List of filename extensions (A–E)
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This alphabetical list of filename extensions contains extensions of notable file formats used by multiple notable applications or services.
A
[edit]Ext. | Description | Used by |
---|---|---|
A | Archive file | ar (Unix) |
AAC | Advanced Audio Coding file | iOS, Nintendo DSi, Nintendo 3DS, YouTube Music |
ACCDB[1] | Microsoft Access Database | Microsoft Access Database (Open XML) |
ACCFT[2] | Microsoft Access Data Type Template | Microsoft Access |
ACO | Adobe color palette format (.aco)[3] | Adobe Photoshop[4] |
ADT | Abrechnungsdatentransfer, an xDT application | Healthcare providers in Germany |
ADX | Document | Archetype Designer |
ADZ | Amiga Disk Zipped (See Amiga Disk File) | GZip |
AGDA | Agda (programming language) source file | Agda typechecker/compiler |
AGR | ArcView ASCII grid | |
AHK | AutoHotkey script file | AutoHotkey |
AI[5] | Adobe Illustrator Artwork | Adobe Illustrator |
AIFF[6] | Audio Interchange File Format | professional audio processing applications and on Macintosh[7] |
AIFC[6] | Compressed Audio Interchange File Format | |
AIO | APL programming language file transfer format file | |
AMF[8][9] | Additive Manufacturing File Format | Computer Aided Design Software |
AMG | System image file | ACTOR |
AML[10] | AutomationML | AutomationML Group |
AMLX[10] | Compressed and packed AutomationML file | AutomationML Group |
AMPL | AMPL source code file | AMPL |
AMR | Adaptive Multi-Rate audio | |
AMV | Actions Media Video | |
ANI[11] | Animation cursors for Win | Win95 - WinNT |
ANN | Annotations of old Windows Help file | Windows 3.0 - XP |
APE | Monkey's Audio (Lossless) | audio media players |
APK | Android application package | Android |
APK | Alpine Linux Package | Alpine Linux and derivatives |
ARC[12] | ARC (file format) | |
ART[13] | Gerber format | Cadence Allegro, EAGLE |
ASAX[14] | ASP.NET global application file | |
ASCX[14] | ASP.NET User Control | |
ASF[15] | Advanced Streaming Format (Compressed Windows audio/video) | Microsoft Corporation |
ASHX[14] | ASP.NET handler file | |
ASM | Assembler language source | TASM, MASM, NASM, FASM |
ASPX | Active server page extended file | Microsoft Corporation |
ASX[16] | Advanced Stream Redirector file, redirects to an ASF file (see ASF) | Microsoft Corporation |
ATG[17] | Coco/R LL(1) formal grammar | Coco/R |
AT3[18] | Atrac 3 Sound/music file | All Sony devices and programs with the Atrac 3+ specification |
audio file[19] | ||
AVI[20][21] | Audio Video Interleave | Video for Windows |
AVIF | AV1 Image File Format | |
AWK | AWK script/program | awk, GNU Awk, mawk, nawk, MKS AWK, Awka (compiler) |
AX | DirectShow Filter | Microsoft Corporation (Video Players) |
AXF[22] | lightweight geodatabase | ESRI ArcPad |
B
[edit]Ext. | Description | Used by |
---|---|---|
B | BASIC language source | |
B | bc arbitrary precision calculator language file | Unix bc tool |
B64 | base64 binary-to-text encoding[23] | |
BAK | backup | various |
BAR | Broker Archive. Compressed file containing number of other files for deployment.[24] | IBM App Connect |
BAS | BASIC language source | QuickBASIC - GW-BASIC - FreeBASIC - others |
BAT | Batch file | MS-DOS, RT-11, DOS-based command processors |
BDF | Glyph Bitmap Distribution Format, a format used to store bitmap fonts. | Adobe |
BDT | Behandlungsdatentransfer, an xDT application | Healthcare providers in Germany |
BEAM | Executable bytecode file in fat binary format | BEAM (Erlang virtual machine)[25] |
BIB | Bibliography database | BibTex |
BIN | binary file | Every OS |
BLEND | Blender project file | Blender |
BM3 | UIQ3 Phone backup | |
BMP[26] | OS/2 or Win graphics format (BitMap Picture) | QPeg - CorelDraw - PC Paintbrush - many |
BPS | WPS backup file[27] | Microsoft Word, Microsoft Works |
BSON | JSON-like binary serialization[28] | MongoDB |
BSP | Binary space partitioning tree file | Quake-based game engines |
BYU | 3D geometry format[29] | |
BZ2[30] | Archive | bzip2 |
C
[edit]Ext. | Description | Used by |
---|---|---|
C-- | C-- language source | Sphinx C-- |
C | C language source Note that on case-sensitive platforms like Unix and with the gcc compiler the uppercase .C extension indicates a C++ source file.[31] |
Watcom C/C++, Borland C/C++, gcc and other C compilers |
C | Unix file archive | COMPACT |
C++ | C++ language source | |
CPP | C++ language source | |
Config | Configuration file | |
C32 | COMBOOT Executable (32-bit) | SYSLINUX |
CAB[32] | Cabinet archive | Windows 95 and later, many file archivers |
CBL[33] | COBOL language source | |
CBT | COMBOOT Executable (incompatible with DOS COM files) | SYSLINUX |
CC | C++ language source | |
CD | ASP.NET class diagram file[14] | |
CDF[34] | Common Data Format | |
CDF[35] | Computable Document Format | Mathematica |
CDP[36] | Trainz Railroad Simulator Content Dispatcher Pack | Trainz Railroad Simulator |
CDR[37] | Vector graphics format (drawinF | CorelDraw |
CDXML | MIME type: chemical/x-cdxmlXML version of the ChemDraw Exchange format, CDX.[38] | |
CER[39] | Security certificate | Microsoft Windows |
CGM[40][41] | Computer Graphics Metafile vector graphics | A&L - HG - many |
CHM[42] | Compiled Help File | Microsoft Windows, Help Explorer Viewer |
CHO[43] | ChordPro lead sheet (lyrics and chords) | ChordPro and similar tools |
CIA | Decrypted Nintendo 3DS ROM cartridge | Nintendo 3DS |
CIF[44][45] | Crystallographic Information File | RasMol, Jmol |
CLASS[46] | Java class file | Java |
CLS | ooRexx class file | ooRexx |
CMD | Command Prompt batch file | Microsoft Windows NT based operating systems |
CMD[47] | executable programs | CP/M-86 operating system |
CML | Chemical Markup Language, for interchange of chemical information.[48] | |
CMOD[49] | Celestia Model | Celestia |
CN1[50] | CNR IDL | MITRE |
CNOFF | 3D object file format with normals (.noff, .cnoff)[51] NOFF is an acronym derived from Object File Format. Occasionally called CNOFF if color information is present.[52] | |
COB[53] | COBOL language source | GnuCOBOL |
COE[54] | Coefficient file | Xilinx ISE |
COFF | 3D object file format (.off, .coff)[55] OFF is an acronym for Object File Format. Used for storing and exchanging 3D models. Occasionally called COFF if color information is present.[56] | |
COL | DIMACS graph data format.[57] | |
COM | DOS program | DOS- |
COMPILE[14] | ASP.NET precompiled stub file | |
CPC[58] | Compressed image | Cartesian Perceptual Compression |
CPIO | cpio archive file | cpio |
CPL[59] | Control panel file | Windows 3.x |
CPY[53] | COBOL source copybook file | |
CR2[60] | Raw image format | Canon digital cameras |
CR3[61] | Raw image format | Canon R series cameras |
CRAI[62] | CRAM index | |
CRAFT | Holds Spacecraft Assembly information | Kerbal Space Program |
CRT[39] | Security certificate | Microsoft Windows |
CS[63] | C# language source | |
CSPROJ[64][65] | C# project file | Microsoft Visual Studio |
CSS[66] | Cascading style sheet | |
CSO[67] | Compiled Shader Object, extension of compiled HLSL | High-Level Shading Language |
CSV[68] | Comma Separated Values text file format (ASCII) | |
CUB | Used by electronic structure programs to store orbital or density values on a three-dimensional grid.[69] | |
CUBE | same as .cub | |
CUR | Non-animated cursor (extended from ICO) | Windows |
D
[edit]Ext. | Description | Used by |
---|---|---|
D | D Programming Language source file | DMD |
D | Directory containing configuration files (informal standard) | Unix |
DAA | Direct Access Archive | |
DAE | COLLADA file | |
DAF | Data file | Digital Anchor |
DART | Dart (programming language) source file | |
DAT | AMPL data file | AMPL |
DAT | LDraw (Sub)Part File, 3D Model | LDraw |
DAT | Data | RSNetWorx Project |
DAT | Data file in special format or ASCII | |
DAT | Database file | Clarion (programming language) |
DAT | Norton Utilities disc image data. It saves Boot sector, part of FAT and root directory in image.DAT on same drive. | Norton Utilities |
DAT | Optical disc image (can be ISO9660, but not restricted to) | cdrdao, burnatonce |
DAT | Video CD MPEG stream | |
DAT | Windows registry hive (REG.DAT Windows 3.11; USER.DAT and SYSTEM.DAT Windows 95, 98, and ME; NTUSER.DAT Windows NT/2000/XP/7) | Microsoft Windows |
DATS | Dynamic source | ATS |
DB | Database file | DB Browser for SQLite |
DBA | DarkBasic source code | |
DBC | Database Connection configuration file | AbInitio |
DBF | Native format of the dBASE database management application.[70] | |
DBG | Debugger script | DOS debug - Watcom debugger |
DBG | Symbolic debugging information | Microsoft C/C++ |
DEB | deb software package | Debian Linux and derivatives |
DEM | digital elevation model (DEM) including GTOPO30 and USGSDEM. GTOPO30 is a distribution format for a global digital elevation model (DEM) with 30-arc-second grid spacing.[71] USGSDEM is the standard format for the distribution of terrain elevation data for the United States.[72] | |
DGN | Bentley Systems, MicroStation and Intergraph's Interactive Graphics Design System (IGDS) | |
DICOM | Digital Imaging and Communications in Medicine (DICOM) bitmap | DICOM Software (XnView) |
DIF | Data Interchange Format | Visicalc |
DIF | Output from [diff] command - script for Patch command | |
DIRED | Directory listing (ls format) | Dired |
DIVX | DivX media format | |
DMG | Apple Disk Image | macOS (Disk Utility) |
DMP | memory dump file (e.g. screen or memory) | |
DN | Dimension model format | Adobe Dimension[73] |
DNG[74] | Digital Negative, a-publicly available archival format for the raw files generated by digital cameras | At least 30 camera models from at least 10 manufacturers, and at least 200 software products |
DOC[75][76][77] | A Document, or an ASCII text file with text formatting codes in with the text; used by many word processors | Microsoft Word and others |
DOCM | Microsoft Word Macro-Enabled Document | Microsoft Word |
DOCX[78] | Microsoft Word Document | Microsoft Word |
DOT[78] | Microsoft Word document template | Microsoft Word |
DOTX[78] | Office Open XML Text document template | Microsoft Word |
DPX[79][80] | Digital Picture Exchange | |
DRC | Dirac format video | |
DSC[81] | Celestia Deep Space Catalog file | Celestia |
DTA | Stata database transport format.[82] | Stata |
DTD[83] | Document Type Definition | |
DVC[84] | Data version control yaml pointer into blob storage | |
DWF | Autodesk Design Web Format | Design Review |
DWG[85] | Drawing | AutoCAD, IntelliCAD, PowerCAD, Drafix, DraftSight etc. |
DX | same as JDX and JCM. | |
DXF[86] | Drawing Interchange File Format vector graphics | AutoCAD, IntelliCAD, PowerCAD, etc. |
E
[edit]Ext. | Description | Used by |
---|---|---|
E | E language source code | E |
E## | EnCase Evidence File chunk | EnCase Forensic Analysis Suite entity |
E00 | ArcInfo interchange file | GIS software |
E2D | 2-dimensional vector graphics file | Editor included in JFire |
e57 | A file format developed by ASTM International for storing point clouds and images | Most software that enables viewing and/or editing of 3D point clouds |
EBD | versions of DOS system files (AUTOEXEC.BAT, COMMAND.COM, CONFIG.SYS, WINBOOT.SYS, etc.) for an emergency boot disk | Windows 98, ME |
EC | Source code | eC |
ECC | Error-checking file | dvdisaster |
EDE | Ensoniq EPS disk image | AWAVE |
EDF | European data format | Medical timeseries storage files |
EFI | Extensible Firmware Interface | |
EIS | EIS Spectrum Analyser Project | EIS Spectrum Analyser Archived 2010-03-29 at the Wayback Machine |
EL | Emacs Lisp source code file | Emacs |
ELC | Byte-compiled Emacs Lisp code | Emacs |
ELF | Executable and Linkable File
EurekaLog File (contains details of an exception) |
Unix
EurekaLog (https://www.eurekalog.com/) |
Outlook Express Email Message | Windows Live Mail, Outlook Express, Microsoft Notepad | |
EMAKER | E language source code (maker) | E |
EMF | Microsoft Enhanced Metafile | |
EML | Email conforming to RFC 5322;[87] Stationery Template | Email clients;Outlook Express |
EMZ | Microsoft Enhanced Metafile compressed with ZIP | Microsoft Office suite |
EOT | Embedded OpenType | |
EP | GUI wireframe/prototype project | Prikhi Pencil, Evolus Pencil |
EPA | Award BIOS splash screen | Award BIOS, XnView |
EPS | Encapsulated PostScript | CorelDraw - PhotoStyler - PMView - Adobe Illustrator - Ventua Publisher |
EPUB | Electronic Publication (e-Reader format) | Okular (Linux) - Apple Books - Sony Reader - Adobe Digital Editions - Calibre (LMW) |
EU4 | Europa Universalis 4 save game file | Europa Universalis 4 |
ERL | Erlang source code file | |
ES6 | ECMAScript 6 file | |
ESCPCB | Data file of "esCAD pcb", PCB Pattern Layout Design Software | esCAD pcb provided by Electro-System |
ESCSCH | Data file of "esCAD sch", Drawing Schematics Diagram Software | esCAD sch provided by Electro-System |
ESD | Windows Imaging Format | ImageX, DISM, 7-Zip, wimlib |
ETL | event trace log file | Microsoft[88][89] |
EVT | Windows Event log file | Microsoft Windows NT 4.0 - XP; Microsoft Event Viewer |
EVTX | Windows Event log file XML structured | Microsoft Windows Vista, 7, 8; Microsoft Event Viewer |
EX | Elixir source code file | Elixir programming language running on BEAM (Erlang virtual machine)[90] |
EXE | Directly executable program | DOS, OpenVMS, Microsoft Windows, Symbian or OS/2 |
EXP | Drawing File format | Drawing Express |
EXP | Melco Embroidery Format | Embroidermodder |
EXR | OpenEXR raster image format (.exr).[55] Used in digital image manipulation for theatrical film production. EXR is an acronym for Extended Dynamic Range. Stores 16 bit per pixel IEEE HALF-precision floating-point color channels. Can optionally store 32-bit IEEE floating-point "Z" channel depth-buffer components, surface normal directions, or motion vectors.[91] | |
EXS | Elixir script file | Interactive Elixir (IEx) shell[92] |
See also
[edit]References
[edit]- ^ "Which Access file format should I use?". microsoft.com. Retrieved 2020-09-13.
- ^ "Save and reuse database design elements". Retrieved 29 October 2015.
- ^ "Listing of All Formats".
- ^ "ACO (.aco)". Wolfram Language & System Documentation Center.
- ^ "What is a vector file?". adobe.com. Retrieved 2020-09-12.
- ^ a b Tom Erbe (1999). "AIFF-C Compression Types and Names". Archived from the original on 2006-06-20. Retrieved 2010-03-21.
- ^ "AIFF (.aif, .aiff, .aifc)".
- ^ Specification for Data Exchange Format for Additive Manufacturing
- ^ Specification of AMF on ISO web page
- ^ a b "AutomationML". AutomationML e. V. Retrieved 2020-09-13.
- ^ "About animated cursors". gdgsoft.com. Retrieved 2020-09-14.
- ^ Burner, Mike; Kale, Brewster (1996-09-15). "Arc File Format". Retrieved 2020-09-13.
- ^ "Gerber Format". ucamco.com. 2020-04-09. Retrieved 2020-09-13.
- ^ a b c d e ASP.NET Web Project File Types
- ^ "Overview of the ASF format". microsoft.com. 2018-05-31. Retrieved 2020-09-12.
- ^ "ASX Element". microsoft.com. 2018-05-31. Retrieved 2020-09-14.
- ^ "Coco/R own DSL grammar". github.com.
- ^ "ATRAC Developer's Interview". sony.net. Retrieved 2020-09-12.
- ^ "
AU (.au)". - ^ "AVI File Format with OpenDML Extensions, Version 1.02". www.loc.gov. 2016-03-09. Retrieved 2019-09-01.
- ^ stevewhims. "AVI RIFF File Reference - Windows applications". docs.microsoft.com. Retrieved 2019-09-01.
- ^ "The ArcPad Team Blog: What is an ArcPad AXF?".
- ^ "Base64 (.b64)".
- ^ "Deploying integration solutions". ibm.com. Retrieved 2021-05-18.
- ^ "The Erlang Runtime System". happi.github.io. Retrieved 2018-05-07.
- ^ "Bitmap Storage". microsoft.com. 2018-05-31. Retrieved 2020-09-12.
- ^ "BPS File Extension - What is a .bps file and how do I open it?". fileinfo.com. Retrieved 2018-10-12.
- ^ "BSON (.bson)".
- ^ "BYU (.byu)".
- ^ "BZIP2 Format Specification" (PDF). GitHub. 27 February 2022.
- ^ "Overall Options - Using the GNU Compiler Collection (GCC)". gcc.gnu.org. Retrieved 2020-06-27.
- ^ "Cabinet Files". microsoft.com. 2018-05-31. Retrieved 2020-09-13.
- ^ Coughlan, Michael (16 March 2014). Beginning COBOL for Programmers. Apress. p. 400. ISBN 978-1430262534. Retrieved 13 August 2014.
- ^ "What is Common Data Format (CDF)?". Retrieved 2020-09-13.
- ^ "Computable Document Format". wolfram.com. Retrieved 2020-09-12.
- ^ "CDP File - What is it and how do I open it?". file.org. Retrieved 2022-10-28.
- ^ "Trying to Open a .CDR File?". Retrieved 2020-09-12.
- ^ "CDXML (.cdxml)".
- ^ a b "Certificate extensions explained". digicert.com. Retrieved 2020-09-12.
- ^ IANA Image Media Types
- ^ ISO/IEC 8632
- ^ "Create a Help Project". 2018-05-31. Retrieved 2020-09-12.
- ^ "Welcome to ChordPro!". Retrieved 2020-09-12.
- ^ Hall SR, Allen FH, Brown ID (1991). "The Crystallographic Information File (CIF): a new standard archive file for crystallography". Acta Crystallographica Section A. 47 (6): 655–685. doi:10.1107/S010876739101067X.
- ^ Brown ID, McMahon B (2002). "CIF: the computer language of crystallography". Acta Crystallographica Section B: Structural Science. 58 (Pt 3 Pt 1): 317–24. doi:10.1107/s0108768102003464. PMID 12037350.
- ^ "The class File Format". oracle.com. Retrieved 2020-09-12.
- ^ Elliott, John C. "CP/M-86 executables (.CMD)". Seasip.info. Archived from the original on 2016-11-14. Retrieved 2016-08-29.
- ^ "CML (.cml)".
- ^ "Celestia's CMOD model format". Retrieved 2020-09-12.
- ^ "MITRE's Combat Net Radio Initialization File". Retrieved 2020-11-30.
- ^ "Listing of All Formats".
- ^ "NOFF (.noff, .cnoff)".
- ^ a b Cutler, Gary; Coen, Vincent (July 2020). "10.1. Compiling Programs". GnuCOBOL Programmer's Guide (3.1 RC-1 ed.).
- ^ "COE File Syntax". xilinx.com. 2009.
- ^ a b "Listing of All Formats".
- ^ "OFF (.off, .coff)".
- ^ "DIMACS (.col, .col.b)".
- ^ "Technical Overview of Cartesian Perceptual Compression". 1999. Retrieved 2020-09-13.
- ^ "Description of Control Panel (.cpl) Files". microsoft.com. 2020-08-19. Retrieved 2020-09-12.
- ^ "Understanding What is stored in a Canon RAW .CR2 file, How and Why". Retrieved 2020-09-12.
- ^ "Quick look: Canon's new compressed Raw format". DPReview. Retrieved 2023-07-15.
- ^ Hsi-Yang Fritz, Markus; Leinonen, Rasko; Cochrane, Guy; Birney, Ewan (May 2011). "Efficient storage of high throughput DNA sequencing data using reference-based compression". Genome Research. 21 (5): 734–740. doi:10.1101/gr.114819.110. ISSN 1549-5469. PMC 3083090. PMID 21245279.
- ^ "Introduction to projects and solutions". docs.microsoft.com. 2020-11-17. Retrieved 2021-05-06.
- ^ "Additions to the csproj format for .NET Core". microsoft.com. 2019-04-28. Retrieved 2020-09-12.
- ^ "Understanding the project file". microsoft.com. 2012-05-04.
- ^ "Cascading Style Sheets home page". w3.org. Retrieved 2020-09-12.
- ^ "Compiling shaders home page". w3.org. Retrieved 2023-03-28.
- ^ Shafranovich, Y. (October 2005). Common Format and MIME Type for CSV Files. IETF. p. 1. doi:10.17487/RFC4180. RFC 4180.
- ^ "Cube (.cub, .cube)".
- ^ "DBF (.dbf)".
- ^ "GTOPO30".
- ^ "USGSDEM (.dem)".
- ^ Adobe Dimension User Guide
- ^ "Digital Negative (DNG)". Adobe Systems Incorporated. Retrieved 2018-07-30.
- ^ Microsoft Office Binary (doc, xls, ppt) File Formats, 2008-02-15, archived from the original on 2008-02-18
- ^ "Microsoft Office Word 97 - 2007 Binary File Format Specification (*.doc)" (PDF). Microsoft Corporation. 2008.
- ^ MS-DOC: Word (.doc) Binary File Format, 2019-11-19, retrieved 2020-02-25
- ^ a b c "Word Extensions to the Office Open XML (.docx) File Format". 2020-08-18. Retrieved 2020-08-29.
- ^ ST 268-1:2014 - SMPTE Standard - File Format for Digital Moving-Picture Exchange (DPX). SMPTE. doi:10.5594/SMPTE.ST268-1.2014. ISBN 978-1-68303-083-6.
- ^ ST 268-2:2018 - SMPTE Standard - Digital Moving-Picture Exchange (DPX) – Format Extensions for High Dynamic Range and Wide Color Gamut. SMPTE. doi:10.5594/SMPTE.ST268-2.2018. ISBN 978-1-68303-161-1. S2CID 252588275.
- ^ "DSC Parameters recognized by Celestia v1.4.1 (and later)". Retrieved 2020-09-13.
- ^ "DTA (.dta)".
- ^ "Extensible Markup Language (XML) 1.0". w3.org (5 ed.). 2008-11-26. Retrieved 2020-09-13.
- ^ "Data Version Control".
- ^ "Open Design Specification for .dwg Files" (PDF). opendesign.com. Retrieved 2020-09-13.
- ^ "DXF Reference" (PDF). autodesk.com. February 2011. Retrieved 2020-09-13.
- ^ ".EML File Extension". Archived from the original on 2021-08-12. Retrieved 2022-01-10.
- ^
"Windows Event Trace Log Sink". Microsoft TechNet. Microsoft. 2005-06-20. Retrieved 2017-02-08.
The Event Trace Sink provided with the Microsoft Enterprise Instrumentation Framework (EIF) produces event trace log (.etl) files [...].
- ^
Compare: Rea, Sara Morgan (2005). Building Intelligent .NET Applications: Agents, Data Mining, Rule-based Systems, and Speech Processing. Addison-Wesley Microsoft Technology Series. Addison Wesley. p. 41. ISBN 9780321246264. Retrieved 2017-02-08.
Each call is logged to the Windows Event Trace Log and stored in a log file with an .etl (event log tracing) extension.
- ^ "Modules and functions". elixir-lang.github.com. Retrieved 2018-05-07.
- ^ "OpenEXR (.exr)".
- ^ "Erlang/Elixir Syntax: A Crash Course". elixir-lang.github.com. Retrieved 2018-05-07.