List of file formats

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 afterward is the extension.[1]

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

Archive and compressed

  • .?Q? – files that are compressed, often by the SQ program.
  • 7z – 7-Zip compressed file
  • AAPKG – ArchestrA IDEDetails
  • AAC – Advanced Audio Coding
  • ace – ACE compressed file
  • ALZ – ALZip compressed file
  • APK – Applications installable on Android
  • APPX – Microsoft Application Package (.appx)
  • AT3 – Sony's UMD data compression
  • .bke – data compression
  • ARC – pre-Zip data compression
  • 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 a little 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
  • CLIPFLAIR (.clipflair, – ClipFlair Studio ClipFlair component saved state file (contains component options in XML, extra/attached files and nested components' state in child 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
  • debDebian 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.
  • 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 . 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 , Viewplot Welcome to ...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
  • 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 – Mine HTML (Hyper-Text Markup Language) code file
  • MPQ Archives (.mpq) – Used by Blizzard Entertainment
  • BIN (.bin) – MacBinary
  • NTH (.nth) – Nokia Theme Used by Nokia Series 40 Cellphones
  • OAR (.oar) – OmegaARc Archive
  • OSZ – osu! compressed 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 Doom³)
  • PK4 (.pk4) – Doom³ 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
  • 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/SISXSymbian 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
  • TAR – group of files, packaged as one file
  • TGZ (.tar.gz) – gzipped tar file
  • 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

  • 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.
  • MDSDAEMON 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

Ceramics glaze recipes

File formats for software, databases, and websites used by potters and ceramic artists to manage glaze recipes, glaze chemistry, etc.

Computer-aided design

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)

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

  • 3DXML – Dassault Systemes graphic representation
  • 3MFMicrosoft 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
  • DGNMicroStation 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
  • IFCbuildingSMART for sharing AEC and FM data
  • IGES – Initial Graphics Exchange Specification
  • Intergraph Standard File FormatsIntergraph
  • IPN – Autodesk Inventor Presentation file
  • IPT – Autodesk Inventor Part file
  • JT – Jupiter Tesselation
  • MCD – Monu-CAD (Monument/Headstone Drawing file)
  • 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)

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

Test technology

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


Desktop publishing


These files store formatted text and plain text.

Financial records

Financial data transfer formats

Font file

Geographic information system

  • 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
  • ITNTomTom 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
  • KMLKeyhole Markup Language, XML-based

Graphical information organizers

  • 3DT3D 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
  • ATY3D 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)
  • CAGLinear Reference System
  • FES3D 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
  • MMFreeMind mind map file (XML)
  • MMPMind Manager mind map file
  • TPC3D 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)


Color palettes

  • 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

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

Raster graphics

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

Vector graphics

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
  • AIAdobe 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
  • 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 – XML (obsolete) Drawing
  • 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

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


Object code, executable files, shared and dynamically linked libraries

  • .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
  • DCUDelphi 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
  • .XPIPKZIP 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
  • .s1esExecutable 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

Personal information manager


Project management software

Reference management software

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

Scientific data (data exchange)

  • 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



  • 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.




Biomedical imaging

Biomedical signals (time series)

  • 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

  • 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

  • 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


Authentication and general encryption formats are listed here.

Certificates and keys


Encrypted files

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

Password files

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)

  • 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[18]
  • SCP-ECG – Standard Communication Protocol for Computer assisted electrocardiography
  • SEED, MSEED – Standard for the Exchange of Earthquake Data, seismological data and sensor metadata[19]
  • SEGYReflection seismology data format
  • SIGIF – SIGnal Interchange Format
  • WIN, WIN32 – NIED/ERI seismic data format (.cnt)[20]

Sound and music

Lossless audio


  • 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
  • RAW – Raw samples without any header or sync
  • WAV – Microsoft Wave


Lossy audio

Sheet music files

  • LY – LilyPond sheet music file
  • MUS, MUSX – Finale sheet music file
  • MXL, XML – MusicXML standard sheet music exchange format
  • MSCX, MSCZ – MuseScore sheet music file
  • SIB – Sibelius sheet music file

Other file formats pertaining to audio

Playlist formats

Audio editing and music production

Recorded television formats

Source code for computer programs

  • 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#,, 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 – M² 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
  • pisrc − PiNET source code mains. Used with Python 3.0, Snap!, and UnrealEngine 4 files source- used by PiIT, Dangerous_Pi, and Silicon Alchemy
  • 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


Tabulated data


  • 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
  • CAMaMSN 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-MSWindows 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
  • 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
  • SWFMacromedia Flash (for viewing)
  • WMV – Windows Media Video (See ASF)
  • WTVWindows 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

Video game data

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

  • 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.
    • 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
    • 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.
  • Other Formats
    • 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 coördinates, MP3 references, notes, animation poses and scores.
    • ESM, ESP – Master and Plugin data archives for the Creation Engine
    • 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[24]
    • MAP – format used by Halo: Combat Evolved for archive compression, Doom³, and various other games
    • MCA – format used by Minecraft for storing data for in-game worlds[25]
    • MCADDON – format used by the Windows 10 Edition of Minecraft for add-ons
    • 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 Windows 10 Edition of Minecraft for in-game texture packs
    • MCR – format used by Minecraft for storing data for in-game worlds before version 1.2
    • MCTEMPLATE – format used by the Windows 10 Edition of Minecraft for world templates
    • MCWORLD – format used by the Windows 10 Edition of Minecraft for in-game worlds
    • 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
    • OSK – osu! compressed skin data
    • OSR – osu! replay data
    • OSU – osu! beatmap data
    • P3D – format for panda3d by Disney
    • 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.
    • USLD – format used by Unison Shift to store level layouts.
    • VVVVVV – format used by VVVVVV[26]
    • 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.

Video game storage media

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.[27]

  • CIA – Installation File (.cia)
  • N64, V64, Z64, U64, USA, JAP, PAL, EUR, BIN – Nintendo 64 (.n64, .v64, .z64, .u64, .usa, .jap, .pal, .eur, .bin)
  • FDS – Famicom Disk System (.fds)
  • JST – Jnes Save States (.jst)
  • FC? – FCEUX Save States (.fc#, where # is any character, usually a number)
  • 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)
  • 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

Microsoft Virtual PC, Virtual Server

  • 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

  • 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)


  • VDI – VirtualBox Virtual Disk Image (.vdi)
  • Vbox-extpack – VitualBox extension pack. (.vbox-extpack)

Parallels Workstation

  • HDD – Virtual Machine hard disk (.hdd)
  • PVS – Virtual Machine preferences/configuration (.pvs)
  • SAV – Virtual Machine saved state (.sav)


  • 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

  • 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)
    • RNA – (.rna) – Real Native Application File
    • R – (.r) – Real Native Application File (short alternative)
    • RNX – (.rnx) – Real Native Application File (using experimental version 6 of RNA/Karbon Language)
    • SSI – (.shtml) – HTML with Server Side Includes (Apache)
    • SSI – (.stm) – HTML with Server Side Includes (Apache)

Markup languages and other web standards-based formats

  • 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
  • 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) – A light-weight, plain-text, easy to read and write markup language.
  • Shuttle – (.se) – lightweight markup language


  • 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[28]
  • 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);
  • TOS – Character file from The Only Sheet
  • 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


  • ANI – Animated cursor
  • CUR – Cursor file
  • Smes – Hawk's Dock configuration file

Generalized files

General data formats

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.


Generic file extensions

These are filename extensions and broad types reused frequently with differing formats or no specific format by different programs.

Binary files

  • 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
  • DSK – file representations of various disk storage images
  • RAW – raw (unprocessed) data

Text files

Partial files

Differences and patches

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

Incomplete transfers

Temporary files

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

See also


  1. "Filename extension definition". The Linux Information Project. Retrieved 1 February 2019.
  2. "What Is a Cabinet (.cab) File?". Microsoft.
  3. "3D printing with Windows 10". Microsoft.
  4. " – DataCAD Revision History".
  5. "How to export a design in Fusion 360". Retrieved 4 August 2019.
  6. "Reagency Systems – easyOFFER the OREA and TREB real estate forms software solution details".
  7. "GML Format".
  8. "Create, manage, and import swatches in InDesign". Retrieved 24 September 2018.
  9. "Swatch Book – Inkscape Wiki". Retrieved 24 September 2018.
  10. "Palette Docker – Krita Manual version 4.1". Retrieved 24 September 2018.
  11. "v1.2 Palette · mypaint/mypaint Wiki". Retrieved 24 September 2018.
  12. "Index of /pdf/perq/accent_S5/Accent_UsersManual_1984". Retrieved 4 August 2019.
  13. 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.
  14. "Setting Up and Using PuTTY".
  15. Leo Notenboom. "How do I create and use Public Keys with SSH?"
  16. "SAC Data File Format". Incorporated Research Institutions for Seismology.
  17. "Standard for the Exchange of Earthquake Data" (PDF). Data Formats. IRIS (Incorporated Research Institutions for Seismology). Retrieved 5 May 2016.
  18. "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.
  19. "TAK".
  20. Tim Fisher. "BRSTM File (What It Is & How To Open One)". Tech.
  21. Computer Knowledge. "File Extension .AST Details".
  23. "MCA File Extension". Retrieved 26 December 2018.
  24. Computer Knowledge. "File Extension .VVVVVV Details".
  25. ".GCM file extension! [Archive] –".
  26. Computer Knowledge. "File Extension .CBP Details". Archived from the original on 28 July 2009. Retrieved 26 July 2009. 090707
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