For further file extension descriptions you may look for e.g. at
and/orIf you have improvements or additions for the Fossies file extension description list or detect errors so please inform us.
| File Extension | File Type Description |
|---|---|
| .$$$ | Temporary file |
| .0 | Manual page (header files) |
| .1 | Manual page (general) |
| .1st | Important information/instructions |
| .2 | Manual page (system calls) |
| .3 | Manual page (library calls) |
| .3dm | Rhino 3D model (3D Image) |
| .3ds | 3D Studio scene (3D Image) |
| .3g2 | 3GPP2 multimedia (Video) |
| .3gp | 3GPP multimedia (Video) |
| .4 | Manual page (special files) |
| .5 | Manual page (file formats) |
| .6 | Manual page (games) |
| .7 | Manual page (miscellaneous) |
| .7z | 7-Zip compressed file |
| .8 | Manual page (system administration) |
| .9 | Manual page (kernel routines) |
| .906 | Calcomp plotter |
| .C | C++ (C) source code |
| .DES | Description Text or ... |
| .H | C++ (C) header |
| .PRJ | Project file |
| .TFM | Tagged Font Metric |
| .W32 | Partly native Windows makefile |
| .a | Linux/Unix static library |
| .aac | Advanced Audio Coding (Mac) |
| .abc | A Program's Master Index |
| .abk | CorelDRAW auto backup |
| .ac | Automake (autoconf macro/template) |
| .accdb | Access 2007 Database File |
| .acl | Access Control List or AutoCorrect List or CorelDRAW keyboard accelerator |
| .ad | After Dark image |
| .ada | Ada source code |
| .adb | Ada implementation file |
| .adc | Ada specification file |
| .adm | After Dark MultiModule |
| .adoc | AsciiDoc plain text (formatting) |
| .adr | After Dark Randomizer |
| .aff | Affix rules (hunspell) or Advanced Forensics Format disk image |
| .afm | Adobe font metrics (Type 1) |
| .ag4 | Access G4 document imaging |
| .ai | Adobe Illustrator graphics or Encapsulated PostScript header |
| .aif | Audio Interchange File Format |
| .aifc | Digital audio (Mac) |
| .aix | IBM AIX operating system related |
| .ajax | Asynchronous JavaScript And XML |
| .alb | JASC Image Commander |
| .am | Automake file (or Sybase Advantage Database Server) |
| .ani | Animated cursor |
| .ann | Windows help annotations |
| .ans | ANSI text |
| .apk | Android Package (executable) |
| .app | Mac OS X application (executable) |
| .arb | A translation format (Google) |
| .arc | ARC, ARC+ compressed archive |
| .arj | Compressed archive (Jung) |
| .art | Xara Studio drawing |
| .asa | ASP info |
| .asax | ASP.NET |
| .asc | ASCII file (or AsciiDoc) |
| .ascx | ASP.NET |
| .asciidoc | AsciiDoc plain text (formatting) |
| .asd | Word temporary document |
| .asf | Advanced Systems Format (Video) |
| .asm | Assembly source code |
| .asmx | ASP.NET |
| .asn1 | Abstract Syntax Notation One |
| .asp | Active Server Page (Web) |
| .aspx | Active Server Page Extended File (Web) |
| .asx | Microsoft ASF Redirector File (Video) |
| .att | AT&T Group IV fax |
| .attr | Attributes file |
| .au | Digital audio (Sun) |
| .aux | Auxiliary File (LaTeX?) |
| .avi | Audio Video Interleave File (Microsoft?) |
| .awk | Awk script |
| .axd | Actrix drawing |
| .bak | Backup File |
| .bas | BASIC source code |
| .base | Template (configuration, language, Apple?) |
| .bash | Bash shell script |
| .bat | MS-DOS, OS/2 Batch File |
| .bfc | Windows briefcase document |
| .bib | Bibliography document (BibTeX?) |
| .bin | Binary Disc Image (or Driver) |
| .bm1 | Apogee BioMenace |
| .bmk | Windows help bookmarks |
| .bml | Bookmark library (SyncURL) |
| .bmp | Bitmap Image |
| .bms | BlackMagic script |
| .bor | Borland C++ related ? |
| .brk | Brooktrout fax |
| .bs1 | Apogee Blake Stone |
| .btm | 4NT batch file |
| .bup | DVD Info File Backup |
| .bz | Bzip2 compressed |
| .bz2 | Bzip2 compressed |
| .c | C (C++) source code |
| .cab | MS Windows Cabinet (compressed?) |
| .cabal | Haskell Cabal definitions |
| .cal | MS Windows calendar or CALS raster and vector formats or SuperCalc spreadsheet |
| .cap | Ventura Pub. captions |
| .cbr | Comic Book RAR Archive |
| .cc | C++ source code |
| .ccb | Visual Basic animated button |
| .cch | Corel Chart |
| .cda | CD audio track |
| .cdr | CorelDRAW vector graphics |
| .cdt | CorelDRAW template |
| .cdx | CorelDRAW compressed drawing or FoxPro and Clipper index |
| .cer | Internet Security Certificate (Web) |
| .cfg | Configuration File |
| .cfm | ColdFusion Markup File (Web) |
| .cgi | Common Gateway Interface Script |
| .cgm | CGM vector graphics |
| .ch3 | Harvard Graphics chart |
| .chk | DOS/Windows corrupted file (Chkdsk) |
| .chm | MS Windows HTML Help data (LZX compressed?) |
| .chp | Ventura Pub. chapter |
| .cif | Ventura Pub. chapter info |
| .cit | Intergraph scanned image |
| .class | Java Class File |
| .cli | Command Line Interface or Command Language Interpreter |
| .clj | Clojure source code |
| .clp | Windows clipboard |
| .cls | Visual Basic class module |
| .cma | OCaml library file |
| .cmake | CMake Language input file |
| .cmd | Compiler command file |
| .cmf | Corel metafile |
| .cmo | OCaml object file |
| .cmp | JPEG bitmap, LEAD bitmap or RichLink composed format |
| .cmv | Corel Presentation Exchange |
| .cmx | Corel clip art |
| .cnf | Configuration (Network, OpenSSL, MySQL, ...) |
| .cnt | Windows help contents |
| .cob | COBOL source code or Truespace 3-D file |
| .com | DOS command file (executable) |
| .conf | Configuration file |
| .cpd | Fax cover document |
| .cpe | Fax cover document |
| .cpi | DOS code page |
| .cpio | CPIO archive |
| .cpl | Windows Control Panel Item or Corel color palette |
| .cpp | C++ Source Code |
| .cpr | Knowledge Access bitmap or Corel Presents presentation |
| .cpt | Corel Photopaint image |
| .cpx | Corel Presentation Exchange |
| .crd | Cardfile file |
| .crdownload | Chrome Partially Downloaded File |
| .crl | Certificate Revocation List |
| .crp | Corel Presents runtime presentation |
| .crt | Certificate file |
| .crx | Chrome Extension |
| .cs | Visual C# Source Code |
| .csc | Corel script |
| .csh | C shell script (or Photoshop Custom Shape) |
| .csr | Certificate Signing Request |
| .css | Cascading Style Sheet (Web) |
| .csv | Comma Separated Values File (Data) |
| .ct | Scitex CT bitmap |
| .cu | CUDA (NVIDIA) sourec code |
| .cue | Cue Sheet File (Disk Image) |
| .cur | Windows CursorImage |
| .cut | Dr. Halo bitmap |
| .cv5 | Canvas 5 vector/bitmap |
| .cxx | C++ language file |
| .d | D source code or DTrace or data or ... |
| .dart | Dart source code |
| .dat | General data file |
| .data | General data file |
| .db | Database file |
| .dbf | dBASE database |
| .dbt | dBASE text |
| .dbx | DATABEAM bitmap |
| .dca | IBM text |
| .dcm | DICOM medical image |
| .dcs | Color separated EPS format |
| .dct | Dictionary |
| .dcx | Intel fax image |
| .ddl | Data Definition Language (database, SQL) |
| .dds | DirectDraw Surface (Raster Image) |
| .deb | Debian Software Package (compressed) |
| .def | Definition file (Win32 library?) |
| .defs | Definition file |
| .dem | Video Game Demo |
| .dep | Dependency file (or deployment) |
| .deps | Dependency file |
| .der | Digital certificate (Distinguished Encoding Rules format) |
| .deskthemepack | Windows 8 Desktop Theme Pack |
| .dg | Autotrol vector graphics |
| .dgn | Intergraph vector graphics |
| .dia | DIA UML diagram or Diagraph graphics |
| .dib | Windows DIB bitmap |
| .dic | Dictionary |
| .dict | Dictionary |
| .dif | Spreadsheet |
| .diff | Difference file (GNU diff?) |
| .dirs | Directories list (Debian?) |
| .disco | Publishing and Discovering Web Services |
| .dist | Configuration file template (?) |
| .divx | DivX encoded video |
| .dj2 | DJGPP v2 related |
| .dlg | Win32 dialog resource |
| .dll | Windows Dynamic Link Library |
| .dmg | Mac OS X Disk Image |
| .dmp | Windows Memory Dump |
| .dnsbl | DNS Blacklist |
| .doap | Description Of A Project (XML/RDF format) |
| .doc | Microsoft Word Document |
| .docm | Microsoft Word Open XML Macro-Enabled Document |
| .docs | Documentation files list (Debian?) |
| .docx | Microsoft Word Open XML Document |
| .don | Contains successful message following the execution of bmp |
| .dot | Word template or Graphviz language |
| .dotx | Microsoft Word Open XML Document Template |
| .dox | MultiMate V4.0 document |
| .doxy | Doxygen configuration file |
| .dpc | Source dependency file containing list of dependencies |
| .dpi | Pointline bitmap |
| .dpj | Java source dependency file |
| .drv | Device Driver |
| .drw | Designer vector graphics (Version 2.x, 3.x) |
| .ds4 | Designer vector graphics (Version 4.x) |
| .dsf | Designer vector graphics (Version 6.x) |
| .dsp | Microsoft Developer Studio Project (Visual C++) |
| .dsw | Microsoft Developer Studio Workspace (Visual C++) |
| .dtd | Document Type Definition |
| .dump | Library symbols |
| .dvi | DeVice Independent document (TeX) |
| .dwg | AutoCAD Drawing Database |
| .dx | Autotrol document imaging |
| .dxf | Drawing Exchange Format File (CAD) |
| .dxp | Exports definition file |
| .ecl | Emacs Compiled Lisp code |
| .ed5 | EDMICS bitmap (DOD) |
| .el | Emacs Lisp code |
| .elc | Emacs Compiled Lisp |
| .elf | Executable and Linkable Format |
| .elf4 | Executable and Linkable Format (libc4?) |
| .emf | Enhanced Windows metafile |
| .eml | Outlook Express Electronic Mail (Microsoft) |
| .emx | MS DOS extender or eMusic file? |
| .enc | Encrypted or character set encoding file |
| .eng | English language file or dictionary |
| .ent | SGML entities (character mapping) |
| .eot | WEFT Embedded OpenType File (Microsoft ?) |
| .eps | Encapsulated PostScript |
| .epub | E-book standard file format |
| .erb | Embedded Ruby code |
| .err | Error messages |
| .erl | Erlang source code |
| .esi | Esri plot file (vector) |
| .evy | Envoy document |
| .exe | Windows executable |
| .exp | Export file (?) |
| .expect | Expected test output (PHP?) |
| .expectf | Expected test output with substitution strings (PHP?) |
| .exsd | Extension Point Schema (Eclipse) |
| .f | Fortran source code |
| .f03 | Fortran 2003 source code |
| .f08 | Fortran 2008 source code |
| .f90 | Fortran 90 source code |
| .f95 | Fortran 95 source code |
| .fax | Various fax formats |
| .fcgi | FastCGI |
| .fdx | Force index |
| .fh3 | Freehand 3 |
| .fig | Xfig image format or ... |
| .fish | Fish Shell or 3D Fish Tank |
| .fla | Adobe Flash Animation |
| .flac | Free Lossless Audio Codec |
| .flc | Autodesk animation |
| .fld | Hijaak thumbnail folder |
| .flex | FLEX (Fast LEXical analyzer generator) specification |
| .fli | Autodesk animation |
| .flt | Filter (graphics conversion?) |
| .flv | Flash Video |
| .fm3 | Format info for 1-2-3 Version 3 |
| .fmt | Format file (dBASE screen?) |
| .fmv | FrameMaker raster & vector graphics |
| .fnt | Windows font |
| .fodg | OpenDocument Graphics |
| .fodp | OpenDocument Presentation |
| .fods | OpenDocument Spreadsheet |
| .fodt | OpenDocument Text |
| .fog | Fontographer font |
| .fon | Generic Font File (or Telephone file) |
| .font | Font file |
| .for | FORTRAN source code |
| .form | HTML form file |
| .fot | Windows TrueType font info |
| .fox | FoxBase compiled program |
| .fp | CDE Front Panel file |
| .fp1 | Flying Pigs for Windows data |
| .fpx | FlashPix bitmap |
| .frag | Microsoft XPS document fragment or fragment shader file |
| .frm | dBASE report layout |
| .ftg | Windows help file links |
| .fts | Windows help text search index |
| .g4 | GTX RasterCAD (raster into vector) |
| .g95 | G95 fortran compiler related |
| .gadget | Windows Gadget (executable) |
| .gal | Corel Multimedia Manager album |
| .gam | Saved Game File |
| .gbr | Gerber File (DATA) |
| .gca | IBM MO:DCA - GOCA vector graphics |
| .gcc | GNU gcc compiler related |
| .gdb | Database format (Borland?) |
| .gdf | GDDM format |
| .ged | GEDCOM Genealogy Data or Arts & Letters graphics |
| .gem | GEM vector graphics |
| .gfi | Genigraphics presentation link |
| .gfx | Genigraphics presentation link |
| .gid | Windows help global index |
| .gif | Graphical Interchange Format |
| .gim | Genigraphics presentation link |
| .gix | Genigraphics presentation link |
| .glsl | OpenGL Shader Language (?) |
| .gmo | Machine Object (GNU gettext) |
| .gna | Genigraphics presentation link |
| .gnx | Genigraphics presentation link |
| .go | Go programming language |
| .gp4 | CALS Group IV - ITU Group IV |
| .gpg | GNU Privacy Guard |
| .gpl | General Public Licence (GNU) or GIMP palette |
| .gpx | GPS Exchange File |
| .gra | Microsoft graph |
| .grf | Micrografx Charisma vector graphics |
| .grp | Windows ProgMan Group |
| .guess | GNU script (guess type of build system) or ... |
| .gwx | Genigraphics presentation link |
| .gwz | Genigraphics presentation link |
| .gx1 | Show Partner bitmap |
| .gx2 | Show Partner bitmap |
| .gyp | Chromium (Generate Your Projects) configuration data |
| .gypi | Chromium (Generate Your Projects) include file |
| .gz | GNU Zipped file |
| .h | C/C++/Objective-C Header (Java Header) |
| .h5 | Hierarchical Data Format 5 |
| .hdl | Generated C header or header declaration |
| .he5 | Hierarchical Data Format 5 |
| .hed | HighEdit document |
| .hex | Hexadecimal Source or BinHex encoded |
| .hgl | HP Graphics language |
| .hh | C++ header |
| .hid | Help ID file |
| .hin | Header INclude or HyperChem file |
| .hlp | Help text (MS Help LZSS compressed?) |
| .hpj | Visual Basic help project |
| .hpl | HP Graphics language |
| .hpp | C++ program header |
| .hpux | HP-UX operating system related |
| .hqx | BinHex Encoded File |
| .hrc | An .src include header file |
| .hs | Haskell source code |
| .ht | HyperTerminal |
| .htc | HTML Component (embedding HTML- and Script-Code) |
| .htm | Hypertext Markup Language |
| .html | Hypertext Markup Language |
| .htx | HTML extension file |
| .hwdb | Hardware database |
| .hxx | C++ header |
| .hyc | WordPerfect hyphen list |
| .i | Include or intermediate file? |
| .ica | IBM MO:DCA - IOCA bitmap |
| .icb | Targa bitmap |
| .icc | Color profile (ICC) |
| .icns | Mac OS X icon resource |
| .ico | Icon File |
| .ics | iCalendar File |
| .idc | Internet Database Connector |
| .idd | MIDI instrument definition |
| .ide | Development environment configuration |
| .idl | Component interface description (Interface Definition Language) |
| .idx | FoxBase index |
| .iff | Interchange File Format (Audio) or Amiga bitmap |
| .igf | Inset Systems (Hijaak) raster & vector graphics |
| .il | Icon library |
| .ilb | Intermediate StarOffice interface definition |
| .img | ISO 9660 CD-ROM image (or Macintosh image file or EM Paint bitmap) |
| .in | Input file (Autoconf configuration template?) |
| .inc | Include file |
| .indd | Adobe InDesign Document |
| .inf | Setup information or installation file |
| .info | GNU Info |
| .ini | Initialization file |
| .init | System initialisation start/stop script |
| .inl | Inline header |
| .ins | Installation configuration |
| .inv | Inventory File (?) |
| .iso | Disc image |
| .iss | Inno Setup Script (or InstallShield file) |
| .its | Internationalization Tag Set or Image Tree Source or Impulse Tracker Sample |
| .jar | Java archive |
| .java | Java source code |
| .jff | JPEG bitmap |
| .jif | JPEG bitmap |
| .jl | Julia source code |
| .jnl | CVS journal |
| .jp2 | JPEG 2000 image |
| .jpeg | JPEG bitmap image |
| .jpg | JPEG bitmap image |
| .js | JavaScript |
| .jsb2 | JSBuilder2 script |
| .json | JavaScript Object Notation (data interchange format) |
| .jsp | Java Server Page |
| .jsx | Extended (nonstandard) JavaScript |
| .jt | JT Fax |
| .jtf | JPEG bitmap |
| .kdc | Kodak Photo bitmap |
| .kdelnk | KDE1 configuration |
| .key | Security or license key (or keyboard definitions or a Keynote Presentation) |
| .keychain | Mac OS X Keychain |
| .kfx | Kofax group IV fax |
| .kml | Keyhole Markup Language (GIS) |
| .kmz | Google Earth Placemark (GIS) |
| .ksh | Korn shell script |
| .kt | Kotlin source code |
| .kts | Kotlin shell script |
| .kye | Kye game program data |
| .l | Lex source code |
| .la | GNU libtool library file |
| .lbl | dBASE label |
| .lbm | Deluxe Paint graphics |
| .ld | Linker directives |
| .ldif | LDAP Data Interchange Format |
| .leg | Legacy text |
| .less | LESS style sheet |
| .lgpl | Lesser General Public Licence (GNU) |
| .lib | Function library |
| .lin | Incremental linking file |
| .lintian-overrides | Lintian override (Debian dpkg) |
| .list | General list (APT, glib-genmarshal, ...) |
| .lit | Microsoft EBook Reader (compressed?) |
| .ll | Lex source code |
| .lng | File containing string and message definitions for the setup program |
| .lnk | Windows File Shortcut or Linker response |
| .lnx | Linux-specific makefile |
| .lock | General lock file (or PHP composer?) |
| .log | Log File |
| .lqt | Liquid Audio |
| .lsm | Linux Software Map (software package information) |
| .lsn | Topic list (CDE) |
| .lst | List |
| .lua | Lua Source |
| .lv | LaserView Group IV |
| .lyx | LyX document |
| .lzh | LHARC compressed |
| .lzs | Skyroads program data |
| .m | Objective-C Implementation |
| .m1v | MPEG |
| .m3d | Corel Motion 3-D |
| .m3u | Media playlist (MPEG?) audio |
| .m4 | M4 macro |
| .m4a | MPEG-4 audio |
| .m4v | iTunes video |
| .mac | MacPaint bitmap |
| .mak | Visual Basic/MS C++ project |
| .make | Makefile (generated?) |
| .mako | Mako template (Python) |
| .man | Manual page |
| .map | Link editor map |
| .max | 3ds Max Scene |
| .mb1 | Apogee Moster Bash file |
| .mbx | Mailbox (e-mail) |
| .mcs | MathCAD format |
| .mc | M4 macro or Modula-3 or Midnight Commander or ... |
| .mcw | Word for Macintosh document |
| .md | Markdown plain text (formatting) |
| .md5 | MD5 checksum |
| .mdb | Microsoft Access Database |
| .mdf | Media disc image |
| .mdx | dBASE IV multi-index (or Markdown with JSX) |
| .mel | Maya script |
| .met | OS/2 Metafile |
| .meu | Menu items |
| .mf | (Java) manifest file (or Adobe FrameMaker or Metafont) |
| .mid | MIDI File (or Eudora script file) |
| .miff | Magick Image File Format |
| .mil | CALS Group IV - ITU Group IV? |
| .mim | Multi-Purpose Internet Mail Message |
| .mingw | MinGW (Minimalist GNU for Windows) build file |
| .mix | PhotoDraw |
| .mk | A dmake makefile |
| .ml | OCaml source code |
| .mli | OCaml header file |
| .mm | Objective-C++ source, GROFF source, mindmap? |
| .mmdb | MaxMind DB (GeoIP) |
| .mme | MIME-encoded |
| .mmf | Microsoft mail |
| .mmm | Macromind animation format |
| .mms | Module Management System (VMS) or sound or JPEG? |
| .mng | Multiple-image Network Graphics |
| .mo | Machine Object (GNU gettext) |
| .mod | BASIC module file (or Eudora script or GNU MathProg model) |
| .mov | Apple QuickTime Movie |
| .mp2 | MPEG |
| .mp2v | MPEG |
| .mp3 | MPEG-1 layer 3 audio |
| .mp4 | MPEG-4 video |
| .mpa | MPEG-2 audio |
| .mpe | MPEG |
| .mpeg | MPEG |
| .mpg | MPEG video |
| .mpp | Microsoft Project |
| .mrk | Informative graphics markup |
| .msc | C Makefile (or Microsoft Management Console) |
| .msg | Outlook mail message |
| .msi | Windows installer package |
| .msp | Microsoft Paint bitmap |
| .msvc | Microsoft Visual C++ compiler makefile |
| .mus | Music |
| .mvb | Microsoft multimedia viewer |
| .n | Linux/Unix manual page (Tcl/Tk keywords) |
| .nap | NAPLPS format |
| .nav | Eudora script |
| .ndx | dBASE index (or CDE index?) |
| .nes | Nintendo (NES) ROM |
| .new | New information file |
| .ng | Norton Guides text |
| .nib | Apple InterfaceBuilder |
| .nlm | NetWare NLM program |
| .nsh | NSIS (Nullsoft Scriptable Install System) installation header/include file |
| .nsi | NSIS (Nullsoft Scriptable Install System) installation script |
| .ntz | InVircible antivirus blueprint |
| .o | Linux/Unix machine language (object file) |
| .oaz | OAZ Fax |
| .obd | Microsoft Office binder |
| .obj | Machine language or Wavefront 3D object or Win32 object |
| .obz | Microsoft Office wizard |
| .odg | OpenDocument Graphics |
| .odp | OpenDocument Presentation |
| .ods | OpenDocument Spreadsheet |
| .odt | OpenDocument Text |
| .oeb | Open eBook publication |
| .ogg | Ogg Vorbis audio |
| .olb | OLE object library |
| .old | Old version (backup copy) |
| .ole | OLE object |
| .opf | Open package |
| .opt | Options file |
| .org | Organizer file |
| .orig | Original file (backup?) |
| .os2 | OS/2 operating system related |
| .otf | OpenType Font |
| .out | Outlines or (compiler) output file |
| .ova | OVF (Open Virtualization Format) distribution file (TAR format) |
| .ovl | Overlay module |
| .ovr | Overlay module |
| .ozm | Sharp Organizer memo bank |
| .ozp | Sharp Organizer telephone bank |
| .p7b | PKCS #7 certificate |
| .p10 | Tektronix Plot10 plotter (vector graphics) |
| .p12 | PFX certificate (PKCS12) |
| .pages | Pages Document |
| .pal | Windows palette |
| .par | Script particles file |
| .part | Partially Downloaded File |
| .pas | Pascal source code |
| .pat | CorelDRAW pattern |
| .pbd | PowerBuilder dynamic library |
| .pbk | Microsoft Phonebook |
| .pbm | Portable bitmap |
| .pbxproj | Apple Project Builder Xcode Project File Format |
| .pc | Pkg-config metadata (?) |
| .pcd | Photo CD bitmap |
| .pch | Prefix or precompild header |
| .pcl | HP LaserJet series |
| .pcm | LaserJet cartridge info |
| .pcs | PICS animation |
| .pct | Picture File (PC Paint or Macintosh PICT) |
| .pcw | PC Write document |
| .pcx | PC Paintbrush bitmap |
| .pdb | Program Database |
| Portable Document Format (or MS Package Definition File or a Printer Driver) | |
| .pdv | PC Paintbrush printer driver |
| .pdw | HiJaak vector graphics |
| .pem | PEM-formatted file (concatenated certificate container) |
| .perl | Perl Script |
| .pfa | Type 1 or 3 font file (ASCII) |
| .pfb | Type 1 font (encrypted) |
| .pfm | Windows Type 1 font metrics |
| .pfx | PKCS#12 certificates (Microsoft) |
| .pgl | HPGL 7475A plotter (vector graphics) |
| .pgp | Pretty Good Privacy |
| .phar | PHP Archive |
| .php | PHP source code |
| .php3 | PHP 3 source code |
| .php4 | PHP 4 source code |
| .php5 | PHP 5 source code |
| .phpt | PHP test suite |
| .pic | Lotus 1-2-3 or Mac PICT format or IBM Storyboard bitmap or various vector formats |
| .pif | MS Program Information File or IBM Picture Interchange |
| .pin | Epic Pinball data |
| .pix | Inset Systems raster & vector graphics |
| .pkg | Mac OS X installer package |
| .pl | Perl Script |
| .plf | InterVideo WinDVD playlist |
| .plt | HPGL or AutoCAD plotter |
| .plugin | Mac OS X Plug-in |
| .pm | Perl module file (or PageMaker graphics/text) |
| .pmk | Project makefiles |
| .pml | PageMaker library |
| .pmx | PageMaker document (x=ver.) |
| .png | Portable Network Graphic |
| .po | Portable Object (GNU gettext) |
| .pod | Perldoc file or ... |
| .pot | Portable Object Template (GNU gettext) or MS Powerpoint |
| .pov | POV-Ray ray tracing |
| .pp4 | Picture Publisher 4 |
| .ppd | PostScript printer description |
| .ppm | Portable Pixelmap |
| .pps | PowerPoint Slide Show |
| .ppt | PowerPoint Presentation |
| .pptx | PowerPoint Open XML presentation |
| .prc | Resource (text or program) file (3com PalmPilot) |
| .prd | Microsoft Word printer driver |
| .pre | Lotus Freelance |
| .prf | Outlook Profile |
| .prg | dBASE source code |
| .prn | Temporary print file (or XyWrite printer driver) |
| .pro | Profile or project or prolog file or ... |
| .proto | Google Protocol Buffer (Protobuf) definition file |
| .prs | Harvard Graphics (or WordPerfect printer driver) |
| .prt | Formatted text |
| .ps | PostScript |
| .ps1 | Windows PowerShell (or PostScript) |
| .psd | Adobe Photoshop Document |
| .pspimage | PaintShop Pro Image |
| .psr | Powersoft report |
| .ptr | Mouse pointer |
| .ptx | PageMaker template (x=ver.) |
| .pub | Microsoft or Ventura Publisher publication |
| .pup | PowerUP (Amiga) or PlayStation Update |
| .puz | Across puzzle |
| .pvk | Private Key |
| .pwl | Windows password list |
| .py | Python Script |
| .pyc | Python Script (compiled bytecode) |
| .pyo | Python Script (compiled bytecode with optimizations) |
| .qbw | QuickBooks |
| .qlb | Quick programming library |
| .qlc | ATM font info |
| .qml | QT Meta Language |
| .qpg | QNX Package Generation (XML-style) |
| .qrc | Qt resource file |
| .qt | QuickTime movie |
| .qtm | QuickTime movie |
| .r | Resource file for Macintosh |
| .r8l | LaserJet landscape font |
| .r8p | LaserJet portrait font |
| .ra | Real Audio |
| .rake | Ruby make |
| .ram | Real Audio |
| .rar | WinRAR Compressed Archive |
| .ras | Sun bitmap |
| .raw | 3-D file (open standard) |
| .rb | Ruby script |
| .rc | Dmake recursive makefile or a Win32 resource script file |
| .Rd | R documentation |
| .rdb | Interface and type description database (type library) |
| .rdf | RDF/XML (Resource Description Framework) |
| .rec | Recorder file |
| .reg | Registration file |
| .res | Programming resource |
| .resx | Microsoft .NET resource file (XML) |
| .rex | REXX (interpreter) script |
| .rft | DCA/RFT document |
| .rgb | SGI bitmap |
| .ria | Alpharel Group IV bitmap |
| .rib | Renderman graphics |
| .ric | Roch FaxNet |
| .rix | RIX virtual screen |
| .rlc | CAD Overlay ESP (Image Systems) |
| .rle | Compressed (run length encoded) |
| .rlf | RichLink compiled format |
| .rm | Real Media |
| .rmi | MIDI music |
| .rmm | Real Media |
| .rnd | AutoShade rendering format |
| .rng | RELAX NG schema (XML) |
| .rnl | GTX Runlength bitmap |
| .rom | N64 Game ROM File |
| .rpm | Red Hat Package Manager archive |
| .rs | Rust source code |
| .rss | Rich Site Summary (Web) |
| .rst | reStructuredText (Python) or R(eadme fir)ST or ... |
| .rtf | Rich Text Format (or Microsoft text/graphics) |
| .rtl | HP Raster Transfer Language |
| .ru | Russian language or Ruby rack or Java Runtime file |
| .rv | Real Video |
| .s | Assembler source |
| .s7i | Seed7 include/library file |
| .sam | Ami Pro document |
| .sas | SAS/C or SAS Institute file |
| .sat | ACIS 3-D model |
| .sav | Saved file |
| .sbl | BASIC file |
| .sbp | IBM Storyboard graphics/Superbase text |
| .sc | Paradox source code |
| .sc2 | Microsoft Schedule+ 7 |
| .scala | Scala language |
| .scd | Microsoft Schedule+ 7 |
| .sch | Microsoft Schedule+ 1 |
| .scm | Scheme source code or ScreenCam movie |
| .scp | Script source (Dial-up Networking?) |
| .scpt | AppleScript script |
| .scr | Generic script or Fax image or Windows screen saver or dBASE screen layout |
| .scss | Sass Cascading Style Sheet |
| .sct | Lotus Manuscript screen capture text or Scitex bitmap |
| .sd7 | Seed7 program |
| .sda | Draw application document |
| .sdb | Base application document |
| .sdc | Calc application document |
| .sdd | Impress application document |
| .sdf | Standard Data File |
| .sdg | Storage file for Gallery |
| .sdi | Interface definition file |
| .sdl | SmartDraw library |
| .sdm | Mail message |
| .sdr | SmartDraw vector graphics |
| .sds | Chart application document |
| .sdt | SmartDraw template |
| .sdv | Gallery storage file |
| .sdw | Writer application document |
| .sed | SED (stream editor) pattern (or Self Extraction Directive file) |
| .seg | Function ordering instructions for Microsoft linker |
| .ser | Java serialized object |
| .set | Setup parameters |
| .sfl | LaserJet landscape font |
| .sfp | LaserJet portrait font |
| .sfs | PCL 5 scalable font |
| .sgi | SGI bitmap |
| .sgl | Writer master document file |
| .sgml | Standard Generalized Markup Language |
| .sh | Shell Script |
| .sha1 | SHA-1 checksum |
| .shb | Corel Show |
| .shg | Segmented HyperGraphic (imagemap Windows help) |
| .shs | OLE2 package |
| .shtml | SSI-enabled HTML file |
| .shw | Corel Show |
| .sid | Slot id file |
| .sin | Sed insertion script? |
| .sitx | StuffIt X Archive |
| .skip | Files to be skipped (GNU gettext?) |
| .sld | AutoCAD slide |
| .slk | SYLK format (spreadsheets) |
| .sln | Visual Studio Solution |
| .smap | Java Servlet (JSP) source map |
| .smf | Math application formula document |
| .smi | SMIL multimedia |
| .sms | Math application formula document template |
| .snd | Digital audio |
| .so | Linux/Unix dynamic shared library |
| .spd | Speedo scalable font |
| .spec | Specification file (build "recipes" for rpm or pkgbuild) |
| .sql | Structured Query Language Data |
| .src | Source resource string file |
| .srs | Screen resource string file |
| .srt | SubRip Subtitle File (Video) |
| .sty | Ventura Pub. style sheet |
| .sub | Subtitles, subchannel data or subset? |
| .sun | Sun bitmap |
| .supp | Valgrind suppression or Apple iOS |
| .suse | openSUSE (SLES) specific file |
| .svg | Scalable Vector Graphics |
| .svgz | Scalable Vector Graphics (gzip-compressed) |
| .svn-base | Subversion base file |
| .svx | Amiga sound file |
| .swf | Shockwave Flash Movie |
| .swift | Swift Source Code |
| .sy3 | Harvard Graphics symbol |
| .syl | SYLK format (spreadsheets) |
| .sym | Symbol file/table? |
| .sys | DOS, Windows or OS/2 System File |
| .sxc | StarOffice (OpenOffice) Calc Spreadsheet |
| .sxw | StarOffice (OpenOffice) Writer Document |
| .t | Test file (Perl?) |
| .tab | Table file or tab separated file ot guitar tablature |
| .tal | Adobe Type Align shaped text |
| .tar | Tape archive file (Linux/Unix) |
| .taz | Gzip compressed tar archive |
| .tbl | Generic Table (Typo3 character conversion?) |
| .tc | Turbo C configuration (Borland) or ... |
| .tcl | Tcl script |
| .tdf | Speedo typeface definition |
| .test | Testing file |
| .tex | LaTeX Source Document |
| .texi | GNU Texinfo source (or TeX file) |
| .text | Plain ASCII Text |
| .tga | Targa Graphic |
| .tgz | Gzip compressed tar archive |
| .thm | Thumbnail Image or Storage file for Gallery or OpenOffice Configuration |
| .tif | Tagged Image File |
| .tiff | Tagged Image File Format |
| .tk | (Tcl/)Tk script |
| .tlb | OLE type library |
| .tmp | Temporary File |
| .tmpl | Template |
| .toast | Toast Disc Image |
| .toc | Table of contents |
| .toml | Configuration file format |
| .torrent | BitTorrent File (P2P) |
| .tpl | Template |
| .trm | Terminal file |
| .ts | Translation file, Video Transport Stream or MS TypeScript |
| .tst | Test file? |
| .tsv | Tab Separated Values |
| .tsx | Embedded JSX TypeScript elements (React) |
| .ttc | TrueType font compressed |
| .ttf | TrueType Font |
| .twig | Twig template (PHP) |
| .txt | Plain ASCII Text |
| .ucm | Unicode Character Mapping |
| .ui | User Interface (XML, Qt?) |
| .unix | Unix operating system related |
| .urd | From an IDL-generated relational database (Uno Reflection Data) |
| .url | Uniform Resource Locator |
| .user | MS Visual Studio? |
| .usl | LaserJet landscape font |
| .usp | LaserJet portrait font |
| .utf8 | Unicode UTF-8 encoded |
| .uue | Uuencoded File |
| .uyvy | 16-bit image YUV format (4:2:2) |
| .vala | Vala programming language source code |
| .vb | VBScript |
| .vbp | Visual Basic project |
| .vbs | Visual Basic script |
| .vbx | Visual Basic custom control |
| .vc | MS Visual C++ related or VisiCalc spreadsheet or ... |
| .vcd | Virtual CD disk image |
| .vcf | vCard File |
| .vcproj | Visual C++ Project |
| .vcxproj | Visual C++ Project |
| .vdproj | Visual Studio Deployment Project |
| .vda | Targa bitmap |
| .ver | Version record (GNU linker script?) |
| .vgr | Ventura Pub. chapter info |
| .vim | Vim syntax file |
| .vmdk | Virtual Machine Disk file (VMware) |
| .vms | (Open)VMS specific text file |
| .vob | DVD Video Object |
| .voc | Sound Blaster sound |
| .vor | Writer document template |
| .vox | Voxware compressed audio |
| .vp | Ventural Publisher publication |
| .vsd | Visio drawing |
| .vst | Targa bitmap |
| .vue | dBASE relational view |
| .war | Web application ARchive |
| .wav | Digital Waveform Audio (Windows) |
| .wax | WMA metafile (location of WMA file) |
| .wbk | Microsoft Word backup |
| .wbt | WinBatch file |
| .wcm | WordPerfect macro |
| .wdb | Microsoft works data |
| .webm | WebM Video (Google) |
| .webp | WebP Image (Google) |
| .wgp | Wild Board games data |
| .wid | Font width table |
| .wif | Wavelet image |
| .win | Window(s) specific file (configuration, backup) |
| .wiz | Microsoft Word wizard |
| .wk1 | Lotus ver. 2.x |
| .wk3 | Lotus ver. 3.x & Windows |
| .wk4 | Lotus ver. 4.x |
| .wkq | Quattro spreadsheet |
| .wks | Lotus 1-2-3 ver. 1a spreadsheet |
| .wma | Windows Media Audio (ASF) |
| .wmf | Windows metafile (vector graphics file?) |
| .wmv | Windows Media Video (ASF file) |
| .woff | Web Open Font Format |
| .wpd | WordPerfect Document or Windows printer description |
| .wpg | WordPerfect raster & vector graphics |
| .wpm | WordPerfect macro |
| .wps | Microsoft Works document |
| .wpt | WordPerfect template |
| .wri | Windows Write document |
| .wrk | Sympohony spreadsheet |
| .wrl | VRML page |
| .wsd | WordStar 2000 document |
| .wsdl | Web Services Description Language (XML) |
| .wsf | Windows Script |
| .wsgi | Web Server Gateway Interface (Python) |
| .wsh | Windows Scrip Host properties |
| .wvl | Wavelet compressed file |
| .wvx | WMV metafile (location of WMV file) |
| .wxs | Microsoft WiX Installer Source |
| .x | Linux/Unix manual page (X Windows system) or ... |
| .xar | Corel Xara drawing |
| .xbm | X Window bitmap |
| .xcf | GIMP image format |
| .xcodeproj | Xcode Project |
| .xfx | JetFax |
| .xhtml | Extensible Hypertext Markup Language |
| .xib | Interface Builder (Mac OS X) |
| .xla | Excel add-in |
| .xlb | Excel toolbar |
| .xlc | Excel chart |
| .xld | Excel dialogue |
| .xlf | XLIFF (XML Localisation Interchange File Format) |
| .xlk | Excel backup |
| .xlm | Excel macro |
| .xlr | Works Spreadsheet |
| .xls | Microsoft Excel Spreadsheet |
| .xlsm | Microsoft Excel Open XML Macro-Enabled Spreadsheet |
| .xlsx | Microsoft Excel Open XML Spreadsheet |
| .xlt | Excel template |
| .xlw | Excel project |
| .xml | Extensible Markup Language (XML) |
| .xpi | Firefox extension (ZIP file) |
| .xpm | X Window pixel map graphics |
| .xs | XS interface description Perl/C (or Hummingbird Exceed) |
| .xsb | XML Schema Binary (or MS XACT Sound Bank) |
| .xsd | XML Schema Definition |
| .xsl | XML Stylesheet Language |
| .xslt | Extensible Stylesheet Language Transformation (XML) |
| .xul | XML User Interface Language |
| .xwd | X Window dump |
| .xyw | XyWrite for Windows document |
| .xz | XZ Utils compressed file (LZMA/LZMA2) |
| .y | Yacc source code |
| .yy | Yacc or Bison |
| .yaml | YAML Ain't Markup Language |
| .yml | YAML Ain't Markup Language |
| .yuv | YUV (color space picel format) encoded image |
| .yxx | Bison source code |
| .z | Linux/Unix Gzip archive |
| .zig | Zig programming language source code |
| .zip | Zip-compressed File |
| .zipx | Extended Zip-compressed File |
| .zone | DNS zone description |
| .zoo | Zoo compressed file |
| .zsh | ZSH shell script |