file extension Windows/OS2/Apple/Unix/Dos

File ExtensionsWindows/OS2/Apple/UNIX

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B = Basic language source code file
B = Lotus APPLAUSE Batch list
B = Modula-3 base program
B!K = Game: Ms flight Scenery file
B&W = 1st Reader bitmap image (mono binary screen image)
B&W = Black & White bitmap image (atari - mac)
B&W = ImageLab image format
B&W = 1st Reader : Bitmap graphics (Mono binary screen image)
B00 = Graphics
B08 = wisosparbuch2008file open with: "%ProgramFiles%\WISO\Sparbuch 2008\wiso2008.exe" "%1"
B09 = wisosparbuch2009file open with: "%Applications%\WisoSpar2009\wiso2009.exe" "%1"
B16 = PCO image format
B1J = BookJones
B1N = 1st Reader binary bitmap screen image mono and color
B1S = BookSmith
B30 = Ventura Publisher Printer font (JLaser - Cordata)
B32 = Msdos Bcc file
B3D = 3D Builder File
B3D = B3D image format
B4 = Helix Nuts and Bolts file
B44 = Misc
B4F = Burn4Free project open with: "%Root%\Tools\Burn4Free\Burn4Free.exe" "%1"
B4S = Winamp.PlayList open with: "%ProgramFiles%\Winamp\winamp.exe" "%1"
B64 = StuffItEncoded encoded file archive (ascii base64 MIME)
B8 = Cubicomp PictureMaker red channel image data (24bit 3D animation)
B8 = PicLab bitmap image (one byte per pixel) plane two
B_T = Eru/erd file
B_W = Black & White bitmap image (atari - mac)
B_W = ImageLab image format
BA$ = MS compressed BAS; decompress with UNPACK.EXE
BAAN = baan database p-code object format
BABL = (MAC FILE_TYPE) DeBabelizer
BAC = Backup
BAD = BAD file
BAD = Oracle BAD File
BAD = Rime Mailer Address File
BAG = AAICWpro autoresponder file
BAG = Aol6 organize file
BAK = backup file
BAL = BAL Borland Programming Language Source
BAL = Ballade music score sound file
BAN = Interdiction
BAR = dBASE Application Generator horizontal bar menu object file
BAR = Unix BAR compressed file archive
BART = (MAC FILE_TYPE) Microsoft Border Art File
BAS = Basic source code
BASE64 = BASE64 MIME encoding/RFC2045
BAT = MS-DOS batch file (Executable)
BB = Papyrus database backup
BBK = bak file
bbkr = (MAC FILE_TYPE) Installer Script
BBL = TeX/BibTeX BiBLiographic reference
BBM = Deluxe Paint bitmap image, used for animations
BBNBG = BBN BitGraph terminal Display Pixel Data (DPD) sequence
BBNNG = Bitmap image (BBN BitGraph terminal Display Pixel Data (DPD) sequence)
bbox = (MAC FILE_TYPE) Classic Support File
BBP = Bezier surface file
BBS = Bulletin Board System Text
BBS = Hudson-style messagebase (FTN software)
BBTL = (MAC FILE_TYPE) BBEdit Tool Palette
BBXT = (MAC FILE_TYPE) BBEdit Extension
BC = Mikmak 203 file
BC3 = (make-)file for Bcc 3
BCB3 = (make-)files for Bc3
BCC = Borland c++ file/makefile
BCD = Turbo Pascal Dos file
BCF = ConfigSafe Snapshot Index
BCH = Datalex EntryPoint 90 datafile (Phoenix Soft)
BCH = dBASE BatCH process object file
BCK = VMS/VAX BaCKup
BClf = (MAC FILE_TYPE) Adobe Color Table
BCM = Ms Works Communications script backup
BCO = Bitstream outline font description
BCP = Borland C++ makefile
BCPIO = Mime: application/x-bcpio
BCS = Windows95 browse information
BCT = Clarion backup dictionary
BCW = Borland C++ 4.5 workspace (Environment settings)
BDB = Ms Works database backup
BDC = Lingvo dictionary
BDCFF = C64 BoulderDash Construction Kit File Format
Bdct = (MAC FILE_TYPE) BBEdit Dictionary
BDD = BRender device driver
BDF = Adobe Glyph Bitmap Distribution Format stores Adobe screen fonts as ASCII
BDF = Bupdate binary update file
BDF = Data Egret
BDF = NuGraf Scene file
BDF = West Point Bridge Designer
BDR = MS Publisher Document Border
BDT = Lingvo dictionary
BEE = Beeline-AIR System file
BEN = Syssoft Sandra file
BER = German Bericht = report file
BES = Beschreibung : German description
BEX = PGP Binary EXtracted public key
BEXPK = PGP Binary EXtracted Public Key
BEZ = Bezier surface file
BEZ = Bitstream outline font description
BF2 = Bradford 2 font
BFA = Blowfish-encrypted File
BFB = Ralcgm file
BFC = Windows 95 Briefcase document
BFF = AIX Backup Format
BFF = WorldToolKit Neutral File Format (binary virtual reality file)
BFL = BFLI image format
BFL = Game: colin Mc Rae car race Game Bigfiles file
BFLI = BFLI image format
BFM = Unix font metrics (Frame)
BFX = BitFax picture
BG = Backgammon for Windows game
BG = Lotus Agenda File
BGA = OS/2 graphic array (another bmp: Ms Paint .BMP )
BGB = MS Chat Background Graphic
BGF = MSI BGF chemical modeller input file
BGI = Borland DOS 16-bit graphics video device driver
BGL = Flight Simulator Scenery data file
BGT = Quicken 2002 inet common file
BGX = Bc45 Bgi file
BH2 = OASYS Presentation : Presentation
BH2 = Mime: application/vnd.fujitsu.oasysprs
BH= BlakHole File (like zip files) Program: PowerArchiver (www.powerarchiver.com)
BHF = pcAnywhere Host
BHI = Partminer Lib file
BHL = Partminer Lib file
BHX = BinHex compressed file ascii archive
BI = binary file
BI = Progress Database Before Image File
BI = Visual Basic for DOS Include file
BI$ = MS compressed BI; decompress with UNPACK.EXE
BI7 = Rukus 110 file
BIB = BIBliography (ASCII)
BIB = Papyrus database - not compatible with TeX format
BIB = TeX/BibTeX literature database
BIE = Image JBIG
BIF = Binary Information File (ASCII file describing image)
BIF = byLight image format
BIF = GroupWise initialization file
BIF = Image Capture board bitmap image (b&w Binary Image Format)
BIF = Trados TagEditor bilingual file
BIFF = XITE - X-based 2d/3d format image format
BIFF = XLITE 3D file
BIG = Chinese text (old version)
BIG = Michelin (autoroute maps) image format
BIG5 = Chinese text (old version)
BIK = BioCharter Profile Backup
BIL = Satellite image (8bit GIS tape format) (SPOT image)
BIN = Audio format(short ints,no header)
BIN = Binary file
BIN = MacBinary archive format often used on Macintosh
BIN = machine language
BIN = Micrografx Designer 7 Project Image
BIN = Mime: application/mac-binary
BIN = Mime: application/macbinary
BIN = Mime: application/octet-stream
BIN = Mime: application/x-binary
BIN = Mime: application/x-macbinary
BIN = SGI Powerflip
BIN64 = Binary encoding method (used by mime complient mail readers)
BINA = (MAC FILE TYPE) Text file saved as Word DOS or Word Windows file by Word Mac 5
BINA = (MAC FILE_TYPE) DOS Binary File
BiNA = (MAC FILE_TYPE) Netscape Mail File
BIO = BioCharter Profile
BIO = OS/2 BIOS
BIORAD = Biorad confocal file : Graphics
BIP = ArcView : image file (band interleaved by pixel)
BIRD = algs7 file
BIT = X11 bitmap image
BITMAP = TheGIMP20 open with: "%ProgramFiles%\GIMP-2.0\bin\gimp-win-remote.exe" gimp-2.2.exe "%1"
BIX = BIX compressed file archive
BIZ = BizTalk compatible schema
BJK = Scanner Recognita file
BK = FrameMaker BookFile Document
BK = JetFax faxbook
BK = LinguAssist data
BK = sometimes used for backup versions
BK! = WordPerfect for Win document backup
BK$ = sometimes used for backup versions
BK1 = WordPerfect for Win backup
BK2 = WordPerfect for Win backup
BK3 = WordPerfect for Win backup
BK4 = WordPerfect for Win backup
BK5 = WordPerfect for Win backup
BK6 = WordPerfect for Win backup
BK7 = WordPerfect for Win backup
BK8 = WordPerfect for Win backup
BK9 = WordPerfect for Win backup
BKA = bkaFile open with: "%ProgramFiles%\Hama\Hama Digital Software Suite\PhotoBase 4.5\PhotoBase.exe" "%1"
BKF = msbackupfile open with: ntbackup.exe
BKI = IBM BookManager Backup Index
BKM = DInfo.Bookmark open with: %Root%\Tools\D-INFO~1\dinfo.exe "%1"
BKMK = (MAC FILE_TYPE) Microsoft Bookmark File
BKP = Write/TurboVidion DialogDesigner BackuP file
BKR = Boardmaker : Document
BKS = IBM BookManager Read bookshelf backup
BKS = Ms Works spreadsheet backup
BKT = Zortech 3 tools Samples file
BKW = FontEdit mirror image of font set
BKY = bookkey - Bookmarks by Keywords(Bookmarks with associated keywords in bookkey-format)
BLA = Adobe Black Color Separation. CYA (Cyan), MAG (Magenta), YEL (Yellow)
BLB = DreamWorks Resource Archive
BLD = Basic Bloadable image
BLD = MegaPaint image format
BLD = Mime: application/bld
BLD = old Microsoft Developer Studio MAK
BLD2 = Mime: application/bld2
BLE = Photoline4 Blends file
BLG = ARCSOLO Backup Log
BLG = BibTex log
BLK = Alias Wavefront Image file
BLK = Amiga IFF ILBM image
BLK = Lightscape Block Library file
BLK = WordPerfect temporary file
BLL = Borland Delphi localization Information
BLL = Virus European A-Worm!!! (run virus checker!)
BLORB = Blorb: A Z-Machine Resource Collection Format Standard
blrb = (MAC FILE_TYPE) Extensions Manager Info
BLT = Wordperfect for DOS
BLW = ArcView : world file for bil image
BlWd = (MAC FILE_TYPE) Claris HomePage
BLY = Fifa World Cup game data fe art Loadgame file
BM = Mime: image/bmp
BM = X Windows system Bitmap image
BM$ = Modem Bitware Fax disk2 file
BM1 = Apogee BioMenace game data file
BM_ = Mumath 30 file
BM_ = Webcd fread file
BMC = "IBM Voice Type" languages Newuser file
bMDT = (MAC FILE_TYPE) Spr Boomerang Prefs File
BMF = Corel Flow image format
BMF = Corel Gallery file
BMF = Corel graphics (Binary Material Format)
BMF = View3ds scene description
BMI = Buzz Instrument
BMI = Mime: application/vnd.bmi
BMIN = Batchmin Command chemical modeller output file
BMK = Bookmark file from Windows help
BML = Bookmark library (SyncURL)
BML = binary markup language, sim. to XML but binary, used in 3d
BMM = Tacmi Pixia palette file
BMP = Alpha Microsystem BMP image format
BMP = Mime: image/bitmap
BMP = Mime: image/bmp
BMP = Mime: image/x-bmp
BMP = Mime: image/x-windows-bmp
BMP = standard Windows Bitmap image (also OS/2 )
BMP24 = 24 color Bmp file
BMP_ = (MAC FILE_TYPE) Windows BitMap
BMPf = (MAC FILE_TYPE) Windows Bitm
BMPp = (MAC FILE_TYPE) Windows BitM
BMR = Bitmap Reference Code file
BMS = Backup Magic Backup Set
BMT = Ami Pro button image
BMW = BuzzPlay music with waves
BMX = Buzz music file
BMZ = Compressed Bmp file
BN = AdLib Instrument Bank file
BN_ = Ntgraph Ze32v215 file
BND = Game: Ms flight Panels file
BNF = "IBM Voice Type" languages map file
BNHQ = (MAC CREATOR CODE) BinHex (PC ext: HQX)
BNK = Adlib instrument Bank
BNK = Simcity game data
BNR = Banner - Poster graphics BaNneR
BOB = BOB bitmap image
BOBO = (MAC CREATOR CODE) Claris Works (word processor) (PC ext: CWK)
BOBO = (MAC CREATOR CODE) Claris Works text v. 1 to 5 (PC ext: CWK)
BOBO = (MAC CREATOR CODE) Claris Works
BOBO = (MAC FILE_TYPE) ClarisWorks
BOD = Game: roland garros tennis terrains file
BOF = "IBM Voice Type" languages tasks enroll file
BOL = MS Booasm Compressed Archive Library
BOM = Orcad Schematic Capture Bill of Materials File
BOO = Bootstrap (Kermit protocol binary file)
BOO = Encoded file archive (ASCII) (Boo)
BOO = IBM BookManager Book
BOO = Image file
BOO = Mime: application/book
BOOG = Boogie chemical modeller input file
BOOK = Adobe FrameMaker book
BOOK = Mime: application/book
BORLAND = (make-)file for Borland C
BOT = Buckett o' Tablature file (guitar partition)
BOX = Lotus Notes MailBOX
BOX = Mime: application/vnd.previewsystems.box
BOZ = Compressed file archive (bzip over zip)
BOZ = Mime: application/x-bzip2
BPC = Business Plan Toolkit chart
BPD = Data Designer Ddbac file
BPI = "IBM Voice Type" languages Newuser file
BPK = Mime: application/octet-stream
BPL = Borland Delphi 4 packed library
BPM = B's Pro Tracker v0.05 music/sound
BPP = Clarion Backup aPPlication
BPR = Borland project file
BPR = Reference count 01 file
BPS = Business Plan Toolkit
BPS = Ms Works document backup
BPT = Bitmap Master File
BPT = Corel Draw bitmap
BPW = ArcView : world file for bip or bmp images
BPX = Truevision Targa bitmap image
BQW = ArcView : world file for bsq image
BQY = BrioQuery file
BR = Bridge script
BR = Omnis7 data
BR1 = Wincmd file
BR3 = Bryce 3D Scene File
BRAIN = Msdev Common Addins file
BRC = Bryce 2 Scene File
BRD = Eagle layout file
BRF = BRieF (german/dutch for letter)
BRI = Basic Rate Interface
BRK = Brooktrout Fax-Mail
BRK = Mailer REXX script (The Brake!)
BRL = Ballistic Research Laboratory CAD
BRL-CAD = Ballistic Research Laboratory CAD
BRLCAD = Ballistic Research Laboratory CAD
BRO = Tree Professional Broadleaf Creator
BRP = Tree Professional Broadleaf Creator Image
BRT = Brooktrout 301 image format
BRT = Micrografx System4 Browser file
BRU = Photoline4 Brushes file
BRUSH = Bitmap image (Xerox Doodle Brush file)
BRW = financial institutions loan application file
BRX = file for browsing an index of multimedia options
Bry2 = (MAC FILE_TYPE) Bryce 2
BRZ = Dbbrz (Backup or Restore file)
BS = Ball and Stick chemical modeller input file
BS = Ball and Stick chemical modeller output file
BS = Printfox/Pagefox image format
BS1 = Apogee Blake Stone game data
BS2 = BS2 archive
BS2 = BS2 editor file
BS_ = MS Bookshelf find menu shell extension file
BSA = BSArc compressed file archive
BSAVE = Quickbasic BLOAD/BSAVE format
BSB = 2d Graphic
BSC = BINSCII Apple II file archive
BSC = Fortran Pwbrmake
BSC = Ms Developer Studio browser information file C++,Fortran
BSC = Object Boyan Script
BSD = bsd system file
BSD = Licency according to BSD-licency(licency.bsd)
BSDL = Boundary Scan Description Language
BSH = Mime: application/x-bsh
BSK = Bryce 4 File
BSN = Midi file
BSP = Half-life/TFC/CS Map
BSP = Quake map
BSQ = ArcView : image file (band sequential)
BST = BiblioTex file (BiblioTex = bibliography file for TeX)
BSV = BASIC Bsave Graphics
BSY = FTN soft BuSY flag
BT = virual terrain software
BTF = Bank check image and text data (Nations Bank)
BTF = Mime: image/prs.btif
BTFL = (MAC FILE_TYPE) Desktop DB
BTIF = Bank check image and text data (Nations Bank)
BTIF = Mime: image/prs.btif
BTL = Inmos BooTabLe file
BTM = 4DOS/NDOS batch file (Batch To Memory)
BTM = batch file used by Norton Utilities
BTN = JustButtons animated bitmap image format
BTN = Makeover Button, Buttonware
BTR = Btrieve Database File
BTR = MS Frontpage-related File
BTSK = (MAC FILE_TYPE) HyperCard Button Tasks
BTST = (MAC FILE_TYPE) Norton System Info Fil
BTW = Steuer2001 file
BUB = Ipix Spherical panorama
BUD = Quicken BackUp Disk
BUFR = Binary Universal Form for the Representation
BUFR = Meteorological data
BUG = Bugs and Problems file
BUGS = Generally bugs file
BUM = Poser Bump files image format
BUN = Audio (CakeWalk Audio Bundle file)
BUN = CakeWalk Audio Bundle file
BUP = Backup file
BUT = Button definitions (Buttons!)
BUY = Movie Data File
BV1 = WordPerfect for Win
BV2 = WordPerfect for Win
BV3 = WordPerfect for Win
BV4 = WordPerfect for Win
BV5 = WordPerfect for Win
BV6 = WordPerfect for Win
BV7 = WordPerfect for Win
BV8 = WordPerfect for Win
BV9 = WordPerfect for Win
BVA = Biovision motion file format
BVC = "IBM Voice Type" languages Newuser file
BVD = "ViGuard+net" anti Virus Prog
BVF = Irock Series software
BVH = Misc
BVI = "Ibm Voice Type" languages Newuser file
BVL = Micrografx Picture Publisher 8 textures file
BVS = BVS Solitaire Collection file
BW = Silicon Graphics image
BWB = Visual Baler spreadsheet application file
BWF = Broadcast wave file format
BWI = Blindwrite cd copier file
BWR = Kermit Beware buglist
BWS = Blindread/Blindwrite
BWT = Blindwrite cd copier file
BWU = Blindwrite cd copier file
BWV = Business Wave file
BY = Spice Pspice file
BYU = BYU Movie
BZ = BZIP archiv
BZ = bzip compressed file archive
BZ = Mime: application/x-bzip
BZ2 = BZIP2 archiv
BZ2 = bzip2 compressed file archive
BZ2 = Mime: application/x-bzip2
BZP = BZIP archiv
BZP2 = BZIP2 archiv
B~K = Backup file

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Universal dump-utility for non-destructive dump/list/search string etc
dump.zip


Select Extension by starting letter:

A- B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U -

V- W - X - Y - Z - OTHER - Allowed chars in Filenames - what is an extension?

 

If you find an extension missing, write! No guarantee given for completeness or correctness. If you feel an extension is outdated, write!
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Send extension data to: update@file-ext.4uj.org
Any questions for not listed extensions or "what program opens xxx": search@file-ext.4uj.org
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Compilation Copyright (c) 2002 R.Bitsch, Compilation Copyright (c) 2009,2010 R.Cooper-Bitsch