M

DCU – Delphi compiled unit

DLL – library used in Windows and OS/2 to store data, resources and code.

DOL – the format used by the GameCube and Wii, short for Dolphin, which was the codename of the GameCube.

.EAR – archives of Java enterprise applications

ELF – (no suffix for executable image, .o for object files, .so for shared object files) used in many modern Unix and Unix-like systems, including Solaris, other System V Release 4 derivatives, Linux, and BSD)

expander (see bundle)

DOS executable (.exe – used in DOS)

.IPA – apple IOS application executable file. Another form of zip file.

JEFF – a file format allowing execution directly from static memory[14]

.JAR – archives of Java class files

.XPI – PKZIP archive that can be run by Mozilla web browsers to install software.

Mach-O – (no suffix for executable image, .o for object files, .dylib and .bundle for shared object files) Mach-based systems, notably native format of macOS, iOS, watchOS, and tvOS

NetWare Loadable Module (.NLM) – the native 32-bit binaries compiled for Novell’s NetWare Operating System (versions 3 and newer)

New Executable (.EXE – used in multitasking (“European”) MS-DOS 4.0, 16-bit Microsoft Windows, and OS/2)

.o – un-linked object files directly from the compiler

Obb – a file that developers create along with some APK packages to support the application.

Portable Executable (.EXE, – used in Microsoft Windows and some other systems)

Preferred Executable Format – (classic Mac OS for PowerPC applications; compatible with macOS via a classic (Mac OS X) emulator)

RLL – used in Microsoft operating systems together with a DLL file to store program resources

.s1es – Executable used for S1ES learning system.

.so – shared library, typically ELF

Value Added Process (.VAP) – the native 16-bit binaries compiled for Novell’s NetWare Operating System (version 2, NetWare 286, Advanced NetWare, etc.)

.WAR – archives of Java Web applications

XBE – Xbox executable

.XAP – Windows Phone package

XCOFF – (no suffix for executable image, .o for object files, .a for shared object files) extended COFF, used in AIX

XEX – Xbox 360 executable

Object extensions

.VBX – Visual Basic extensions

.OCX – Object Control extensions

.TLB – Windows Type Library

Page description language[edit]

DVI – Device independent format

EGT – Universal Document can be used to store CSS type styles (*.egt)

PLD

PCL

PDF – Portable Document Format

PostScript (.ps, .ps.gz)

SNP – Microsoft Access Report Snapshot

XPS

XSL-FO (Formatting Objects)

Configurations, Metadata

CSS – Cascading Style Sheets

XSLT, XSL – XML Style Sheet (.xslt, .xsl)

TPL – Web template (.tpl)

Personal information manager[edit]

MSG – Microsoft Outlook task manager

ORG – Lotus Organizer PIM package

PST, OST – Microsoft Outlook email communication

SC2 – Microsoft Schedule+ calendar

Presentation[edit]

GSLIDES – Google Drive Presentation

KEY, KEYNOTE – Apple Keynote Presentation

NB – Mathematica Slideshow

NBP – Mathematica Player slideshow

ODP – OpenDocument Presentation

OTP – OpenDocument Presentation template

PEZ – Prezi Desktop Presentation

POT – Microsoft PowerPoint template

PPS – Microsoft PowerPoint Show

PPT – Microsoft PowerPoint Presentation

PPTX – Office Open XML Presentation

PRZ – Lotus Freelance Graphics

SDD – StarOffice’s StarImpress

SHF – ThinkFree Show

SHOW – Haansoft(Hancom) Presentation software document

SHW – Corel Presentations slide show creation

SLP – Logix-4D Manager Show Control Project

SSPSS – SongShow Plus Slide Show

STI – OpenOffice.org XML (obsolete) Presentation template

SXI – OpenOffice.org XML (obsolete) Presentation

THMX – Microsoft PowerPoint theme template

WATCH – Dataton Watchout Presentation

Project management software[edit]

MPP – Microsoft Project

Reference management software[edit]

Formats of files used for bibliographic information (citation) management.

bib – BibTeX

enl – EndNote

ris – Research Information Systems RIS (file format)

Scientific data (data exchange)[edit]

FITS (Flexible Image Transport System) – standard data format for astronomy (.fits)

Silo – a storage format for visualization developed at Lawrence Livermore National Laboratory

SPC – spectroscopic data

EAS3 – binary format for structured data

EOSSA – Electro-Optic Space Situational Awareness format

OST (Open Spatio-Temporal) – extensible, mainly images with related data, or just pure data; meant as an open alternative for microscope images

CCP4 – X-ray crystallography voxels (electron density)

MRC – voxels in cryo-electron microscopy

HITRAN – spectroscopic data with one optical/infrared transition per line in the ASCII file (.hit)

.root – hierarchical platform-independent compressed binary format used by ROOT

Simple Data Format (SDF) – a platform-independent, precision-preserving binary data I/O format capable of handling large, multi-dimensional arrays.

MYD – Everfine LEDSpec software file for LED measurements

Multi-domain[edit]

NetCDF – Network common data format

HDR, [HDF], h4 or h5 – Hierarchical Data Format

SDXF – (Structured Data Exchange Format)

CDF – Common Data Format

CGNS – CFD General Notation System

FMF – Full-Metadata Format

Meteorology[edit]

GRIB – Grid in Binary, WMO format for weather model data

BUFR – WMO format for weather observation data

PP – UK Met Office format for weather model data

NASA-Ames – Simple text format for observation data. First used in aircraft studies of the atmosphere.

Chemistry[edit]

CML – Chemical Markup Language (CML) (.cml)

Chemical table file (CTab) (.mol, .sd, .sdf)

Joint Committee on Atomic and Molecular Physical Data (JCAMP) (.dx, .jdx)

Simplified molecular input line entry specification (SMILES) (.smi)

Mathematics[edit]

graph6, sparse6 – ASCII encoding of Adjacency matrices (.g6, .s6)

Biology[edit]

Molecular biology and bioinformatics:

AB1 – In DNA sequencing, chromatogram files used by instruments from Applied Biosystems

ACE – A sequence assembly format

ASN.1– Abstract Syntax Notation One, is an International Standards Organization (ISO) data representation format used to achieve interoperability between platforms. NCBI uses ASN.1 for the storage and retrieval of data such as nucleotide and protein sequences, structures, genomes, and PubMed records.

BAM – Binary Alignment/Map format (compressed SAM format)

BCF – Binary compressed VCF format

BED – The browser extensible display format is used for describing genes and other features of DNA sequences

CAF – Common Assembly Format for sequence assembly

CRAM – compressed file format for storing biological sequences aligned to a reference sequence

DDBJ – The flatfile format used by the DDBJ to represent database records for nucleotide and peptide sequences from DDBJ databases.

EMBL – The flatfile format used by the EMBL to represent database records for nucleotide and peptide sequences from EMBL databases.

FASTA – The FASTA format, for sequence data. Sometimes also given as FNA or FAA (Fasta Nucleic Acid or Fasta Amino Acid).

FASTQ – The FASTQ format, for sequence data with quality. Sometimes also given as QUAL.

GCPROJ – The Genome Compiler project. Advanced format for genetic data to be designed, shared and visualized.

GenBank – The flatfile format used by the NCBI to represent database records for nucleotide and peptide sequences from the GenBank and RefSeq databases

GFF – The General feature format is used to describe genes and other features of DNA, RNA, and protein sequences

GTF – The Gene transfer format is used to hold information about gene structure

MAF – The Multiple Alignment Format stores multiple alignments for whole-genome to whole-genome comparisons [4]

NCBI ASN.1 – Structured ASN.1 format used at National Center for Biotechnology Information for DNA and protein data

NEXUS – The Nexus file encodes mixed information about genetic sequence data in a block structured format

NeXML–XML format for phylogenetic trees

NWK – The Newick tree format is a way of representing graph-theoretical trees with edge lengths using parentheses and commas and useful to hold phylogenetic trees.

PDB – structures of biomolecules deposited in Protein Data Bank, also used to exchange protein and nucleic acid structures

PHD – Phred output, from the basecalling software Phred

PLN – Protein Line Notation used in proteax software specification

SAM – Sequence Alignment Map format, in which the results of the 1000 Genomes Project will be released

SBML – The Systems Biology Markup Language is used to store biochemical network computational models

SCF – Staden chromatogram files used to store data from DNA sequencing

SFF – Standard Flowgram Format

SRA – format used by the National Center for Biotechnology Information Short Read Archive to store high-throughput DNA sequence data

Stockholm – The Stockholm format for representing multiple sequence alignments

Swiss-Prot – The flatfile format used to represent database records for protein sequences from the Swiss-Prot database

VCF – Variant Call Format, a standard created by the 1000 Genomes Project that lists and annotates the entire collection of human variants (with the exception of approximately 1.6 million variants).

Biomedical imaging[edit]

Digital Imaging and Communications in Medicine (DICOM) (.dcm)

Neuroimaging Informatics Technology Initiative (NIfTI)

.nii – single-file (combined data and meta-data) style

.nii.gz – gzip-compressed, used transparently by some software, notably the FMRIB Software Library (FSL)

.gii – single-file (combined data and meta-data) style; NIfTI offspring for brain surface data

.img,.hdr – dual-file (separate data and meta-data, respectively) style

AFNI data, meta-data (.BRIK,.HEAD)

Massachusetts General Hospital imaging format, used by the FreeSurfer brain analysis package

.MGH – uncompressed

.MGZ – zip-compressed

Analyze data, meta-data (.img,.hdr)

Medical Imaging NetCDF (MINC) format, previously based on NetCDF; since version 2.0, based on HDF5 (.mnc)

Biomedical signals (time series)[edit]

ACQ – AcqKnowledge format for Windows/PC from Biopac Systems Inc., Goleta, CA, USA

ADICHT – LabChart format from ADInstruments Pty Ltd, Bella Vista NSW, Australia

BCI2000 – The BCI2000 project, Albany, NY, USA

BDF – BioSemi data format from BioSemi B.V. Amsterdam, Netherlands

BKR – The EEG data format developed at the University of Technology Graz, Austria

CFWB – Chart Data Format from ADInstruments Pty Ltd, Bella Vista NSW, Australia

DICOM – Waveform An extension of Dicom for storing waveform data

ecgML – A markup language for electrocardiogram data acquisition and analysis

EDF/EDF+ – European Data Format

FEF – File Exchange Format for Vital signs, CEN TS 14271

GDF v1.x – The General Data Format for biomedical signals, version 1.x

GDF v2.x – The General Data Format for biomedical signals, version 2.x

HL7aECG – Health Level 7 v3 annotated ECG

MFER – Medical waveform Format Encoding Rules

OpenXDF – Open Exchange Data Format from Neurotronics, Inc., Gainesville, FL, USA

SCP-ECG – Standard Communication Protocol for Computer assisted electrocardiography EN1064:2007

SIGIF – A digital SIGnal Interchange Format with application in neurophysiology

WFDB – Format of Physiobank

XDF – eXtensible Data Format

Other biomedical formats[edit]

Health Level 7 (HL7) – a framework for exchange, integration, sharing, and retrieval of health information electronically

xDT – a family of data exchange formats for medical records

Biometric formats[edit]

CBF – Common Biometric Format, based on CBEFF 2.0 (Common Biometric ExFramework).

EBF – Extended Biometric Format, based on CBF but with S/MIME encryption support and semantic extensions

CBFX – XML Common Biometric Format, based upon XCBF 1.1 (OASIS XML Common Biometric Format)

EBFX – XML Extended Biometric Format, based on CBFX but with W3C XML Encryption support and semantic extensions

Programming languages and scripts[edit]

ADB – Ada body

ADS – Ada specification

AHK – AutoHotkey script file

APPLESCRIPT- applescript – see SCPT

AS – Adobe Flash ActionScript File

AU3 – AutoIt version 3

BAT – Batch file

BAS – QBasic & QuickBASIC

BTM β€” Batch file

CLASS β€” Compiled Java binary

CLJS – ClojureScript

CMD – Batch file

Coffee – CoffeeScript

C – C

CPP – C++

CS – C#

INO – Arduino sketch (program)

EGG – Chicken

EGT – EGT Asterisk Application Source File, EGT Universal Document

ERB – Embedded Ruby, Ruby on Rails Script File

HTA – HTML Application

IBI – Icarus script

ICI – ICI

IJS – J script

.ipynb – IPython Notebook

ITCL – Itcl

JS – JavaScript and JScript

JSFL – Adobe JavaScript language

.kt – Kotlin

LUA – Lua

M – Mathematica package file

MRC – mIRC Script

NCF – NetWare Command File (scripting for Novell’s NetWare OS)

NUC – compiled script

NUD – C++ External module written in C++

NUT – Squirrel

O β€” Compiled and optimized C/C++ binary

pde – Processing (programming language), Processing script

PHP – PHP

PHP? – PHP (? = version number)

PL – Perl

PM – Perl module

PS1 – Windows PowerShell shell script

PS1XML – Windows PowerShell format and type definitions

PSC1 – Windows PowerShell console file

PSD1 – Windows PowerShell data file

PSM1 – Windows PowerShell module file

PY – Python

PYC – Python byte code files

PYO – Python

R – R scripts

r – REBOL scripts

RB – Ruby

RDP – RDP connection

red – Red scripts

RS – Rust (programming language)

SB2/SB3 – Scratch

SCPT – Applescript

SCPTD – See SCPT.

SDL – State Description Language

SH – Shell script

SYJS – SyMAT JavaScript

SYPY – SyMAT Python

TCL – Tcl

TNS – Ti-Nspire Code/File

VBS – Visual Basic Script

XPL – XProc script/pipeline

ebuild – Gentoo linux’s portage package

.

Security

Authentication and general encryption formats are listed here.

OpenPGP Message Format – used by Pretty Good Privacy, GNU Privacy Guard, and other OpenPGP software; can contain keys, signed data, or encrypted data; can be binary or text (“ASCII armored”)
Certificates and keys[edit]
GXK – Galaxkey, an encryption platform for authorized, private and confidential email communication[citation needed]
OpenSSH private key (.ssh) – Secure Shell private key; format generated by ssh-keygen or converted from PPK with PuTTYgen[15][16][17]
OpenSSH public key (.pub) – Secure Shell public key; format generated by ssh-keygen or PuTTYgen[15][16][17]
PuTTY private key (.ppk) – Secure Shell private key, in the format generated by PuTTYgen instead of the format used by OpenSSH[15][16][17]
nSign public key (.nSign) – nSign public key in a custom format[18]
X.509[edit]
Distinguished Encoding Rules (.cer, .crt, .der) – stores certificates
PKCS#7 SignedData (.p7b, .p7c) – commonly appears without main data, just certificates or certificate revocation lists (CRLs)
PKCS#12 (.p12, .pfx) – can store public certificates and private keys
PEM – Privacy-enhanced Electronic Mail: full format not widely used, but often used to store Distinguished Encoding Rules in Base64 format
PFX – Microsoft predecessor of PKCS#12
Encrypted files[edit]
This section shows file formats for encrypted general data, rather than a specific program’s data.

AXX – Encrypted file, created with AxCrypt
EEA – An encrypted CAB, ostensibly for protecting email attachments
TC – Virtual encrypted disk container, created by TrueCrypt
KODE – Encrypted file, created with KodeFile
nSignE – A encrypted private key, created by nSign[18]
Password files[edit]
Password files (sometimes called keychain files) contain lists of other passwords, usually encrypted.

BPW – Encrypted password file created by Bitser password manager

KDB – KeePass 1 database

KDBX – KeePass 2 database

Signal data (non-audio)[edit]

ACQ – AcqKnowledge format for Windows/PC from Biopac

ADICHT – LabChart format from ADInstruments

BKR – The EEG data format developed at the University of Technology Graz

BDF, CFG – Configuration file for Comtrade data

CFWB – Chart Data format from ADInstruments

DAT – Raw data file for Comtrade data

EDF – European data format

FEF – File Exchange Format for Vital signs

GDF – General data formats for biomedical signals

GMS – Gesture And Motion Signal format

IROCK – intelliRock Sensor Data File Format

MFER – Medical waveform Format Encoding Rules

SAC – Seismic Analysis Code, earthquake seismology data format[19]

SCP-ECG – Standard Communication Protocol for Computer assisted electrocardiography

SEED, MSEED – Standard for the Exchange of Earthquake Data, seismological data and sensor metadata[20]

SEGY – Reflection seismology data format

SIGIF – SIGnal Interchange Format

WIN, WIN32 – NIED/ERI seismic data format (.cnt)[21]

Sound and music[edit]

Lossless audio[edit]

Uncompressed[edit]

8SVX – Commodore-Amiga 8-bit sound (usually in an IFF container)

16SVX – Commodore-Amiga 16-bit sound (usually in an IFF container)

AIFF, AIF, AIFC – Audio Interchange File Format

AU – Simple audio file format introduced by Sun Microsystems

BWF – Broadcast Wave Format, an extension of WAVE

CDDA – Compact Disc Digital Audio

DSF, DFF – Direct Stream Digital audio file, also used in Super Audio CD

RAW – Raw samples without any header or sync

WAV – Microsoft Wave

Compressed[edit]

RA, RM – RealAudio format

FLAC – Free lossless codec of the Ogg project

LA – Lossless Audio

PAC – LPAC

APE – Monkey’s Audio

OFR, OFS, OFF – OptimFROG

RKA – RKAU

SHN – Shorten

TAK – Tom’s Lossless Audio Kompressor[22]

THD – Dolby TrueHD

TTA – Free lossless audio codec (True Audio)

WV – WavPack

WMA – Windows Media Audio 9 Lossless

BRSTM – Binary Revolution Stream[23]

DTS, DTSHD, DTSMA – DTS (sound system)

AST – Nintendo Audio Stream

AW – Nintendo Audio Sample used in first-party games

PSF – Portable Sound Format, PlayStation variant (originally PlayStation Sound Format)

Lossy audio[edit]

AC3 – Usually used for Dolby Digital tracks

AMR – For GSM and UMTS based mobile phones

MP1 – MPEG Layer 1

MP2 – MPEG Layer 2

MP3

MPEG Layer 3

SPX – Speex (Ogg project, specialized for voice, low bitrates)

GSM – GSM Full Rate, originally developed for use in mobile phones

.

WMA –

Windows Media Audio

.

*AAC* –>

“Advanced Audio Coding”

(usually in an ‘MPEG-4 container’)

.

MPC –

Musepack

VQF – Yamaha TwinVQ

OTS – Audio File (similar to MP3, with more data stored in the file and slightly better compression; designed for use with OtsLabs’ OtsAV)

SWA – Macromedia Shockwave Audio (Same compression as MP3 with additional header information specific to Macromedia Director

.

VOX –

“Dialogic ADPCM Low Sample Rate Digitized Voice”

.

VOC – Creative Labs Soundblaster Creative Voice 8-bit & 16-bit Also output format of RCA Audio Recorders

DWD – DiamondWare Digitized

SMP – Turtlebeach SampleVision

OGG – Ogg Vorbis

Tracker modules and related[edit]

MOD – Soundtracker and Protracker sample and melody modules

MT2 – MadTracker 2 module

S3M – Scream Tracker 3 module

XM – Fast Tracker module

IT – Impulse Tracker module

NSF – NES Sound Format

MID, MIDI – Standard MIDI file; most often just notes and controls but occasionally also sample dumps (.mid, .rmi)

FTM – FamiTracker Project file

Sheet music files[edit]

ABC – ABC Notation sheet music file

DARMS – DARMS File Format also known as the Ford-Columbia Format

ETF – Enigma Transportation Format abandoned sheet music exchange format

GP* – Guitar Pro sheet music and tablature file

KERN – Kern File Format sheet music file

LY – LilyPond sheet music file

MEI – Music Encoding Initiative file format that attempts to encode all musical notations

MUS, MUSX – Finale sheet music file

.

MXL, XML –

MusicXML standard sheet music exchange format

.

MSCX, MSCZ – MuseScore sheet music file

SMDL – Standard Music Description Language sheet music file

SIB – Sibelius sheet music file

Other file formats pertaining to audio[edit]

NIFF – Notation Interchange File Format

PTB – Power Tab Editor tab

ASF – Advanced Systems Format

CUST – DeliPlayer custom sound format

GYM – Genesis YM2612 log

JAM – Jam music format

MNG – Background music for the Creatures game series, starting from Creatures 2

RMJ – RealJukebox Media used for RealPlayer

SID – Sound Interface Device – Commodore 64 instructions to play SID music and sound effects

SPC – Super NES sound format

TXM – Track ax media

VGM – Stands for “Video Game Music”, log for several different chips

YM – Atari ST/Amstrad CPC YM2149 sound chip format

PVD – Portable Voice Document used for Oaisys & Mitel call recordings

Playlist formats[edit]

AIMPPL – AIMP Playlist format

ASX – Advanced Stream Redirector

RAM – Real Audio Metafile For RealAudio files only.

XPL – HDi playlist

XSPF – XML Shareable Playlist Format

ZPL – Xbox Music (Formerly Zune) Playlist format from Microsoft

M3U – Multimedia playlist file

PLS – Multimedia playlist, originally developed for use with the museArc

Audio editing and music production[edit]

ALS – Ableton Live set

ALC – Ableton Live clip

ALP – Ableton Live pack

ATMOS, AUDIO, METADATA – Dolby Atmos Rendering and Mastering related file

AUP – Audacity project file

BAND – GarageBand project file

CEL – Adobe Audition loop file (Cool Edit Loop)

CPR – Steinberg Cubase project file

CWP – Cakewalk Sonar project file

DRM – Steinberg Cubase drum file

DMKIT – Image-Line’s Drumaxx drum kit file

ENS – Native Instruments Reaktor Ensemble

FLP – Image Line FL Studio project file

GRIR – Native Instruments Komplete Guitar Rig Impulse Response

LOGIC – Logic Pro X project file

MMP – LMMS project file (alternatively MMPZ for compressed formats)

MMR – MAGIX Music Maker project file

MX6HS – Mixcraft 6 Home Studio project file

NPR – Steinberg Nuendo project file

OMF, OMFI – Open Media Framework Interchange OMFI succeeds OMF (Open Media Framework)

RIN – Soundways RIN-M file containing sound recording participant credits and song information

RPP, RPP-BAK – REAPER project file

REAPEAKS – REAPER peak (waveform cache) file

SES – Adobe Audition multitrack session file

SFK – Sound Forge waveform cache file

SFL – Sound Forge sound file

SNG – MIDI sequence file (MidiSoft, Korg, etc.) or n-Track Studio project file

STF – StudioFactory project file. It contains all necessary patches, samples, tracks and settings to play the file

SND – Akai MPC sound file

SYN – SynFactory project file. It contains all necessary patches, samples, tracks and settings to play the file

UST – Utau Editor sequence excluding wave-file

VCLS – VocaListener project file

VPR – Vocaloid 5 Editor sequence excluding wave-file

VSQ – Vocaloid 2 Editor sequence excluding wave-file

VSQX – Vocaloid 3 & 4 Editor sequence excluding wave-file

Recorded television formats[edit]

DVR-MS – Windows XP Media Center Edition’s Windows Media Center recorded television format

WTV – Windows Vista’s and up Windows Media Center recorded television format

Source code for computer programs[edit]

ADA, ADB, 2.ADA – Ada (body) source

ADS, 1.ADA – Ada (specification) source

ASM, S – Assembly language source

BAS – BASIC, FreeBASIC, Visual Basic, BASIC-PLUS source,[13] PICAXE basic

BB – Blitz Basic Blitz3D

BMX – Blitz Basic BlitzMax

C – C source

CLJ – Clojure source code

CLS – Visual Basic class

COB, CBL – COBOL source

CPP, CC, CXX, C, CBP – C++ source

CS – C# source

CSPROJ – C# project (Visual Studio .NET)

D – D source

DBA – DarkBASIC source

DBPro123 – DarkBASIC Professional project

E – Eiffel source

EFS – EGT Forever Source File

EGT – EGT Asterisk Source File, could be J, C#, VB.net, EF 2.0 (EGT Forever)

EL – Emacs Lisp source

FOR, FTN, F, F77, F90 – Fortran source

FRM – Visual Basic form

FRX – Visual Basic form stash file (binary form file)

FTH – Forth source

GED – Game Maker Extension Editable file as of version 7.0

GM6 – Game Maker Editable file as of version 6.x

GMD – Game Maker Editable file up to version 5.x

GMK – Game Maker Editable file as of version 7.0

GML – Game Maker Language script file

GO – Go source

H – C/C++ header file

HPP, HXX – C++ header file

HS – Haskell source

I – SWIG interface file

INC – Turbo Pascal included source

JAVA – Java source

L – lex source

LGT – Logtalk source

LISP – Common Lisp source

M – Objective-C source

M – MATLAB

M – Mathematica

M4 – m4 source

ML – Standard ML and OCaml source

MSQR – MΒ² source file, created by Mattia Marziali

N – Nemerle source

NB – Nuclear Basic source

P – Parser source

PAS, PP, P – Pascal source (DPR for projects)

PHP, PHP3, PHP4, PHP5, PHPS, Phtml – PHP source

PIV – Pivot stickfigure animator

PL, PM – Perl

PLI, PL1 – PL/I

PRG – Ashton-Tate; dbII, dbIII and dbIV, db, db7, clipper, Microsoft Fox and FoxPro, harbour, xharbour, and Xbase

PRO – IDL

POL – Apcera Policy Language doclet

PY – Python source

R – R source

RED – Red source

REDS – Red/System source

RB – Ruby source

RESX – Resource file for .NET applications

RC, RC2 – Resource script files to generate resources for .NET applications

RKT, RKTL – Racket source

SCALA – Scala source

SCI, SCE – Scilab

SCM – Scheme source

SD7 – Seed7 source

SKB, SKC – Sage Retrieve 4GL Common Area (Main and Amended backup)

SKD – Sage Retrieve 4GL Database

SKF, SKG – Sage Retrieve 4GL File Layouts (Main and Amended backup)

SKI – Sage Retrieve 4GL Instructions

SKK – Sage Retrieve 4GL Report Generator

SKM – Sage Retrieve 4GL Menu

SKO – Sage Retrieve 4GL Program

SKP, SKQ – Sage Retrieve 4GL Print Layouts (Main and Amended backup)

SKS, SKT – Sage Retrieve 4GL Screen Layouts (Main and Amended backup)

SKZ – Sage Retrieve 4GL Security File

SLN – Visual Studio solution

SPIN – Spin source (for Parallax Propeller microcontrollers)

STK – Stickfigure file for Pivot stickfigure animator

SWG – SWIG source code

TCL – TCL source code

VAP – Visual Studio Analyzer project

VB – Visual Basic.NET source

VBG – Visual Studio compatible project group

VBP, VIP – Visual Basic project

VBPROJ – Visual Basic .NET project

VCPROJ – Visual C++ project

VDPROJ – Visual Studio deployment project

XPL – XProc script/pipeline

XQ – XQuery file

XSL – XSLT stylesheet

Y – yacc source

Spreadsheet[edit]

123 – Lotus 1-2-3

AB2 – Abykus worksheet

AB3 – Abykus workbook

AWS – Ability Spreadsheet

BCSV – Nintendo proprietary table format

CLF – ThinkFree Calc

CELL – Haansoft(Hancom) SpreadSheet software document

CSV – Comma-Separated Values

GSHEET – Google Drive Spreadsheet

numbers – An Apple Numbers Spreadsheet file

gnumeric – Gnumeric spreadsheet, a gziped XML file

LCW – Lucid 3-D

ODS – OpenDocument spreadsheet

OTS – OpenDocument spreadsheet template

QPW – Quattro Pro spreadsheet

SDC – StarOffice StarCalc Spreadsheet

SLK – SYLK (SYmbolic LinK)

STC – OpenOffice.org XML (obsolete) Spreadsheet template

SXC – OpenOffice.org XML (obsolete) Spreadsheet

TAB – tab delimited columns; also TSV (Tab-Separated Values)

TXT – text file

VC – Visicalc

WK1 – Lotus 1-2-3 up to version 2.01

WK3 – Lotus 1-2-3 version 3.0

WK4 – Lotus 1-2-3 version 4.0

WKS – Lotus 1-2-3

WKS – Microsoft Works

WQ1 – Quattro Pro DOS version

XLK – Microsoft Excel worksheet backup

XLS – Microsoft Excel worksheet sheet (97–2003)

XLSB – Microsoft Excel binary workbook

XLSM – Microsoft Excel Macro-enabled workbook

XLSX – Office Open XML worksheet sheet

XLR – Microsoft Works version 6.0

XLT – Microsoft Excel worksheet template

XLTM – Microsoft Excel Macro-enabled worksheet template

XLW – Microsoft Excel worksheet workspace (version 4.0)

Tabulated data[edit]

TSV – Tab-separated values

CSV – Comma-separated values

db – databank format; accessible by many econometric applications

dif – accessible by many spreadsheet applications

Video[edit]

AAF – mostly intended to hold edit decisions and rendering information, but can also contain compressed media essence

3GP – the most common video format for cell phones

GIF – Animated GIF (simple animation; until recently often avoided because of patent problems)

ASF – container (enables any form of compression to be used; MPEG-4 is common; video in ASF-containers is also called Windows Media Video (WMV))

AVCHD – Advanced Video Codec High Definition

AVI – container (a shell, which enables any form of compression to be used)

BIK (.bik) – Bink Video file. A video compression system developed by RAD Game Tools

BRAW – a video format used by Blackmagic’s Ursa Mini Pro 12K cameras.

CAM – aMSN webcam log file

COLLAB – Blackboard Collaborate session recording

DAT – video standard data file (automatically created when we attempted to burn as video file on the CD)

DSH

DVR-MS – Windows XP Media Center Edition’s Windows Media Center recorded television format

FLV – Flash video (encoded to run in a flash animation)

M1V MPEG-1 – Video

M2V MPEG-2 – Video

FLA – Macromedia Flash (for producing)

FLR – (text file which contains scripts extracted from SWF by a free ActionScript decompiler named FLARE)

SOL – Adobe Flash shared object (“Flash cookie”)

M4V – video container file format developed by Apple

Matroska (.mkv) – Matroska is a container format, which enables any video format such as MPEG-4 ASP or AVC to be used along with other content such as subtitles and detailed meta information WRAP – MediaForge (.wrap)

MNG – mainly simple animation containing PNG and JPEG objects, often somewhat more complex than animated GIF

QuickTime (.mov) – container which enables any form of compression to be used; Sorenson codec is the most common; QTCH is the filetype for cached video and audio streams

MPEG (.mpeg, .mpg, .mpe)

THP – Nintendo proprietary movie/video format

MPEG-4 Part 14, shortened “MP4” – multimedia container (most often used for Sony’s PlayStation Portable and Apple’s iPod)

,

MXF

Material Exchange Format

(standardized wrapper format for audio/visual material developed by SMPTE)

ROQ – used by Quake 3

NSV – Nullsoft Streaming Video (media container designed for streaming video content over the Internet)

Ogg – container, multimedia

RM – RealMedia

SVI – Samsung video format for portable players

SMI – SAMI Caption file (HTML like subtitle for movie files)

SMK (.smk) – Smacker video file. A video compression system developed by RAD Game Tools

SWF – Macromedia Flash (for viewing)

WMV – Windows Media Video (See ASF)

WTV – Windows Vista’s and up Windows Media Center recorded television format

YUV – raw video format; resolution (horizontal x vertical) and sample structure 4:2:2 or 4:2:0 must be known explicitly

WebM – video file format for web video using HTML5

Video editing, production[edit]

BRAW – Blackmagic Design RAW video file name

FCP – Final Cut Pro project file

MSWMM – Windows Movie Maker project file

PPJ & PRPROJ– Adobe Premiere Pro video editing file

.

IMOVIEPROJ – iMovie project file

.

VEG & VEG-BAK – Sony Vegas project file

SUF – Sony camera configuration file (setup.suf) produced by XDCAM-EX camcorders

WLMP – Windows Live Movie Maker project file

KDENLIVE – Kdenlive project file

VPJ – VideoPad project file

MOTN – Apple Motion project file

IMOVIEMOBILE – iMovie project file for iOS users

WFP / WVE β€” Wondershare Filmora Project

WLMP – Windows Live Movie Maker project

PDS – Cyberlink PowerDirector project

Video game data[edit]

List of common file formats of data for video games on systems that support filesystems, most commonly PC games.

Minecraft β€” files used by Mojang to develop Minecraft

.

MCADDON –

format used by the Bedrock Edition of Minecraft for add-ons; Resource packs for the game

.

MCFUNCTION –

format used by Minecraft for storing functions

.

MCMETA – format used by Minecraft for storing data for customizable texture packs for the game

MCPACK – format used by the Bedrock Edition of Minecraft for in-game texture packs; full addons for the game

MCR – format used by Minecraft for storing data for in-game worlds before version 1.2

MCTEMPLATE – format used by the Bedrock Edition of Minecraft for world templates

MCWORLD – format used by the Bedrock Edition of Minecraft for in-game worlds

NBS – format used by Note Block Studio, a tool that can be used to make note block songs for Minecraft.

TrackMania United/Nations Forever Engine – Formats used by games based on the TrackMania engine.

XeX

CHALLENGE.GBX – (Edited) Challenge files.

CONSTRUCTIONCAMPAIGN.GBX – Construction campaigns files.

CONTROLEFFECTMASTER.GBX/CONTROLSTYLE.GBX – Menu parts.

FIDCACHE.GBX – Saved game.

GBX – Other TrackMania items.

REPLAY.GBX – Replays of races.

Doom engine – Formats used by games based on the Doom engine.

DEH – DeHackEd files to mutate the game executable (not officially part of the DOOM engine)

DSG – Saved game

LMP – A lump is an entry in a DOOM wad.

LMP – Saved demo recording

MUS – Music file (usually contained within a WAD file)

WAD – Data storage (contains music, maps, and textures)

Quake engine – Formats used by games based on the Quake engine.

BSP – (For Binary space partitioning) compiled map format

MAP – Raw map format used by editors like GtkRadiant or QuArK

MDL/MD2/MD3/MD5 – Model for an item used in the game

PAK/PK2 – Data storage

PK3/PK4 – used by the Quake II, Quake III Arena and Quake 4 game engines, respectively, to store game data, textures etc. They are actually .zip files.

.dat – not specific file type, often generic extension for “data” files for a variety of applications

sometimes used for general data contained within the .PK3/PK4 files

.fontdat – a .dat file used for formatting game fonts

.roq – Video format

.sav – Savegame format

Unreal Engine – Formats used by games based on the Unreal engine.

U – Unreal script format

UAX – Animations format for Unreal Engine 2

UMX – Map format for Unreal Tournament

UMX – Music format for Unreal Engine 1

UNR – Map format for Unreal

UPK – Package format for cooked content in Unreal Engine 3

USX – Sound format for Unreal Engine 1 and Unreal Engine 2

UT2 – Map format for Unreal Tournament 2003 and Unreal Tournament 2004

UT3 – Map format for Unreal Tournament 3

UTX – Texture format for Unreal Engine 1 and Unreal Engine 2

UXX – Cache format; these are files a client downloaded from server (which can be converted to regular formats)

Duke Nukem 3D Engine – Formats used by games based on this engine

DMO – Save game

GRP – Data storage

MAP – Map (usually constructed with BUILD.EXE)

Diablo Engine – Formats used by Diablo by Blizzard Entertainment.

SV – Save Game

ITM – Item File

Real Virtuality Engine – Formats used by Bohemia Interactive. Operation:Flashpoint, ARMA 2, VBS2

SQF – Format used for general editing

SQM – Format used for mission files

PBO – Binarized file used for compiled models

LIP – Format that is created from WAV files to create in-game accurate lip-synch for character animations.

Source Engine – Formats used by Valve. Half-Life 2, Counter-Strike: Source, Day of Defeat: Source, Half-Life 2: Episode One, Team Fortress 2, Half-Life 2: Episode Two, Portal, Left 4 Dead, Left 4 Dead 2, Alien Swarm, Portal 2, Counter-Strike: Global Offensive, Titanfall, Insurgency, Titanfall 2, Day of Infamy

VMF – Valve Hammer Map editor raw map file

VMX – Valve Hammer Map editor backup map file

BSP – Source Engine compiled map file

MDL – Source Engine model format

SMD – Source Engine uncompiled model format

PCF – Source Engine particle effect file

HL2 – Half-Life 2 save format

DEM – Source Engine demo format

VPK – Source Engine pack format

VTF – Source Engine texture format

VMT – Source Engine material format.

Pokemon Generation V

CGB – Pokemon Black and White/Pokemon Black 2 and White 2 C-Gear skins.

Other Formats

ARC – used to store New Super Mario Bros. Wii level data

B – used for Grand Theft Auto saved game files

BOL – used for levels on Poing!PC

DBPF – The Sims 2, DBPF, Package

DIVA – Project DIVA timings, element coΓΆrdinates, MP3 references, notes, animation poses and scores.

ESM, ESP – Master and Plugin data archives for the Creation Engine

HAMBU – format used by the Aidan’s Funhouse game RGTW for storing map data[24]

HE0, HE2, HE4 HE games File

GCF – format used by the Steam content management system for file archives

IMG – format used by Renderware-based Grand Theft Auto games for data storage

LOVE – format used by the LOVE2D Engine[25]

MAP – format used by Halo: Combat Evolved for archive compression, DoomΒ³, and various other games

MCA – format used by Minecraft for storing data for in-game worlds[26]

NBT – format used by Minecraft for storing program variables along with their (Java) type identifiers

OEC – format used by OE-Cake for scene data storage

OSB – osu! storyboard data

OSC – osu!stream combined stream data

OSF2 – free osu!stream song file

OSR – osu! replay data

OSU – osu! beatmap data

OSZ2 – paid osu!stream song file

P3D – format for panda3d by Disney

PLAGUEINC – format used by Plague Inc. for storing custom scenario information[27]

POD – format used by Terminal Reality

RCT – Used for templates and save files in RollerCoaster Tycoon games

REP – used by Blizzard Entertainment for scenario replays in StarCraft.

Simcity 4, DBPF (.dat, .SC4Lot, .SC4Model) – All game plugins use this format, commonly with different file extensions

SMZIP – ZIP-based package for StepMania songs, themes and announcer packs.

SOLITAIRETHEME8 – A solitaire theme for Windows solitaire

USLD – format used by Unison Shift to store level layouts.

VVVVVV – format used by VVVVVV

CPS – format used by The Powder Toy, Powder Toy save

STM – format used by The Powder Toy, Powder Toy stamp

PKG – format used by Bungie for the PC Beta of Destiny 2, for nearly all the game’s assets.

CHR – format used by Team Salvato, for the character files of Doki Doki Literature Club!

Z5 – format used by Z-machine for story files in interactive fiction.

scworld – format used by Survivalcraft to store sandbox worlds.

scskin – format used by Survivalcraft to store player skins.

scbtex – format used by Survivalcraft to store block textures.

prison – format used by Prison Architect to save prisons

escape – format used by Prison Architect to save escape attempts

Video game storage media[edit]

List of the most common filename extensions used when a game’s ROM image or storage medium is copied from an original read-only memory (ROM) device to an external memory such as hard disk for back up purposes or for making the game playable with an emulator.

In the case of cartridge-based software, if the platform specific extension is not used then filename extensions “.rom” or “.bin” are usually used to clarify that the file contains a copy of a content of a ROM. ROM, disk or tape images usually do not consist of one file or ROM, rather an entire file or ROM structure contained within one file on the backup medium.[28]

A26 – Atari 2600 (.a26)

A52 – Atari 5200 (.a52)

A78 – Atari 7800 (.a78)

LNX – Atari Lynx (.lnx)

JAG,J64 – Atari Jaguar (.jag, .j64)

ISO, WBFS, WAD, WDF – Wii and WiiU (.iso, .wbfs, .wad, .wdf)

GCM, ISO – GameCube (.gcm, .iso)

min – Pokemon mini (.min)

NDS – Nintendo DS (.nds)

3DS – Nintendo 3DS (.3ds)

CIA – Installation File (.cia)

GB – Game Boy (.gb) (this applies to the original Game Boy and the Game Boy Color)

GBC – Game Boy Color (.gbc)

GBA – Game Boy Advance (.gba)

GBA – Game Boy Advance (.gba)

SAV – Game Boy Advance Saved Data Files (.sav)

SGM – Visual Boy Advance Save States (.sgm)

N64, V64, Z64, U64, USA, JAP, PAL, EUR, BIN – Nintendo 64 (.n64, .v64, .z64, .u64, .usa, .jap, .pal, .eur, .bin)

PJ – Project 64 Save States (.pj)

NES – Nintendo Entertainment System (.nes)

FDS – Famicom Disk System (.fds)

JST – Jnes Save States (.jst)

FC? – FCEUX Save States (.fc#, where # is any character, usually a number)

GG – Game Gear (.gg)

SMS – Master System (.sms)

SG – SG-1000 (.sg)

SMD,BIN – Mega Drive/Genesis (.smd or .bin)

32X – Sega 32X (.32x)

SMC,078,SFC – Super NES (.smc, .078, or .sfc) (.078 is for split ROMs, which are rare)

FIG – Super Famicom (Japanese releases are rarely .fig, above extensions are more common)

SRM – Super NES Saved Data Files (.srm)

ZST – ZSNES Save States (.zst, .zs1-.zs9, .z10-.z99)

FRZ – Snes9X Save States (.frz, .000-.008)

PCE – TurboGrafx-16/PC Engine (.pce)

NPC, NGP – Neo Geo Pocket (.npc, .ngp)

NGC – Neo Geo Pocket Color (.ngc)

VB – Virtual Boy (.vb)

INT – Intellivision (.int)

MIN – PokΓ©mon Mini (.min)

VEC – Vectrex (.vec)

BIN – OdysseyΒ² (.bin)

WS – WonderSwan (.ws)

WSC – WonderSwan Color (.wsc)

TZX – ZX Spectrum (.tzx) (for exact copies of ZX Spectrum games)

TAP – for tape images without copy protection

Z80,SNA – (for snapshots of the emulator RAM)

DSK – (for disk images)

TAP – Commodore 64 (.tap) (for tape images including copy protection)

T64 – (for tape images without copy protection, considerably smaller than .tap files)

D64 – (for disk images)

CRT – (for cartridge images)

ADF – Amiga (.adf) (for 880K diskette images)

ADZ – GZip-compressed version of the above.

DMS – Disk Masher System, previously used as a disk-archiving system native to the Amiga, also supported by emulators.

Virtual machines[edit]

Microsoft Virtual PC, Virtual Server[edit]

VFD – Virtual Floppy Disk (.vfd)

VHD – Virtual Hard Disk (.vhd)

VUD – Virtual Undo Disk (.vud)

VMC – Virtual Machine Configuration (.vmc)

VSV – Virtual Machine Saved State (.vsv)

EMC VMware ESX, GSX, Workstation, Player[edit]

.

LOG – Virtual Machine Logfile (.log)

.

VMDK, DSK – Virtual Machine Disk (.vmdk, .dsk)

NVRAM – Virtual Machine BIOS (.nvram)

VMEM – Virtual Machine paging file (.vmem)

VMSD – Virtual Machine snapshot metadata (.vmsd)

VMSN – Virtual Machine snapshot (.vmsn)

VMSS,STD – Virtual Machine suspended state (.vmss, .std)

VMTM – Virtual Machine team data (.vmtm)

VMX,CFG – Virtual Machine configuration (.vmx, .cfg)

VMXF – Virtual Machine team configuration (.vmxf)

VirtualBox[edit]

VDI – VirtualBox Virtual Disk Image (.vdi)

Vbox-extpack – VirtualBox extension pack. (.vbox-extpack)

Parallels Workstation[edit]

HDD – Virtual Machine hard disk (.hdd)

PVS – Virtual Machine preferences/configuration (.pvs)

SAV – Virtual Machine saved state (.sav)

QEMU[edit]

COW – Copy-on-write

QCOW – QEMU copy-on-write Qcow

QCOW2 – QEMU copy-on-write – version 2 Qcow

QED – QEMU enhanced disk format

Web page[edit]

Static

DTD – Document Type Definition (standard), MUST be public and free

HTML (.html, .htm) – HyperText Markup Language

XHTML (.xhtml, .xht) – eXtensible HyperText Markup Language

MHTML (.mht, .mhtml) – Archived HTML, store all data on one web page (text, images, etc.) in one big file

MAF (.maff) – web archive based on ZIP

Dynamically generated

ASP (.asp) – Microsoft Active Server Page

ASPX – (.aspx) – Microsoft Active Server Page. NET

ADP – AOLserver Dynamic Page

BML – (.bml) – Better Markup Language (templating)

CFM – (.cfm) – ColdFusion

CGI – (.cgi)

iHTML – (.ihtml) – Inline HTML

JSP – (.jsp) JavaServer Pages

Lasso – (.las, .lasso, .lassoapp) – A file created or served with the Lasso Programming Language

PL – Perl (.pl)

PHP – (.php, .php?, .phtml) – ? is version number (previously abbreviated Personal Home Page, later changed to PHP: Hypertext Preprocessor)

SSI – (.shtml) – HTML with Server Side Includes (Apache)

SSI – (.stm) – HTML with Server Side Includes (Apache)

Markup languages and other web standards-based formats[edit]

Atom – (.atom, .xml) – Another syndication format.

EML – (.eml) – Format used by several desktop email clients.

JSON-LD – (.jsonld) – A JSON-based serialization for linked data.

KPRX – (.kprx) – A XML-based serialization for workflow definition generated by K2.

PS – (.ps) – A XML-based serialization for test automation scripts called PowerScripts for K2 based applications.

Metalink – (.metalink, .met) – A format to list metadata about downloads, such as mirrors, checksums, and other information.

RSS – (.rss, .xml) – Syndication format.

Markdown – (.markdown, .md) – Plain text formatting syntax, which is popularly used to format “readme” files.

Shuttle – (.se) – Another lightweight markup language.

Other[edit]

AXD – cookie extensions found in temporary internet folder

BDF – Binary Data Format – raw data from recovered blocks of unallocated space on a hard drive

CBP – CD Box Labeler Pro, CentraBuilder, Code::Blocks Project File, Conlab Project

CEX – SolidWorks Enterprise PDM Vault File

COL – Nintendo GameCube proprietary collision file (.col)

CREDX – CredX Dat File

DDB – Generating code for Vocaloid singers voice (see .DDI)

DDI – Vocaloid phoneme library (Japanese, English, Korean, Spanish, Chinese, Catalan)

DUPX – DuupeCheck database management tool project file

FTM – Family Tree Maker data file

FTMB – Family Tree Maker backup file

GA3 – Graphical Analysis 3

GEDCOM (.ged) – (GEnealogical Data COMmunication) format to exchange genealogy data between different genealogy software

HLP – Windows help file

IGC – flight tracks downloaded from GPS devices in the FAI’s prescribed format

INF – similar format to INI file; used to install device drivers under Windows, inter alia.

JAM – JAM Message Base Format for BBSes

KMC – tests made with KatzReview’s MegaCrammer

KCL – Nintendo GameCube/Wii proprietary collision file (.kcl)

LNK – Microsoft Windows format for Hyperlinks to Executables

LSM – LSMaker script file (program using layered .jpg to create special effects; specifically designed to render lightsabers from the Star Wars universe) (.lsm)

NARC – Archive format used in Nintendo DS games.

OER – AU OER Tool, Open Educational Resource editor

PA – Used to assign sound effects to materials in KCL files (.pa)

PIF – Used to run MS-DOS programs under Windows

POR – So called “portable” SPSS files, readable by PSPP

PXZ – Compressed file to exchange media elements with PSALMO

RISE – File containing RISE generated information model evolution

TOPC – TopicCrunch SEO Project file holding keywords, domain and search engine settings (ASCII)

VPROJ – VSDC Video Editor file

XLF – Utah State University Extensible LADAR Format

XMC – Assisted contact lists format, based on XML and used in kindergartens and schools

ZED – My Heritage Family Tree

Zone file – a text file containing a DNS zone

Cursors[edit]

ANI – Animated cursor

CUR – Cursor file

Smes – Hawk’s Dock configuration file

Generalized files[edit]

General data formats[edit]

These file formats are fairly well defined by long-term use or a general standard, but the content of each file is often highly specific to particular software or has been extended by further standards for specific uses.

Text-based[edit]
CSV – comma-separated values
HTML – hyper text markup language
CSS – cascading style sheets
INI – a configuration text file whose format is substantially similar between applications
JSON – JavaScript Object Notation is an openly used data format now used by many languages, not just JavaScript
TSV – tab-separated values
XML – an open data format
YAML – an open data format
ReStructuredText – an open text format for technical documents used mainly in the Python programming language
Markdown (.md) – an open lightweight markup language to create simple but rich text, often used to format README files
AsciiDoc – an open human-readable markup document format semantically equivalent to DocBook
Generic file extensions[edit]
These are filename extensions and broad types reused frequently with differing formats or no specific format by different programs

.

Binary files[edit]

Bak file (.bak, .bk) –

various backup formats: some just copies of data files, some in application-specific data backup formats, some formats for general file backup programs

BIN – binary data, often memory dumps of executable code or data to be re-used by the same software that originated it

DAT – data file, usually binary data proprietary to the program that created it, or an MPEG-1 stream of Video CD

DSK – file representations of various disk storage images

RAW – raw (unprocessed) data

Text files[edit]

configuration file (.cnf, .conf, .cfg) – substantially software-specific

logfiles (.log) – usually text, but sometimes binary

plain text (.asc or .txt) – human-readable plain text, usually no more specific

Partial files[edit]

Differences and patches[edit]

diff – text file differences created by the program diff and applied as updates by patch

Incomplete transfers[edit]

!UT (.!ut) – partly complete uTorrent download

.

CRDOWNLOAD (.crdownload) –

partly complete Google Chrome download

.

OPDOWNLOAD (.opdownload) – partly complete Opera download

PART (.part) – partly complete Mozilla Firefox or Transmission download

PARTIAL (.partial) – partly complete Internet Explorer or Microsoft Edge download

Temporary files[edit]

Temporary file (.temp, .tmp, various others) – sometimes in a specific format, but often just raw data in the middle of processing

Pseudo-pipeline file – used to simulate a software pipe

See also[edit]

List of filename extensions

MIME#Content-Type, a standard for referring to file formats

List of motion and gesture file formats

List of file signatures, or “magic numbers”

References[edit]

^ “Filename extension definition”. The Linux Information Project. Retrieved 1 February 2019.

^ “What Is a Cabinet (.cab) File?”. microsoft.com. Microsoft.

^ Jump up to: a b “3D printing with Windows 10”. microsoft.com. Microsoft.

^ “www.datacad.com – DataCAD Revision History”. datacad.com.

^ “How to export a design in Fusion 360”. Knowledge.autodesk.com. Retrieved 4 August 2019.

^ “Reagency Systems – easyOFFER the OREA and TREB real estate forms software solution details”. reagency.ca.

^ “GML Format”. gephi.org.

^ “Create, manage, and import swatches in InDesign”. Helpx.adobe.com. Retrieved 24 September 2018.

^ “Swatch Book – Inkscape Wiki”. Wiki.inkscape.org. Retrieved 24 September 2018.

^ “Palette Docker – Krita Manual version 4.1”. Docs.krita.org. Retrieved 24 September 2018.

^ “v1.2 Palette Β· mypaint/mypaint Wiki”. GitHub.com. Retrieved 24 September 2018.

^ “Index of /pdf/perq/accent_S5/Accent_UsersManual_1984”. Bitsavers.org. Retrieved 4 August 2019.

^ Jump up to: a b RSTS-11 System Users Guide (PDF) (DEC-11-ORSUA-D-D (RSTS/E V06A-02) ed.). Digital Equipment Corporation. 1975. pp. 2–16–2–17. Retrieved 22 March 2011.

^ “Archived copy” (PDF). Archived from the original (PDF) on 15 December 2017. Retrieved 24 March 2018.CS1 maint: archived copy as title (link)

^ Jump up to: a b c “Setting Up and Using PuTTY”. Wipo.int.

^ Jump up to: a b c [1]

^ Jump up to: a b c Leo Notenboom. “How do I create and use Public Keys with SSH?”

^ Jump up to: a b Jayasooriya, Tarith (16 September 2020). “nSign”. nsign. Retrieved 12 October 2020.

^ “SAC Data File Format”. Incorporated Research Institutions for Seismology.

^ “Standard for the Exchange of Earthquake Data” (PDF). Data Formats. IRIS (Incorporated Research Institutions for Seismology). Retrieved 5 May 2016.

^ “What is WIN system?” (in Japanese). Earthquake Observation Center, Earthquake Research Institute, U. Tokyo, Japan. Archived from the original on 2 April 2016. Retrieved 5 May 2016.

^ “TAK”. hydrogenaud.io.

^ Tim Fisher. “BRSTM File (What It Is & How To Open One)”. About.com Tech.

^ “HAMBU File Extension – What is a .hambu file and how do I open it?”. fileinfo.com. Retrieved 17 July 2020.

^ love2d.org

^ “MCA File Extension”. FileInfo.com. Retrieved 26 December 2018.

^ “FileInfo information about PLAGUEINC file format”.

^ “.GCM file extension! [Archive] – EmuTalk.net”. emutalk.net

.

external links

File formats at

Curlie

.

.ITHMB FILES

.

*iPHONE/(iPOD?) THUMBNAILS*

(cannot be copied from [external hard drive] to [macbook])

(in β€œiPod Photo Cache”)

.

.

*πŸ‘¨β€πŸ”¬πŸ•΅οΈβ€β™€οΈπŸ™‡β€β™€οΈ*SKETCHES*πŸ™‡β€β™‚οΈπŸ‘©β€πŸ”¬πŸ•΅οΈβ€β™‚οΈ*

.

πŸ“šπŸ“–|/\-*WIKI-LINK*-/\|πŸ“–πŸ“š

.

.

πŸ‘ˆπŸ‘ˆπŸ‘ˆβ˜œ*-COMPUTERS-* ☞ πŸ‘‰πŸ‘‰πŸ‘‰

.

.

πŸ’•πŸ’πŸ’–πŸ’“πŸ–€πŸ’™πŸ–€πŸ’™πŸ–€πŸ’™πŸ–€β€οΈπŸ’šπŸ’›πŸ§‘β£οΈπŸ’žπŸ’”πŸ’˜β£οΈπŸ§‘πŸ’›πŸ’šβ€οΈπŸ–€πŸ’œπŸ–€πŸ’™πŸ–€πŸ’™πŸ–€πŸ’—πŸ’–πŸ’πŸ’˜

.

.

*🌈✨ *TABLE OF CONTENTS* ✨🌷*

.

.

πŸ”₯πŸ”₯πŸ”₯πŸ”₯πŸ”₯πŸ”₯*we won the war* πŸ”₯πŸ”₯πŸ”₯πŸ”₯πŸ”₯πŸ”₯