| File extension | Developer/Producer | File description |
|---|---|---|
| B file extension | N/A | BASIC Language Source Format |
| B!K file extension | Microsoft Studios | Microsoft Flight Simulator Scenery |
| B&W file extension | N/A | Bitmap Image |
| B00 file extension | VSO-Software | Blindwrite |
| B01 file extension | N/A | Blindwrite Image |
| B02 file extension | N/A | Blindwrite Image |
| B1 file extension | Catalina Group | B1 Compressed Archive |
| B16 file extension | N/A | PCO Image |
| B2 file extension | N/A | Progress Database |
| B24 file extension | David Pilling | Ovation Pro For RISC OS C Script |
| B25 file extension | David Pilling | Ovation Pro For RISC OS DDL |
| B26 file extension | David Pilling | Ovation Pro For RISC OS Style Sheet |
| B27 file extension | David Pilling | Ovation Pro For RISC OS Document |
| B2A file extension | N/A | Binary To ASCII (BTOA) Encoded Format |
| B2D file extension | CBS Interactive Inc. | Brutus2D Source Code |
| B2F file extension | RISCOS Ltd. | RISC OS Windows Metafile |
| B30 file extension | Corel Corporation | Ventura Publisher Printer Font |
| B3D file extension | Blitz Research | Blitz3D/Max/Plus Texture, Mesh Format |
| B3P file extension | Native Instruments, Inc. | Native Instruments Battery Preset |
| B4S file extension | Nullsoft | Winamp 3 Playlist Format |
| B4U file extension | Tuukka Salonen | Visual ReadMe |
| B5 file extension | MDBG | MDBG Chinese-English Dictionary |
| B5I file extension | VSO-Software | BlindWrite Image Format |
| B5L file extension | Smart Projects | BlindWrite Image |
| B5T file extension | VSO-Software | BlindWrite Image Format |
| B60 file extension | RISCOS Ltd. | RISC OS PNG Bitmap Image |
| B64 file extension | N/A | ASCIIi Base64 MIME Encoded Archive Format |
| B6I file extension | VSO-Software | BlindWrite Image Format |
| B6L file extension | VSO-Software | Blindwrite License |
| B6T file extension | VSO-Software | BlindWrite Table Of Contents Format |
| BA file extension | Scifer | Scifer Archive External Archive Format |
| BA1 file extension | Microsoft Corporation | Microsoft Windows Media Center Report Log |
| BABL file extension | Automated Media Processing Solutions | DeBabelizer |
| BAC file extension | Avantrix | Backup Plus Backup Format |
| BACK file extension | N/A | RMCProfile Coefficient |
| BACKUP file extension | N/A | Android Backup Format |
| BACKUPDB file extension | Apple | Apple Time Machine Backup Folder Format |
| BAD file extension | Microsoft | Microsoft Exchange Badmail Format |
| BADONGO file extension | Badongo.com | Badongo Information Service |
| BAF file extension | Electronic Arts, Inc. | Battlefield 2 Animation |
| BAFL file extension | Burnaware Technologies | BurnAware Free Compilation Format |
| BAG file extension | N/A | AAICWpro Autoresponder |
| BAI file extension | BID2WIN Software Inc. | BUILD2WIN Add-in |
| BAK file extension | N/A | Backup Format |
| BAK2 file extension | Microsoft Corporation | Microsoft FrontPage |
| BAK3 file extension | CRYTEK | Crysis Backup |
| BAK~ file extension | AbiSource | AbiWord Auto-saved Document Format |
| BAL file extension | N/A | Borland Programming Language Source Code |
| BAM file extension | N/A | Bobs Adlib Music |
| BAMBOOPAPER file extension | Wacom Company, Limited | Bamboo Document |
| BAMP file extension | Blumentals Solutions SIA | Easy Button & Menu Maker Project |
| BAN file extension | Ai Research | MegaHAL Non-keyword List |
| BAND file extension | Apple | GarageBand Music Project Format |
| BAP file extension | Blaze Audio | Blaze RipEditBurn Audio Wave Information Format |
| BAR file extension | Microsoft | Age Of Empires / Age Of Mythology Game Format |
| BAS file extension | N/A | Basic Source Code Format |
| BASEBINARY file extension | Apple, Inc. | Apple Mac OS X AirPort Base Station Binary |
| BASECONFIG file extension | Apple, Inc. | AirPort Utility Setting |
| BASEPROJ file extension | Heracle BioSoft | DNA Baser Sequence Aligner Project |
| BASERPROJ file extension | Heracle BioSoft | DNA Baser Project Format |
| BASEX file extension | BaseX Team | BaseX Data Format |
| BASH file extension | Apple, Inc. | Unix Shell Script (bash) |
| BASHRC file extension | The GNU Project | Bash Shell Startup Script Configuration Format |
| BASH_HISTORY file extension | The GNU Project | Bash History Format |
| BASH_LOGIN file extension | GNU Project | Unix Shell Script (bash) |
| BASH_LOGOUT file extension | GNU Project | Unix Shell Script (bash) |
| BASH_PROFILE file extension | The GNU Project | Bash Interactive Login Shell Format |
| BASIN file extension | U.S. Army Corps of Engineers | HEC-HMS Basin Model Settings |
| BAT file extension | Microsoft | Batch File (executable) |
| BATCH file extension | Sierra Entertainment, Inc. | Switchball Game Data |
| BAU file extension | Sun Microsystems | OpenOffice.org Configuration Format |
| BAV file extension | RITLABS | AVG Bat! Plugin Format |
| BAW file extension | BrainLED | BrainLED AlfaWave Session |
| BAY file extension | Casio | Kodak/Roper Bayer Picture Sequence Format |
| BAZ file extension | ACCEO Solutions Inc. | Acomba Accounting Suite Backup |
| BA_ file extension | Microsoft | Renamed BAT Format |
| BB file extension | Blitz Research | Blitz Basic Source Code Format |
| BB2 file extension | N/A | XBBS-OS/2, XGROUP, AV, ZTree Archiver Control |
| BB3 file extension | WildTangent | BlasterBall 3 Level Format |
| BBA file extension | Ubisoft Entertainment S.A. | BlueByte Archive |
| BBB file extension | Research In Motion | BlackBerry Backup (post 2012) Format |
| BBC file extension | N/A | BBC BASIC For Windows |
| BBCD file extension | BobCAD-CAM | BobCAD-CAM Document |
| BBE file extension | MindGenius Ltd. | MindGenius Brainbloom |
| BBF file extension | ScriptBasic Project Team | ScriptBasic Binary |
| BBFW file extension | Apple, Inc. | ITunes Firmware |
| BBG file extension | CyberSports, Inc. | CyberSports For Basketball Game |
| BBI file extension | Ventyx | LinkOne Data |
| BBK file extension | N/A | TreePad Backup |
| BBL file extension | Oren Patashnik | TeX/BibTeX Bibliographic Reference Format |
| BBLM file extension | Bare Bones Software | BBEdit Language Module |
| BBLX file extension | Rick Meyers | E-Sword Bible |
| BBPROJECT file extension | Bare Bones Software | BBEdit Project Format |
| BBPROJECTD file extension | Bare Bones Software | BBEdit Project Format |
| BBRKPUZZLE file extension | Juan Trujillo | Puzzle |
| BBRKSAVE file extension | Juan Trujillo | Puzzle Started Status |
| BBS file extension | N/A | Bulletin Board System Text Format |
| BBT file extension | Procedimientos-Uno, S.L. | BTwin Local Database |
| BBTL file extension | Bare Bones Software | BBEdit Tool Palette |
| BBV file extension | PPLive Inc. | PPLive |
| BBW file extension | PG Music Inc. | Band-in-a-Box Nterface |
| BBX file extension | Neil Fraser | BrainBox Neural Network |
| BBXT file extension | Bare Bones Software | BBEdit |
| BBZ file extension | Bellshare | BeBuzz Backup Format |
| BC file extension | BitComet | BitTorrent Unfinished Download Format |
| BC! file extension | BitComet | Bittorrent Unfinished Download Format |
| BC5 file extension | N/A | Impression Document |
| BC6 file extension | Cashflow Manager Pty Ltd. | Cashflow Manager 2006 Backup |
| BC7 file extension | Cashflow Manager Pty Ltd. | Cashflow Manager 2007 Backup |
| BCA file extension | Nemetschek AG | Allplan Backup Catalog |
| BCB file extension | Embarcadero Technologies, Inc. | Borland C++ Builder |
| BCC file extension | Broderbund | Calendar Creator Customized Data Format |
| BCD file extension | Microsoft | Microsoft Windows Boot Configuration Format |
| BCF file extension | Belltech Systems | Business Card Designer Pro Business Card Design Format |
| BCH file extension | Phoenix Software International | Datalex Entrypoint 90 Data |
| BCI file extension | Belarc | Belarc Advisor Computer Profile Report |
| BCK file extension | N/A | VMX Backup Format |
| BCKP file extension | Lavasoft | Ad-Aware Quarantined Format |
| BCL file extension | Illumina | Illumina CASAVA Base Call Format |
| BCM file extension | Microsoft | Microsoft Works Communications Script Backup Format |
| BCMX file extension | Microsoft | Microsoft Outlook Business Contact Manager Customization Format |
| BCN file extension | bizcardpro.com | Business Card Design |
| BCP file extension | Borland | Borland C++ Makefile |
| BCR file extension | PVT AG | Map&guide Station List |
| BCS file extension | Boland | Boland Calibration Settings Format |
| BCT file extension | Adobe Systems | Adobe Bridge Cache Format |
| BCW file extension | Micro Focus International plc | Borland C++ Workspace |
| BCX file extension | Systeam | Beam Report Standard Definition |
| BD file extension | N/A | BenDaglish Audio |
| BD1 file extension | team MITEI | Map Block Location |
| BD2 file extension | Intuit Inc. | Lacerte Tax Tax |
| BDAE file extension | Gameloft | Gameloft Game Data Format |
| BDB file extension | Microsoft | Microsoft Works Database Backup Format |
| BDB2 file extension | Brainmaster Technologies, Inc. | BrainMaster Settings |
| BDC file extension | Babylon | Lingvo Dictionary Format |
| BDCM file extension | Microsoft Corporation | Microsoft Visual Studio BDC Model |
| BDCR file extension | Microsoft Corporation | Microsoft Visual Studio BDC Resource |
| BDCT file extension | Bare Bones Software | BBEdit Dictionary |
| BDD file extension | CARA | CARA Sound Radiation Data Format |
| BDE file extension | Parametric Technology Corporation | Pro/ENGINEER Temporary |
| BDF file extension | Adobe Systems | Adobe Glyph Bitmap Distribution Format |
| BDG file extension | E T Jones | Badge Designer 2000 Photo ID |
| BDH file extension | Borland Software Corporation | Silk Performer Include |
| BDI file extension | Parametric Technology Corporation | Pro/ENGINEER Temporary |
| BDIC file extension | Google Chrome Dictionary Format | |
| BDJO file extension | Oracle Corporation | Java BD-J Object Descriptor |
| BDK file extension | IBM | OS/2 Floppy Disk Image |
| BDL file extension | Parametric Technology | CoCreate Designer Bundle Format |
| BDM file extension | Sony | AVHCD Video Information Or Index Format |
| BDMV file extension | Blu-ray Disc Association | Blu-ray Information Format |
| BDOC file extension | SK.ee | DigiDoc Client Container |
| BDOF file extension | N/A | Mario Kart Mod Effect |
| BDP file extension | Microsoft | Microsoft Exchange Diagnostic Message |
| BDR file extension | Microsoft | Microsoft Publisher Border Format |
| BDS file extension | Computer Aided Development Corporation Limited | Cadcorp SIS Base Dataset |
| BDSGROUP file extension | Embarcadero Technologies, Inc. | BDS Project Group |
| BDSPROJ file extension | Embarcadero Technologies | BDS Project Format |
| BDT file extension | ABBYY | Lingvo Dictionary |
| BDT2 file extension | BEEDOCS | BEEDOCS Timeline 3D Timeline Document Format |
| BDT3 file extension | BEEDOCS | BEEDOCS Timeline 3D Timeline Document Format |
| BDTD file extension | Oracle Corporation | Java Sun Binary DTD |
| BDTP file extension | N/A | BaiduPlayer Media |
| BDV file extension | Softwin | BitDefender Vault |
| BDW file extension | Snowmint Creative Solutions LLC | Budget Data |
| BDX file extension | Softwin | BitDefender |
| BDY file extension | Alan Morton | DMAP Boundary |
| BEA file extension | The Beamer Project | Beamer Song |
| BEAM file extension | Ericsson | Compiled Erlang Code Format |
| BEAN file extension | Bean | Bean Document Format |
| BEB file extension | Clint Garrity | EEC Analyzer |
| BED file extension | UCSC | UCSC BED Annotation Track Format |
| BEE file extension | Andrew Filinsky | Bee Archiver Compressed Archive |
| BEH file extension | School of Aquatic & Fishery Sciences, University of Washington | CRiSP Calibration |
| BEJEWELED2DELUXESAVEDGAME file extension | Big Fish Games | Bejeweled 2 Deluxe Save Game Format |
| BEK file extension | N/A | Shanda Bambook E-book |
| BEL file extension | The Beamer Project | Beamer Layout |
| BEN file extension | SiSoftware | SiSoftware Sandra |
| BEP file extension | The Beamer Project | Beamer Playlist |
| BES file extension | Bitter End Systems | MOBY Database |
| BET file extension | N/A | BETA Source Format |
| BEVEL file extension | Neuber Software | FontTwister Bevel |
| BEX file extension | PGP Corporation | PGP Binary Extracted Public Key |
| BEXPK file extension | PGP Corporation | PGP Binary Extracted Public Key |
| BFA file extension | N/A | Blowfish-encrypted Format |
| BFB file extension | Microsoft Studios | Zoo Tycoon 2 Game Model |
| BFC file extension | N/A | Microsoft Windows 95 Briefcase Document Format |
| BFD file extension | Various Linux developers | Linux BFD Rules Configuration |
| BFE file extension | Johnny Shelley | Bcrypt - BlowFish File Encryption |
| BFF file extension | IBM | AIX Backup Format |
| BFFM file extension | Microprose | B-17 Flying Fortress: The Mighty 8th Game |
| BFG file extension | Big Fish Games | Mario Kart Mod Effect Format |
| BFI file extension | Statistics Netherlands | Blaise Index |
| BFL file extension | N/A | BFLI Image Format |
| BFLI file extension | N/A | BFLI Image Format |
| BFM file extension | Terminal Reality | Terminal Reality Model Format |
| BFMV file extension | Martjin Buijs | BfMeshView Workspace |
| BFONT file extension | Electronic Arts, Inc. | Need For Speed SHIFT Font |
| BFP file extension | Quest Software, Inc. | Benchmark Factory Project |
| BFR file extension | SmartWare Corporation | SmartWare Backup Report |
| BFS file extension | Bugbear Entertainment | SmartWare Backup Sort Definition Format |
| BFT file extension | SmartWare Corporation | SmartWare Backup Transaction Definition |
| BFW file extension | SmartWare Corporation | SmartWare Backup Cross-tab |
| BFX file extension | Cheyenne | Bitware BitFax Format |
| BGA file extension | N/A | OS/2 Graphic Array |
| BGCF file extension | Belltech Systems, LLC | Greeting Card Design |
| BGD file extension | Esri | ESRI Binary Raster Definition |
| BGEO file extension | Side Effects Software Inc. | Houdini Binary Geometry Format |
| BGF file extension | ZEMAX Development Corporation | ZEMAX Binary Glass Catalog |
| BGI file extension | Microsoft | BGInfo Configuration Format |
| BGL file extension | Babylon | Babylon Glossary Format |
| BGM file extension | Tom Mulgrew | Basic4GL 3D Object |
| BGO file extension | BigOven.com | Bigoven Recipe Card |
| BGR file extension | Promixis | Girder Binary Plugin |
| BGT file extension | FKJ Software | Graphic Accounts Budget Data Format |
| BGUI file extension | Electronic Arts, Inc. | Need For Speed SHIFT GUI |
| BGV file extension | Bonanza AB | BonanzaGraf Financial Presentation |
| BGW file extension | SQUARE ENIX CO. | Final Fantasy Music |
| BGZ file extension | Wouter van Oortmerssen | Blood Frontier Map Format |
| BH file extension | ZipTV | ZipTV BlakHole Archive File Format |
| BH3 file extension | Microsoft Studios | Rise Of Nations Unit Graphic |
| BHA file extension | Microsoft Studios | Rise Of Nations Unit Graphic |
| BHF file extension | Symantec Corporation | PcAnywhere Host |
| BHO file extension | Louis Kessler | Behold Settings Format |
| BHP file extension | AppSmiths | BHP Survey Tool Data |
| BHS file extension | Microsoft Studios | Rise Of Nations Script |
| BHX file extension | N/A | BinHex Compressed File ASCII Archive |
| BI file extension | Progress Software | Progress Database Before Image |
| BI? file extension | Terry A. Davis | LoseThos Binary Executable |
| BIB file extension | N/A | BibTeX Document Format |
| BIBTEX file extension | Sublime HQ Pty Ltd | BibTeX Document |
| BIC file extension | N/A | Civilization III Game Scenario Format |
| BID file extension | Avontus Software Corporation | BidMaker |
| BIDULE file extension | Plogue | Plogue Bidule Sound Layout Format |
| BIE file extension | N/A | JBIG Image |
| BIF file extension | N/A | Binary Information Format |
| BIFX file extension | BeLight Software | Get Backup Project |
| BIG file extension | Electronic Arts | Electronic Arts Game Resource Package Format |
| BIK file extension | N/A | BINK Video Format |
| BIKEY file extension | Bohemia Interactive | Bohemia Interactive Key |
| BIL file extension | ESRI | ArcView Band Interleaved By Line Image Format |
| BIM file extension | Bytessence | Bytessence InstallMaker Project Format |
| BIMD file extension | Automated Architecture, Inc. | Blue Ink Meta-data Export |
| BIMX file extension | Graphisoft | ArchiCAD BIMx 3D Scene |
| BIN file extension | N/A | Macbinary II Encoded Format |
| BIN3 file extension | National Instruments Corporation | LabVIEW Data |
| BINA file extension | Microsoft Corporation | Microsoft Word 5 For Mac Document |
| BINARYCOOKIES file extension | Apple, Inc. | Safari Browser Cookies Package |
| BINUI file extension | Ubisoft Entertainment S.A. | Call Of Juarez Game Menu |
| BIO file extension | N/A | OS/2 BIOS Format |
| BIOEXCESS file extension | Egis Technology Inc. | MyWinLocker Protected |
| BIONIX file extension | BioniXWallpaper.com | Bionix Wallpaper List Format |
| BIOT file extension | Ripplon Software Inc. | BiotSavart Magnetic Design |
| BIP file extension | N/A | Character Studio Biped Format |
| BIQ file extension | N/A | Civilization 3 Scenario Format |
| BIT file extension | Xilinx | Xilinx Integrated Software Environment Bitstream Format |
| BITCFG file extension | PassMark Software Pty Ltd | Passmark Configuration |
| BITMAP file extension | N/A | X Window System Bitmap Image |
| BITPIM file extension | BitPim | BitPim Configuration Format |
| BIX file extension | N/A | Civilization III Scenario Format |
| BIZ file extension | Broderbund | Print Shop Business Card Format |
| BIZDOCUMENT file extension | Actuate Corporation | Actuate BusinessReport Studio Document |
| BJF file extension | NTI Corporation | NTI Backup Now Related |
| BJK file extension | Statistics Netherlands | Blaise |
| BJO file extension | Janet Davis Music Company | Instrument Tablature Format |
| BK file extension | N/A | Adobe FrameMaker Book Format |
| BK! file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK0 file extension | Aspen Technology, Inc. | Aspen HYSYS Backup |
| BK1 file extension | Autodesk | Autodesk AutoCAD Backup Format |
| BK2 file extension | Microsoft | Windows Indexing Service Data Format |
| BK3 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK4 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK5 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK6 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK7 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK8 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BK9 file extension | Corel Corporation | Corel WordPerfect Document Backup |
| BKB file extension | VariCAD, s.r.o. | VariCAD Drawing |
| BKC file extension | Softland | Backup4all Catalog Format |
| BKD file extension | N/A | Book Library Local Dos Exploit |
| BKF file extension | N/A | Microsoft Backup Format |
| BKG file extension | N/A | UWXAFS Project Binary Format Data |
| BKI file extension | IBM | IBM BookManager Backup Index |
| BKK file extension | BookBuddi | BookBuddi EBook Format |
| BKMK file extension | Yummy Software | Yummy FTP Bookmark Format |
| BKO file extension | Wisco | Wisco Backup Outlook Backup |
| BKP file extension | Zaplots | Backup Format |
| BKR file extension | N/A | ReplaceEm File Set |
| BKS file extension | Microsoft | NTBackup Settings Format |
| BKU file extension | The Sage Group plc | Timeslips Backup |
| BKUP file extension | N/A | Wherigo Cartridge Backup Format |
| BKW file extension | N/A | FontEdit Image |
| BKY file extension | SmartWare Corporation | SmartWare Backup Keyboard |
| BKZ file extension | NCH Software | FileFort Backup |
| BLA file extension | Adobe Systems Incorporated | Adobe Black Colour Separation |
| BLACKHAWKSTRIKER2 file extension | WildTangent | Blackhawk Striker 2 Saved Game |
| BLACKHAWKSTRIKER2SAVEDGAME file extension | WildTangent, Inc. | Blackhawk Striker 2 Saved Game |
| BLASTERBALL2DRM3SAVEDGAME file extension | WildTangent, Inc. | Blasterball 2 Save Game |
| BLASTERBALL3SAVEDGAME file extension | WildTangent | Blasterball 3 Save Game Format |
| BLB file extension | N/A | Blob Format |
| BLD file extension | Cadsoft | Envisioneer Professional Model Format |
| BLEND file extension | The Blender Foundation | Blender 3D Data Format |
| BLEND1 file extension | Blender | Blender Backup Format |
| BLEND2 file extension | Blender | Blender Document Backup Format |
| BLF file extension | Microsoft | CLFS Base Log Format |
| BLG file extension | Microsoft | Microsoft Windows Binary Performance Log Format |
| BLI file extension | Thomson | Thomson Speedtouch Series WLAN Router Firmware Format |
| BLIGHT file extension | N/A | Mario Kart Mod Effect |
| BLK file extension | Autodesk | AutoCAD Block Template Format |
| BLKRT file extension | Block Artist | Block Artist Image Format |
| BLL file extension | N/A | Borland Delphi Localization Information |
| BLM file extension | N/A | Eurolink Comma Separated Value |
| BLN file extension | Golden Software | Golden Software Blanking File Format |
| BLOB file extension | Valve | Steam Client Registry Format |
| BLOCKPLT file extension | LEGO | LEGO MINDSTORMS NXT Palette Format |
| BLOGTHIS file extension | Microsoft | Microsoft Windows Writer BlogThis Data Format |
| BLP file extension | Blizzard Entertainment | Blizzard Game Texture Format |
| BLS file extension | Blockland | Blockland Saved Game |
| BLT file extension | AOL | AIM AOL Instant Messenger Saved Buddy List |
| BLU file extension | N/A | FileMaker Pro Runtime Extension Format |
| BLUE file extension | CCP | EVE Online Texture |
| BLUEBUTTON file extension | U.S. Department of Veterans Affairs | VA Blue Button Text |
| BLV file extension | Ubisoft Entertainment S.A. | Might And Magic 6/7 Dungeon Level Geometry |
| BLW file extension | Adobe Systems | Adobe Photoshop Black And White Presets Format |
| BLX file extension | Magellan Navigation, Inc. | Magellan MapSend Map Data |
| BLY file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Fe Art Load Game |
| BLZ file extension | Nokia | Nokia N-Gage Game Format |
| BM file extension | N/A | X Windows System Bitmap Image |
| BM2 file extension | N/A | Subspace/Continuum Bitmap Graphic Format |
| BM3 file extension | Sony Ericsson | Sony Ericsson Backup Format |
| BMA file extension | Alexander Cherenkov | Compressed Archive |
| BMB file extension | Parametric Technology Corporation | Pro/ENGINEER Temporary |
| BMC file extension | Microsoft | Microsoft Terminal Server Client Bitmap Cache Format |
| BMD file extension | WEBZEN | MU Online Game Data Format |
| BMD5 file extension | EdwinSoft | BookmarkingDaemon |
| BME file extension | Konami | Konami Beatmania Music Simulator Format |
| BMF file extension | Corel | Corel Gallery Binary Material Format |
| BMG file extension | Nintendo | Mario Kart Wii Message Format |
| BMI file extension | Autodesk | 3d Studio Max Plugin |
| BMK file extension | CyberLink | PowerDVD MovieMark Bookmark Format |
| BML file extension | N/A | Bean Markup Language Format |
| BMM file extension | Isao Maruoka | Tacmi Pixia Palette |
| BMML file extension | Balsamiq Studios, LLC | Balsamiq Mockups Graphic |
| BMO file extension | Siemens AG | SIMATIC WinCC Script |
| BMP file extension | N/A | Standard Windows Bitmap Image (also OS/2) |
| BMP24 file extension | N/A | Bitmap Graphic |
| BMPENX file extension | Egis Technology Inc. | Encrypted BMP |
| BMQ file extension | Acclaim Games Inc. | Re-Volt Texture |
| BMS file extension | Konami | Beatmania Music Simulator Format |
| BMT file extension | Alpha Software, Inc. | Alpha Five Image Library |
| BMU file extension | N/A | BioWare Music Unit |
| BMW file extension | Buzzmachines | BuzzPlay Music With Waves |
| BMX file extension | Siemens | Siemens Mobile Phone Animation Format |
| BMZ file extension | Valve | Portal Map Format |
| BN4 file extension | N/A | Yamaha DX100 Voice |
| BNA file extension | Safe Works | Barna Word Processor Document |
| BNC file extension | Bojanov Software | Bojanov Encryptor Encrypted |
| BND file extension | IBM | DB2 Bind Format |
| BNDL file extension | N/A | Bundle File Format |
| BNF file extension | IBM | IBM Voice Type Languages Map |
| BNG file extension | The Bingo Maker Team | Bingo Maker Bingo Data Template Format |
| BNHQ file extension | Yves Lempereur | BinHex Archive |
| BNI file extension | Blizzard Entertainment, Inc. | Blizzard Battle.Net Icon |
| BNK file extension | Eden Games | Test Drive Unlimited Game Data Format |
| BNL file extension | Cadence Design Systems, Inc. | MicroSim PCBoard Netlist |
| BNP file extension | Sony | Sony HD Camera System Format |
| BNR file extension | Nintendo Co., Ltd. | Nintento Wii Homebrew |
| BNS file extension | Valve | Portal Script Format |
| BNT file extension | MindArk PE AB. | Entropia Universe Game Archive |
| BNY file extension | N/A | Binary Ll Format |
| BNZ file extension | The Bingo Maker Team | Bingo Maker Bingo Template Or Bingo List Update Format |
| BOB file extension | N/A | BOB Raytracer Bitmap Image |
| BOBO file extension | Apple, Inc. | ClarisWorks |
| BOBTHEBUILDERSAVEDGAME file extension | Brighter Minds Media | Bob The Builder: Can Do Zoo Save Game |
| BOC file extension | E-Press | E-Press EasyWord Big Document Format |
| BOCHSRC file extension | The Bochs Project | Bochs Configuration |
| BOD file extension | Egosoft | X3 Reunion Ship |
| BOE file extension | Microsoft Corporation | Microsoft Outlook Express Backup |
| BOF file extension | IBM | IBM Voice Type Languages Tasks Enroll |
| BOH file extension | Paradox Interactive | Europa Universallis 2 Game Data |
| BOK file extension | Pearson Education | TestGen Test Bank Format |
| BOL file extension | Nintendo Co., Ltd. | Mario Kart Course Setup |
| BOM file extension | Apple | Apple Mac OS X Bill Of Materials Format |
| BONDS file extension | M.Carson | Ribbons Bonds |
| BONK file extension | Bonk | Bonk Audio Format |
| BOO file extension | N/A | Microsoft Booasm.arc Encoded File Archive |
| BOOK file extension | Adobe Systems | Adobe FrameMaker Book Format |
| BOOKEXPORT file extension | Blurb | Booksmart Export Format |
| BOOKTEMPLATE file extension | Apple | IBooks Author Book Template Format |
| BOOKWORMDELUXESAVEDGAME file extension | Big Fish Games | Bookworm Deluxe Saved Game |
| BOOT file extension | Flexera Software | InstallShield Format |
| BOOTEFISIGNATURE file extension | Apple, Inc. | Bootefisignature Mac OS X System |
| BOOTSKIN file extension | Stardock | Microsoft Windows Boot Skin |
| BOOTSTRAP file extension | Adobe Systems Incorporated | Adobe HTTP Dynamic Streaming Bootstrap |
| BORLAND file extension | Micro Focus International plc | Borland C Makefile |
| BOS file extension | 3am Solutions (UK) Limited | Dynamite VSP Building Object Style |
| BOT file extension | Gabriel Interactive, Inc. | Robot Arena Game |
| BOX file extension | N/A | FoxMail E-mail Box |
| BOX3D file extension | BoxShot3D.com | Box Shot 3D Project |
| BOXER file extension | N/A | Boxer For Mac Game Archive |
| BOZ file extension | Julian Seward | BZIP Compressed Archive |
| BP file extension | The Database Managers, Inc. | DataFlex Business Process Object |
| BP0 file extension | SmartWare Corporation | SmartWare Backup Project |
| BP1 file extension | SmartWare Corporation | Smartware Backup Document |
| BP2 file extension | N/A | Autodesk AutoCAD Batch Plot Format |
| BP3 file extension | N/A | Autedesk AutoCAD Batch Plot Format |
| BP4 file extension | SmartWare Corporation | SmartWare Backup Project |
| BPA file extension | SimpleTech | StorageSync Backup Archive Format |
| BPB file extension | Sybase | PowerDesigner Business Process Backup Format |
| BPC file extension | TODAY Systems, Inc. | BuildPro |
| BPD file extension | Palo Alto Software | Business Plan Pro Data Format |
| BPDX file extension | Adobe Systems | Adobe Acrobat Catalog Batch PDX Format |
| BPF file extension | Infor Global Solutions | Baan ERP Document |
| BPG file extension | Borland | Delphi Project Group Format |
| BPI file extension | IBM | IBM Voice Type Languages New User |
| BPJ file extension | VISATON GmbH & Co. KG | Boxsim Simulation |
| BPK file extension | Nero | Nero SecurDisc Public Key Format |
| BPKEY file extension | Stichting Blender Foundation | Blender Publisher License Key |
| BPL file extension | N/A | AutoCAD R2000 Batch Plot |
| BPM file extension | Sybase | PowerDesigner Business Process Model Format |
| BPMC file extension | Bizagi | Bizagi Process Modeler |
| BPMN file extension | KAISHA-Tec Co. Ltd | Avantage Template |
| BPN file extension | GRAPHISOFT | ArchiCAD Backup Format |
| BPNUEB file extension | Hamed Mosadeq | Payame Noor University (PNU) E-book Format |
| BPO file extension | The Database Managers, Inc. | DataFlex Business Process Object |
| BPP file extension | SoftVelocity | Clarion Backup Application |
| BPR file extension | Embarcadero Technologies | Borland C++ Builder XML Project Format |
| BPS file extension | N/A | BPS Virus Format |
| BPSD file extension | AVANTRIX Inc. | Backup Plus |
| BPT file extension | Corel Corporation | CorelDRAW Bitmap Master |
| BPV file extension | BulletProof Business Plans, Inc. | BallPark Business Valuation Valuation Scenario |
| BPW file extension | Bitser | Bitser Password Format |
| BPX file extension | N/A | Truevision Targa Bitmap Image |
| BPZ file extension | Easy Blue Print | Easy Blue Print Library |
| BQF file extension | N/A | Backdoor.Win32.Ciadoor.bqf Trojan |
| BQW file extension | Esri | ArcView World |
| BQY file extension | Brio Software | BrioQuery Database Format |
| BR file extension | TigerLogic Corp. (Omnis Technology Corporation) | Omnis Data |
| BR1 file extension | Ghisler Software GmbH | Total Commander Cached Button Bar Icons |
| BR2 file extension | Ghisler Software GmbH | Total Commander Cached Button Bar Icons |
| BR3 file extension | DAZ Productions | Bryce 3D Scene Format |
| BR4 file extension | DAZ Productions | Bryce 4 Scene Format |
| BR5 file extension | DAZ Productions | Bryce 5 Scene Format |
| BR6 file extension | DAZ Productions | Bryce 6 Scene Format |
| BR7 file extension | DAZ Productions | Bryce 7 Scene Format |
| BRA file extension | Various Linux developers | Linux |
| BRAGG file extension | N/A | Bragg Profile |
| BRAIN file extension | TheBrain Technologies | PersonalBrain Mind Map Format |
| BRASD file extension | N/A | Mario Kart Mod |
| BRB file extension | DAZ 3D Inc. | Bryce Object Export |
| BRC file extension | DAZ 3D Inc. | Bryce 2 Scene |
| BRD file extension | CadSoft | EAGLE Circuit Board Format |
| BRE file extension | N/A | Breuckmann Scanner |
| BREFF file extension | Nintendo Co., Ltd. | Mario Kart Wii Animated Graphic |
| BREFT file extension | Nintendo Co., Ltd. | Mario Kart Wii Animated Graphic |
| BREP file extension | Open CASCADE | 3D Model |
| BREW file extension | N/A | Homebrew |
| BRF file extension | N/A | Braille Format |
| BRFNT file extension | Nintendo Co., Ltd. | Mario Kart Wii Font |
| BRG file extension | Bentley Systems | Bentley ProjectWise Configuration Format |
| BRH file extension | Sheshadrivasu Chandrasekharan | Baraha |
| BRI file extension | DAZ Productions | Bryce Plug-in Format |
| BRIDGECACHE file extension | Adobe Systems Incorporated | Adobe Bridge Cache |
| BRIDGECACHET file extension | Adobe Systems Incorporated | Adobe Bridge Cache |
| BRIDGELABELSANDRATINGS file extension | Adobe Systems Incorporated | Adobe Bridge |
| BRIDGESORT file extension | Adobe Systems Incorporated | Adobe Bridge Cabinet |
| BRIDGESUPPORT file extension | Apple, Inc. | Bridgesupport Mac OS X File Extension |
| BRK file extension | Dialogic | Brooktrout Fax Format |
| BRLCAD file extension | BRL-CAD Development Team and US Army | BRL-CAD 3D |
| BRLYT file extension | N/A | Nintendo Wii Texture Settings Format |
| BRM file extension | DAZ Productions | Bryce Plug-in Format |
| BRN file extension | BrainStorm Software | BrainStorm Data Format |
| BRO file extension | Broderbund | CreataCard Booklet/brochure Project Format |
| BROGUESAVE file extension | Seth Howard | Brogue Saved Game |
| BROWSER file extension | Microsoft | ASP.NET Browser Definition Format |
| BRP file extension | Onyx Computing, Inc. | Tree Professional Broadleaf Creator Image |
| BRPX file extension | Rick Meyers | E-sword Bible Reading Plan |
| BRRES file extension | N/A | Wii BRRES Resource Package |
| BRS file extension | Adobe Systems | Adobe RoboHelp Browse Sequence Format |
| BRSAR file extension | N/A | Wii BRSAR Audio Package |
| BRSTM file extension | N/A | Audio Format |
| BRT file extension | DAZ Productions | Bryce Textures Format |
| BRTEX file extension | N/A | Wii BRTEX Texture |
| BRU file extension | N/A | Brutus Restore |
| BRV file extension | BraveTech Inc. | BraveViewer Thumbnail Cache |
| BRW file extension | Calyx Software | Calyx Point Borrower Format |
| BRX file extension | QUALCOMM | BREW MP Application Resource Format |
| BRY2 file extension | DAZ 3D Inc. | Bryce 2 |
| BS file extension | N/A | Printfox/Pagefox Image Format |
| BS1 file extension | VirtualBus | VirtualBus Format |
| BS2 file extension | Parallax | BASIC Stamp 2 Code Format |
| BS4 file extension | BeamYourScreen | Mikogo Session Video Recording Format |
| BS7 file extension | Windows 7 Boot Updater | Windows 7 Boot Updater Boot Animation Format |
| BSA file extension | Bethesda Softworks | Bethesda Softworks Archive Format |
| BSAVE file extension | Microsoft Corporation | Quickbasic BLOAD/BSAVE Format |
| BSB file extension | Take-Two Interactive Software | BioShock Saved Game Format |
| BSC file extension | Microsoft | Microsoft Visual Studio Visual C++ Source Browser Information Format |
| BSCS file extension | AKS-Labs | Balanced Scorecard Designer |
| BSCT file extension | AKS-Labs | Balanced Scorecard Designer Strategy |
| BSD file extension | IEEE | BSDL Format |
| BSDF file extension | ZEMAX Development Corporation | ZEMAX Scattering Distribution Data |
| BSDIFF file extension | Red Hat, Inc. | Cygwin |
| BSDL file extension | IEEE | Boundary Scan Description Language Format |
| BSE file extension | School of Aquatic & Fishery Sciences, University of Washington | CRiSP Harvest |
| BSF file extension | N/A | AVC Blu-ray Video Format |
| BSH file extension | Patrick Niemeyer | BeanShell Script Format |
| BSI file extension | N/A | Microsoft SharePoint Server 2007 Temporary |
| BSK file extension | Nero | Nero SecurDisc Private Key Format |
| BSL file extension | bs.global organization | BSPlayer Configuration |
| BSM file extension | 2K Games | Bioshock Map |
| BSMX file extension | BeerSmith LLC | BeerSmith |
| BSMZ file extension | N/A | Compressed BSML |
| BSN file extension | Autodesk, Inc. | Autodesk TR-55 Detention Basin Storage Data |
| BSON file extension | 10gen | BSON Binary JSON |
| BSP file extension | id Software | Quake 2 Map Format |
| BSPR file extension | Electronic Arts, Inc. | Need For Speed SHIFT Track Map |
| BSPROJ file extension | Banned Story development team | Banned Story Project |
| BSQ file extension | Esri | ArcView Band Sequential Image |
| BSR file extension | N/A | Bacula Restore |
| BSS file extension | Capcom | Resident Evil Background Images Format |
| BST file extension | N/A | BiblioTex Format |
| BSV file extension | Bluespec, Inc. | Bluespec System Verilog |
| BSW file extension | Microsoft Corporation | Business Scorecard Manager Workspace |
| BSWX file extension | Microsoft Corporation | Microsoft Office PerformancePoint Server Database |
| BSX file extension | N/A | PBASIC Preprocessor Output |
| BSY file extension | Paul Rädle | VTrain Learning Cardfile |
| BSZ file extension | bs.global organization | BSplayer Compressed Skin |
| BT file extension | Ben Discoe | VTBuilder Binary Terrain Format |
| BT! file extension | BitSpirit | BitSpirit Incomplete Download Format |
| BT0 file extension | PG Music Inc. | Band-in-a-Box Temporary |
| BT1 file extension | West Mountain Radio | Battery Analyzer Test |
| BT2 file extension | Lars Sams | Batch Barcode Maker |
| BT3 file extension | MomSoft | Control Runner Button Configuration |
| BT5 file extension | ERP5 Community | ERP5 Business Template |
| BTAPP file extension | BitTorrent | UTorrent Application Format |
| BTD file extension | Biztree | Business-in-a-Box Document Format |
| BTF file extension | Bank of America | NationsBank Check Images |
| BTG file extension | Curtis L. Olson | FlightGear Scenery |
| BTH file extension | Jeppesen Marine, Inc. | Bathy Recorder Data |
| BTI file extension | Nintendo | Nintendo Texture Format |
| BTIF file extension | Bank of America | NationsBank Check Image Format |
| BTINSTALL file extension | BitTorrent | BitTorrent Installation Format |
| BTK file extension | Procedimientos-Uno, S.L. | CLwin Tekton Database |
| BTKEY file extension | BitTorrent, Inc. | BitTorrent License Key |
| BTL file extension | SolidWorks Corporation | SolidWorks Sheet Metal Bend Table |
| BTM file extension | Microsoft | Microsoft BizTalk Map Format |
| BTN file extension | Indigo Rose | AutoPlay Media Studio Button Format |
| BTO file extension | DAZ Productions | Bryce Tree Format |
| BTOA file extension | N/A | Binary-to-ASCII File Format |
| BTR file extension | Pervasive Software | Btrieve Database Format |
| BTREE file extension | Apple, Inc. | Apple Mac OS HFS+ B-tree |
| BTS file extension | Creative Technology Ltd. | Creative Digital Blaster Digital VCR |
| BTSEARCH file extension | BitTorrent | BitTorrent Search Engine Specification Format |
| BTSKIN file extension | BitTorrent, Inc. | µTorrent Skin |
| BTST file extension | Symantec Corporation | Norton SystemWorks Info |
| BTT file extension | ICQ LLC | ICQ Find Users |
| BTU file extension | Diablo Analytical, Inc. | Diablo BTU Calculator |
| BTW file extension | Seagull Scientific | BarTender Barcode Label Format |
| BTWSENDTO file extension | Microsoft Corporation | Microsoft Windows Bluetooth Related |
| BTX file extension | SmartWare Corporation | SmartWare Backup Text |
| BTY file extension | PopTop Software Inc. | Railroad Tycoon 3 Building |
| BU file extension | David Harris | Pegasus Mail Temporary |
| BUB file extension | N/A | Photobubble |
| BUC file extension | Adobe Systems Incorporated | Adobe Photoshop Elements Backup |
| BUD file extension | Microsoft | Binary Printer Description Format |
| BUF file extension | N/A | Buffer Format |
| BUFFEREDIMAGE file extension | Oracle Corporation | Java Class |
| BUGSENSE file extension | Bugsense Inc. | BugSense |
| BUILD file extension | SourceForge.net | NAnt Build Tool |
| BUILDALOT2SAVEDGAME file extension | Big Fish Games | Build-a-lot 2 Save Game |
| BUILDALOT3SAVEDGAME file extension | Big Fish Games | Build-a-lot 3 Saved Game |
| BUILDER file extension | N/A | Builder Script |
| BUILDPATH file extension | Eclipse | Eclipse XML Build Path Format |
| BUJ file extension | J. Rathlev, IEAP, Kiel University | Personal Backup Saved Task |
| BUL file extension | The NSR Physiome Project | Bullseye Data Format |
| BUM file extension | N/A | Poser Bump Files Image Format |
| BUN file extension | Roland | CakeWalk Audio Bundle Format |
| BUNDLE file extension | Apple | Mac OS X Application Extension |
| BUNDLEDMESH file extension | Electronic Arts, Inc. | Battlefield Bundled Mesh |
| BUP file extension | N/A | Backup Of DVD Info Format |
| BUR file extension | Fluffy Smoke Entertainment | BuRg3r Source Code Format |
| BURN file extension | N/A | Burn For Mac OS X Document |
| BURNOUTPARADISESAVE file extension | Criterion Games | Burnout Paradise Saved Profile |
| BURNTHEME file extension | SourceForge.net | Burn For Mac OS X Theme Document |
| BUS file extension | VirtualBus | VirtualBus Bus Route Settings Format |
| BV1 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV2 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV3 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV4 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV5 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV6 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV7 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV8 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BV9 file extension | Corel Corporation | Corel WordPerfect Overflow |
| BVC file extension | IBM | IBM Voice Type Languages Newuser |
| BVD file extension | Bitdefender | BitDefender Vault Format |
| BVH file extension | Biovision | Biovision Hierarchy Animation Format |
| BVI file extension | IBM | IBM Voice Type Languages Newuser |
| BVL file extension | Micrografx, Inc. | Micrografx Picture Publisher 8 Textures |
| BVP file extension | VodaHost | Bluevoda Website Builder Format |
| BVR file extension | Perspective Software | Blue Iris Video Format |
| BVS file extension | BVS Development Corporation | BVS Solitaire Collection |
| BVW file extension | SmartWare Corporation | SmartWare Backup Standard View |
| BVX file extension | Bravura Software, LLC | OptiTune Install Package |
| BVXD file extension | Bravura Software, LLC | OptiTune Manifest |
| BW file extension | N/A | Silicon Graphics Image |
| BW1 file extension | Byteworx | FMEA Database |
| BWA file extension | VSO-Software | BlindWrite BWA Builder Physical CD Characteristics Format |
| BWC file extension | Black Hills Software | BeadWizard Color Palette |
| BWD file extension | Codemasters | Colin McRae Rally 2 Car Description |
| BWE file extension | LionHead Studios | Black And White 2 Environment Data |
| BWF file extension | N/A | Broadcast Wave File Format |
| BWG file extension | Noromaa Solutions | BrainWave Generator Format |
| BWI file extension | N/A | BlindWrite CD/DVD Image Format |
| BWM file extension | Statistics Netherlands | Blaise |
| BWP file extension | Fluffy Smoke Entertainment | BuRg3r Web Page |
| BWS file extension | VSO-Software | BlindWrite Subchannel Data Format |
| BWT file extension | N/A | Blindwrite Control Format |
| BWU file extension | VSO-Software | Blindwrite CD Copier |
| BWW file extension | Doug Wickstrom | Bagpipe Music Writer Music Notation Format |
| BWZ file extension | Gilles Vollant | WinImage Batch Configuration |
| BX file extension | Opera Software ASA | Opera |
| BXB file extension | NetMedia, Inc. | BasicX Compiled Project Bytecode |
| BXI file extension | Statistics Netherlands | Blaise |
| BXL file extension | Accelerated Designs | Accelerated Designs PCB Library Format |
| BXM file extension | NetMedia, Inc. | BasicX-24 Basic Express Compiler Map |
| BXML file extension | N/A | Bean XML |
| BXP file extension | NetMedia, Inc. | BasicX-24 Basic Express Compiler Module List |
| BXRC file extension | The Bochs Project | Configuration |
| BXU file extension | Sony Corporation | PictureGear Studio |
| BXX file extension | Bitmanagement Software | BlaxxunContact Format |
| BXY file extension | N/A | NuFX Archive Within A Binary II Envelope |
| BY file extension | Cadence Design Systems, Inc. | PSpice |
| BYU file extension | BYU | Movie.BYU Geometry Format |
| BZ file extension | N/A | BZIP Compressed File Archive |
| BZ1 file extension | N/A | WinTOTAL Automatic Backup |
| BZ2 file extension | N/A | Bzip2 Compressed File Archive |
| BZA file extension | N/A | IZArc BGA Archive |
| BZABW file extension | AbiSource | AbiWord Bzip2 Compressed Document Format |
| BZIP file extension | N/A | Bzip Compressed Archive |
| BZIP2 file extension | Bzip | BZIP Compressed Archive Format |
| BZM file extension | Esri | Business Map |
| BZN file extension | Activision | Star Trek Armada Map |
| BZP2 file extension | Julian Seward | BZIP2 Archive |
| BZS file extension | Rocket Software, Inc. | BlueZone Script |
| BZW file extension | BZFlag.org | BZFlag Map Format |
| BZZ file extension | Link-Assistant.com | BuzzBundle Project |
Web Developer acting on his own, author of Internet solutions facilitating working with new technologies for less advanced users. Internet maniac.
