We use computer and sometimes we receive a file from our friends or download from the internet but we are not sure about the file extension. We rush to others to find the meaning of this file extension . So here I tried out to find a huge list of file extension used by computer programs or computer hardware. If I forget to list any other file extension then let me know I will update my list.
A
- a - library (unix)
- .ad - screen saver data (AfterDark)
- .adi - graphics (AutoCAD)
- .adl - MCA adapter description library (QEMM)
- .afi - Truevision bitmap graphics
- .afm - Type 1 font metric ASCII data for font installer (ATM - many)
- .all - format file for working pages (Always)
- .all - general printer information (WordPerfect for Win)
- .ani - animation (Presidio - many)
- .anm - animation (Deluxe Paint Animator)
- .ans - ANSI graphics (character animation)
- .ans - ASCII text ANSI character set (NewWave Write)
- .asc - ASCII text file
- .avi - Audio Video Interleaved animation file (Video for Windows)
B
- .bak - backup file
- .bas - BASIC source code file
- .bat - batch file (DOS)
- .bbm - brush (Deluxe Paint)
- .bbs - Bulletin Board System announce or text info file
- .bch - batch process object file (dBASE Application Generator)
- .bcp - Borland C++ makefile
- .bdf - Bitmap Distribution Format font file (X11)
- .bga - bitmap graphics
- .bib - bibliography (ASCII)
- .bib - database - not compatible with TeX format (Papyrus)
- .bib - literature database (TeX/BibTeX)
- .bif - Binary Image Format b&w graphics (Image Capture board)
- .bin - binary file
- .bio - OS2 BIOS
- .bit - bitmap X11
- .bm - BitMap graphics
- .bmk - Help Bookmarks (Windows 3.x)
- .bmp - BitMaP graphics (PC Paintbrush - many)
- .bpt - bitmap fills file (CorelDRAW)
- .btm - Batch To Memory batch file (4DOS)
- .bup - backup file
C
- .c - C source code file
- .c - compressed unix file archive created by COMPACT
- .c++ - C++ source code file
- .cal - calendar file (Windows 3.x)
- .cal - spreatsheet (SuperCalc)
- .cbl - COBOL source code file
- .cbm - compiled bitmap graphics (XLib)
- .cbt - Computer Based Training (many)
- .cc - C++ source code file
- .ceg - bitmap graphics (Tempra Show - Edsun Continuous Edge Graphics)
- .cga - CGA display font (Ventura Publisher)
- .chk - recovered data (DOS CHKDSK)
- .chk - temporary file (WordPerfect for Win)
- .clp - clip art graphics (Quattro Pro)
- .clp - clipboard file (Windows 3.x)
- .cls - C++ class definition file
- .cmd - batch file (OS/2)
- .cmd - command (dBASE - Waffle)
- .cmd - external command menu (1st Reader)
- .cpp - C++ source code file
- .cpp - presentation (CA-Cricket Presents)
- .cpt - compressed Mac file archive created by COMPACT PRO (ext-pc.zip)
- .cur - cursor image file (Windows 3.x)
D
- .dat - data file in special format or ASCII
- .dbd - debug info (Clarion Modula-2)
- .dbg - symbolic debugging information (MS C/C++)
- .dcf - disk image file
- .dd - compressed Macintosh file archive created by DISKDOUBLER
- .deb - DEBUG script (DOS Debug)
- .def - defaults - definitions
- .dem - demonstration
- .dem - graphics (VistaPro)
- .dgs - diagnostics
- .dic - dictionary
- .dir - directory file (VAX)
- .diz - description file (Description In Zip)
- .dlg - dialog resource script file (MS Windows SDK)
- .dll - Dynamic Link Library (Windows 3.x - OS/2)
- .dll - export/import filter (CorelDRAW)
- .dmp - dump file (eg. screen or memory)
- .doc - document text file
- .dos - network driver (eg. pkt_dis.dos)
- .dos - text file containing DOS specific info
- .drv - device driver eg. for printer
- .dsk - project desktop file (Borland C++ - Turbo Pascal)
- .dss - screensaver file (DCC)
E
- .ega - EGA display font (Ventura Publisher)
- .emu - terminal emulation data (BITCOM)
- .env - Enveloper macro (WOPR)
- .env - environment file (WordPerfect for Win)
- .err - error log
- .err - error messages for command line compilers
- .esh - Extended Shell batch file
- .exc - REXX source code file (VM/CMS)
- .exc - exclude file for Optimize (do not process) (QEMM)
- .exe - directly executable program (DOS)
- .exm - MSDOS executable, system-manager compliant (HP calculator)
- .ext - extension file (Norton Commander)
F
- .fac - FACE graphics
- .faq - Frequently Asked Questions text file
- .fax - fax (raster graphics) (most Fax programs)
- .fdw - form (F3 Design and Mapping)
- .fix - patch file
- .frm - form (Visual Basic)
- .ftp - configuration (FTP Software PC/TCP)
- .fx - on-line guide (FastLynx)
- .fxd - phonebook (FAXit)
G
- .gbl - global definitions (VAXTPU editor)
- .gfb - compressed GIF image created by GIFBLAST (gifblast.exe)
- .gft - font (NeoPaint)
- .gif - Graphics Interchange Format bitmap graphics (CompuShow)
- .gly - glossary (MS Word)
- .gph - graph (Lotus 1-2-3/G)
- .gr2 - screen driver (Windows 3.x)
- .grb - MS-DOS Shell Monitor file (MS-DOS 5)
- .grp - group file (Windows 3.x - Papyrus)
H
- .hlp - help information
- .hof - Hall Of Fame (game scores)
- .hp8 - ASCII text HP Roman8 character set (NewWave Write)
- .htm - HTML document (Mosaic)
- .htx - Hypertext file
I
- .iax - bitmap graphics (IBM Image Access eXecutive)
- .ibm - compressed file archive created by ARCHDOS (Internal IBM only)
- .icn - ICON source code file
- .ico - icon (Windows 3.x)
- .id - disk identification file
- .ifs - system file (OS/2) hpfs.ifs
- .img - bitmap graphics (Ventura Publisher - GEM Paint)
- .inc - include file (several programming languages)
- .inf - information text file (ASCII)
- .inf - install script
- .ini - initialization file
- .ins - (WordPerfect) wp51.ins
- .ins - installation script (1st Reader)
J
- .jas - graphics
- .jbd - datafile (SigmaScan)
- .jpc - graphics (Japan PIC)
- .jpg - JPEG Joint Photography Experts Group format bitmap graphics
- .jtf - graphics (TIFF file with JPEG compression)
K
- .key - security file eg. Shareware Registration info
- .kps - IBM KIPS bitmap graphics
- .kyb - keyboard mapping (FTP Software PC/TCP)
L
- .lbm - bitmap graphics (DeluxePaint)
- .lbm - linear bitmap graphics (XLib)
- .lcl - (FTP Software PC/TCP)
- .ldb - (MS Access)
- .lgo - startup logo code (Windows 3.x)
- .lib - library file (several programming languages)
- .lis - listing (VAX)
- .log - log file
- .lpc - printer driver (TEKO)
M
- .m3d - 3D animation macro
- .mac - bitmap graphics (Macintosh MacPaint)
- .mac - macro
- .mai - mail (VAX)
- .mak - makefile
- .mak - project file (Visual Basic)
- .man - command manual
- .map - color palette
- .map - format data (Micrografx Picture Publisher)
- .map - linker map file
- .map - map (Atlas MapMaker)
- .map - network map (AccView)
- .mbx - mailbox data (ZERBERUS)
- .mci - MCI command script (Media Control Interface)
- .mcp - printer driver (Mathcad)
- .mcw - text file (MacWrite II)
- .mdm - modem definition (TELIX)
- .meu - menu group (DOS Shell)
- .mid - standard MIDI file (music synthetizers)
- .mke - makefile (MS Windows SDK)
- .mod - MODULA-2 source code file (Clarion Modula-2)
- .mod - Windows kernel module
- .mon - monitor description (ReadMail)
- .mov - movie (AutoCAD AutoFlix)
- .mp2 - MPEG audio file (xing)
- .mpc - calender file (MS Project)
- .mpg - MPEG animation
- .msg - message
- .msp - bitmap graphics (Microsoft Paint)
- .mst - setup script (MS Windows SDK)
- .mth - math file (Derive)
- .mtm - MultiTracker Module music
- .mtw - datafile (Minitab)
- .mu - menu (Quattro Pro)
- .mus - sound file (MusicTime)
- .mvf - stop frame file (AutoCAD AutoFlix)
- .mvi - movie command file (AutoCAD AutoFlix)
- .mvw - log file (Saber LAN)
- .mxt - (MS C)
N
- .nws - info text file (latest news) (ASCII)
- .nxt - sound (NeXT format)
O
- .obj - object code (Intel Recolatable Object Module)
- .ocx - OLE custom control
- .off - Object File Format vector graphics
- .old - backup file
- .ovl - overlay file (part of program to be loaded when needed)
- .ovr - overlay file (part of program to be loaded when needed)
P
- .pac - STAD Image (graphics ?)
- .pac - package (SBStudio II)
- .pal - color palette
- .par - permanent output file (Windows 3.x)
- .pcc - cutout picture vector graphics (PC Paintbrush)
- .pch - patch file
- .pct - bitmap graphics (Macintosh b&w PICT1 - color PICT2)
- .pcw - text file (PC Write)
- .pcx - bitmap graphics (PC Paintbrush)
- .pda - bitmap graphics
- .pdv - printer driver (Paintbrush)
- .pgm - Portable Grayscale bitMap graphics
- .pgm - program (Signature)
- .pgp - support file (Pretty Good Privacy RSA System)
- .pgs - manual page (man4dos)
- .pic - PIXAR picture file (SDSC Image Tool)
- .pic - bitmap graphics (Macintosh b&w PICT1 - color PICT2)
- .pic - bitmap graphics (many eg. Lotus 1-2-3 - PC Paint)
- .pif - Program Information File (Windows 3.x)
- .pif - vector graphics GDF format (IBM mainframe computers)
- .pit - compressed Mac file archive created by PACKIT (unpackit.zoo)
- .pll - pre-linked library (Clipper 5)
- .pnt - Macintosh painting
- .pop - messages index (PopMail)
- .pop - pop-up menu object (dBASE Application Generator)
- .prd - printer driver (many)
- .pub - public key ring file (Pretty Good Privacy RSA System)
Q
- .qpr - print queue device driver (OS/2)
- .qpx - compiled query program (FoxPro)
- .qrt - QRT ray tracing graphics
- .qry - query (dBASE IV)
- .qt - QuickTime movie (animation)
- .qwk - QWK reader message file
- .qxd - document (QuarkXPress)
- .qxl - element library (QuarkXPress)
R
- .rdi - device-independent bitmap file (RIFF RDIB format)
- .rdx - datafile (Reflex)
- .rec - datafile (EpiInfo)
- .rec - record file (Sprint)
- .rec - recorded macro file (Windows 3.x)
- .red - path info (Clarion Modula-2)
- .ref - cross-reference
- .reg - OLE Registration (Windows 3.x)
- .reg - registration (Corel programs)
- .rem - remarks
- .rgb - SGI RGB image file (SDSC Image Tool)
- .rif - RIFF bitmap graphics (Fractal Design Painter)
- .rip - graphics (Remote Access)
- .rix - bitmap graphics (ColorRIX VGA Paint)
- .rmk - makefile (RMAKE)
- .rpt - report
- .rtf - Windows Help file script
- .rtl - text file
S
- .sav - backup file (saved file)
- .sav - configuration
- .sav - saved game situation (eg. NetHack)
- .sbd - storyboard (Storyboard Editor)
- .sbi - Sound Blaster Instrument file (Creative Labs)
- .sbr - support file (Source Browser)
- .scc - text file
- .scr - DEBUG source code file (DOS Debug)
- .scr - screen saver (Windows 3.x)
- .scx - bitmap graphics (ColorRIX)
- .sea - Self-Extracting compressed Macintosh file Archive
- .sec - secret key ring file (Pretty Good Privacy RSA System)
- .sec - secured animation file (Disney Animation Studio)
- .set - setup options file
- .sgi - graphics (IRIS - Silicon Graphics)
- .sig - current program settings (Signature)
- .sig - signature file (PopMail)
- .sit - compressed Macintosh archive created by STUFFIT (unsit30.zip)
- .smp - sample (sound file)
- .smt - text file (Smart Ware II)
- .snd - digitized sound file (Macintosh/ATARI/PC)
- .spl - sample
- .sum - Summary
- .swp - swap file (DOS)
- .sys - datafile (SYGRAPH - SYSTAT - SPSS/PC)
- .sys - system file - device driver or hardware configuration info (DOS)
T
- .tbl - graphics (native format) (PageMaker TableEditor)
- .tbl - table of values (OS/2)
- .tel - host file (Telnet)
- .tga - TrueVision Targa bitmap graphics
- .tmp - temporary file
- .toc - Table Of Contents
- .tre - directory tree file (PC-Tools)
- .trm - terminal settings (Windows 3.x)
- .tut - tutorial
U
- .ub - audio file (unsigned byte)
- .uhs - Universal Hint System (binary file)
- .uif - long prompts for windows (WordPerfect for Win)
- .unx - text file containing UNIX specific info
- .upd - program update info
- .usr - user database file (Procomm Plus - Turbo C++ tour)
V
- .vbx - Visual Basic eXtension (Visual Basic)
- .vga - VGA display driver
- .vga - VGA display font
- .vgd - VGA display driver (Generic CADD)
- .vid - MS-DOS Shell Monitor file (MS-DOS 5)
- .vid - bitmap graphics (YUV12C M-Motion Frame Buffer)
- .vid - screen device driver (Word)
- .voc - digitized samples (Creative Voice file)
- .vst - Truevision Vista bitmap graphics
- .vue - animation (3D Studio)
- .vxd - Windows 3.x virtual device driver (QEMM)
W
- .w31 - startup file (Windows 3.1)
- .wav - Waveform audio file (RIFF WAVE format)
- .wbf - MS Windows Batch File (Catch)
- .wbt - batch file (WinBatch)
- .web - WEB source code file
- .woa - swap file (Windows 3.x)
- .wrs - Windows Resource eg. printer driver (WordPerfect for Win)
X
- .xbm - X11 Bitmap graphics
- .xll - Excel Dynamic Link Library (MS Excel)
- .xmi - compressed eXtended MIdi music
- .xwd - X Window System window dump image graphics (SDSC Image Tool)
- .xx - compressed file ASCII archive created by XXENCODE (uuexe515.exe)
- .xxe - compressed file ASCII archive created by XXENCODE (uuexe515.exe)
Z
- .zip - compressed file archive created by PKZIP (pkz204g.exe)
- .zoo - compressed file archive created by ZOO (zoo210.exe)
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