File types with extensions that start with the letter B

File Extention	File Type	Description
.b	Game	Grand Theft Auto 3 Saved Game File
.b	Developer	BASIC Source File
.b	Developer	BuRg3r Definition File
.b1	Compressed	B1 Compressed Archive
.b2a	Encoded	Btoa Encoded File
.b3d	3D Image	Blitz3D Entity Model File
.b4s	Audio	Winamp Playlist File
.b5i	Disk Image	BlindWrite 5 Disk Image
.b5t	Disk Image	BlindWrite 5 Disc Track Information File
.b64	Compressed	Base64 MIME-Encoded File
.b6i	Disk Image	BlindWrite 6 Disc Image
.b6t	Disk Image	BlindWrite 6 Track Information File
.ba	Compressed	Scifer External Header Archive
.ba_	Executable	Renamed BAT File
.bac	Backup	Backup File
.backup	Backup	Android Backup File
.backupdb	Backup	Time Machine Backup Folder
.bad	Text	Exchange Badmail File
.bafl	Data	BurnAware File List
.bak	Backup	Finale Backup File
.bak	Backup	ACT! Backup File
.bak	Backup	Firefox Bookmarks Backup
.bak	Backup	Backup File
.bakx	Backup	Finale Backup File
.bak~	Backup	AbiWord Auto-Saved Document
.band	Audio	GarageBand Project File
.bap	Audio	Blaze Audio Wave Information File
.bar	Game	Age of Mythology Data File
.bar	Game	Age of Empires 3 Data File
.bar	Data	Brew MP Binary Application Resource File
.bas	Developer	BASIC Source Code File
.baserproj	Data	DNA Baser Project File
.basex	Developer	BaseX Data File
.bash_history	System	Bash History File
.bash_profile	System	Bash Interactive Login Shell File
.bashrc	System	Bash Non-Interactive Login Shell File
.bat	Executable	DOS Batch File
.bau	Settings	Apache OpenOffice AutoText File
.bav	Plugin	AVG Anti-Virus The Bat! Plugin File
.bay	Camera Raw	Casio RAW Image
.bb	Developer	Blitz Source Code File
.bb3	Game	BlasterBall 3 Level File Support
.bbb	Backup	BlackBerry Mobile Phone Backup File
.bbc	Developer	BBC BASIC Data File
.bbcd	CAD	BobCAD-CAM Document
.bbl	Misc	BibTeX Generated Bibliography File
.bblm	Plugin	BBEdit Language Module
.bbproject	Developer	BBEdit Project File
.bbprojectd	Developer	BBEdit Project Document
.bbs	Text	Bulletin Board System Text
.bbz	Backup	BerryBuzz Backup File
.bc	Data	Adobe Bridge Cache File
.bc	Misc	BitComet Partially Downloaded File
.bc!	Misc	BitComet Incomplete File
.bcc	Data	Calendar Creator File
.bcd	System	Windows Boot Configuration Data File
.bcd	CAD	RealView Debugger Board Chip Definition File
.bcf	Page Layout	Business Card Designer Pro File
.bci	Data	Belarc Advisor Report File
.bck	Backup	VMX Backup File
.bckp	Backup	Ad-Aware Quarantined File
.bcl	Data	Illumina Base Call File
.bcm	Backup	Microsoft Works Communications Script Backup
.bcm	Data	Adobe Bridge Cache File
.bcm	Data	Business Contact Manager File
.bcmx	Settings	Business Contact Manager Customization
.bcp	Settings	BlackMagic Custom Palette
.bcp	Settings	Batch Compiler Preset File
.bcp	Developer	Borland C++ Makefile
.bcp	Page Layout	Business Card Designer Plus File
.bcs	Settings	Boland Calibration Settings File
.bcs	Audio	Sonic Foundry Batch Converter Script
.bcs	Settings	Batch Compiler Specification File
.bct	Data	Adobe Bridge Thumbnail Cache File
.bdae	Game	Gameloft Game Data File
.bdb	Backup	Microsoft Works Database Backup File
.bdc	CAD	West Point Bridge Designer Design File
.bdc	Data	Babylon Dictionary File
.bdd	Audio	CARA Sound Radiation Data File
.bdf	Font	Glyph Bitmap Distribution Format
.bdf	Data	Binary Data File
.bdf	Disk Image	MIDAS BDF Disk Image File
.bdf	Data	Bulk Data Input File
.bdic	Data	Chrome Dictionary File
.bdl	CAD	CoCreate Bundle File
.bdm	Video	AVHCD Information File
.bdmv	Video	Blu-ray Disc Movie Information File
.bdp	Text	Exchange Diagnostic Message
.bdr	Misc	Publisher Borders File
.bdr	Text	Exchange Non-Delivery Report Body File
.bdsproj	Developer	Borland Developer Studio Project
.bdt2	Video	BEEDOCS Timeline 3D 2 Document
.bdt3	Video	BEEDOCS Timeline 3D 3 Document
.beam	Executable	Compiled Erlang File
.bean	Text	Bean Rich Text Document
.bed	Data	UCSC BED Annotation Track File
.bejeweled2deluxesavedgame	Game	Bejeweled 2 Deluxe Saved Game
.bet	Developer	BETA Source File
.bf	Game	CryoBF Game Data File
.bfa	Encoded	Blowfish Encrypted File
.bfc	Misc	Windows Briefcase File
.bff	Backup	Backup File Format
.bfg	Game	Big Fish Games Application File
.bfm	Game	Terminal Reality Model File
.bfs	Game	FlatOut Game Data File
.bfx	Data	Bitware Fax Document
.bgi	Settings	BgInfo Configuration File
.bgl	Game	Flight Simulator Scenery File
.bgl	Data	Babylon Glossary File
.bgt	Data	Graphics Accounts Data File
.bgz	Game	Blood Frontier Map File
.bh	Compressed	BlakHole Archive
.bho	Data	Behold Organize File
.bhx	Encoded	BinHex Encoded File
.bib	Text	BibTeX Bibliography Database
.bib	Text	Bibliography Document
.bic	Game	Neverwinter Nights Character File
.bic	Game	Civilization 3 Scenario File
.bidule	Audio	Bidule Layout File
.bif	Disk Image	Boot Information File
.bif	Backup	Get Backup Project File
.bif	Game	BioWare Infinity Engine File
.bifx	Backup	Get Backup Project
.big	Game	Electronic Arts Game Data File
.bik	Game	Video Game Movie File
.bik	Video	Bink Video File
.bil	GIS	ESRI BIL File
.bim	Data	Bytessence InstallMaker Document
.bin	Game	PCSX PlayStation BIOS Image
.bin	Data	Generic Binary File
.bin	Game	Nintendo DS Binary File
.bin	Disk Image	Binary Disc Image
.bin	Settings	BlackBerry IT Policy File
.bin	System	Router Firmware File
.bin	Game	Atari 2600 Game ROM
.bin	Encoded	Macbinary Encoded File
.bin	Game	Sega Genesis Game ROM
.bin	Executable	Generic Binary Executable File
.bin	Video	Binary Video File
.bin	Executable	Unix Executable File
.bio	System	BIOS File
.bio	3D Image	Mudbox Bio 3D File
.bionix	Data	BioniX Wallpaper Playlist File
.bip	3D Image	Character Studio Biped File
.biq	Game	Civilization 3 Scenario File
.bit	CAD	Xilinx Bitstream File
.bitpim	Settings	BitPim Configuration File
.bix	Game	Civilization 3 Scenario File
.bix	Video	Kodicom Video File
.biz	Page Layout	Broderbund Business Card File
.bjo	Data	TabRite Tablature File
.bk	Data	FrameMaker Book File
.bk1	Backup	ERwin Backup File
.bk1	System	Windows Indexing Service File
.bk1	Backup	Autodesk Backup File
.bk2	System	Windows Indexing Service Data File
.bkc	Backup	Backup4all Backup Catalog
.bkf	Backup	Windows Backup Utility File
.bkk	eBook	BookBuddi eBook File
.bkmk	Misc	Yummy FTP Bookmark File
.bkp	Backup	Zapback Backup File
.bkp	Backup	Backup File
.bks	Settings	NTBackup Settings File
.bks	Spreadsheet	Microsoft Works Spreadsheet Backup File
.bkup	Backup	Backup File
.bkz	Plugin	BaKoMa TeX Installation Module
.bkz	Backup	FileFort Backup File
.blackhawkstriker2	Game	Blackhawk Striker 2 Saved Game
.blasterball3savedgame	Game	BlasterBall 3 Saved Game
.blb	Game	Dreamworks Resource File
.blb	Data	Blob Data File
.bld	Data	Envisioneer Building Project File
.blend	3D Image	Blender 3D Data File
.blend1	Backup	Blender Document Backup File
.blend2	Backup	Blender Document Backup 2 File
.blf	System	CLFS Base Log File
.blf	Misc	MasterWorks Working File
.blg	Data	BibTeX Log File
.blg	Data	Windows Binary Performance Log File
.bli	Misc	Thomson Speedtouch Firmware File
.blk	CAD	AutoCAD Block Template File
.blkrt	Raster Image	Block Artist Image File
.bln	Data	Golden Software Blanking File
.blob	Settings	Valve Steam Archive
.blockplt	Data	LEGO MINDSTORMS NXT Block Palette File
.blogthis	Data	Windows Live Writer Data File
.blp	Game	Speedy Eggbert Game Data File
.blp	Game	Blizzard Texture File
.bls	Game	Blockland Saved Game File
.blt	Settings	AIM Buddy List
.blu	Plugin	FileMaker Pro Runtime Extension
.bluej	Developer	BlueJ Package File
.blw	Settings	Adobe Photoshop Black and White Presets File
.blz	Game	N-Gage Mobile Video Game File
.blz	Raster Image	Compressed Bitmap Image
.bm2	Data	Boardmaker Interactive Board File
.bm2	Raster Image	Subspace Bitmap File
.bm3	Backup	Sony Ericsson Backup File
.bmc	Misc	Embroidery Image File
.bmc	Raster Image	Bitmap Cache File
.bmc	Video	Bolide Movie Creator Project File
.bmd	Game	GameCube 3D Model File
.bmd	Game	MU Online Game Data File
.bme	Game	BeatMania 7-Key Song File
.bmf	Raster Image	Binary Material File
.bmf	CAD	FloorPlan File
.bmg	Game	Nintendo DS On-Screen Text File
.bmi	Plugin	3ds Max Plug-in
.bmk	Backup	BillMinder Backup File
.bmk	Video	PowerDVD MovieMark File
.bmk	System	Help Bookmarks
.bmk	Misc	Nokia Device Bookmark File
.bml	Web	Bean Markup Language File
.bmp	Raster Image	Bitmap Image File
.bms	Game	BeatMania Song File
.bms	Data	BIOWRAP Multi-Layer Security File
.bmx	Raster Image	Siemens Mobile Animations File
.bmz	Game	Portal Bonus Map Zip File
.bmz	Raster Image	Compressed Bitmap Image
.bna	Text	Barna Word Processor Document
.bnd	Misc	DB2 CLI Bind File
.bndl	Compressed	Game Data Bundle File
.bng	Game	The Bingo Maker Card File
.bnk	Data	Spotify Playlist File
.bnk	Audio	Adlib Instrument Bank
.bnk	Game	Test Drive Unlimited Data Package
.bnp	Video	Sony Camcorder Video Data File
.bns	Game	Portal Bonus Map Script
.bnz	Game	The Bingo Maker Card Template File
.boc	Text	EasyWord Big Document
.bok	Data	TestGen Testbank File
.bok	Web	ProStores Dynamic Web Page
.bom	System	Mac OS X Bill of Materials File
.bonk	Audio	Bonk Audio File
.boo	Compressed	Booasm Compressed Archive
.book	Data	iBooks Author Document
.book	Data	Budget In Brief Book File
.book	Page Layout	FrameMaker Book File
.booktemplate	Data	iBooks Author Document Template
.bookwormdeluxesavedgame	Game	Bookworm Deluxe Saved Game
.boot	Settings	InstallShield Boot File
.bootskin	Misc	Stardock Bootskin File
.box	Audio	CARA Loudspeaker Design File
.box	Misc	Microsoft Store Download File
.box	Video	Kodicom Video
.box	Data	E-mail Mailbox
.bp2	Misc	AutoCAD Batch Plot File
.bp3	Misc	AutoCAD Batch Plot File
.bpa	Backup	StorageSync Backup Archive
.bpb	Backup	PowerDesigner Business Process Backup File
.bpd	Data	Binary Printer Description File
.bpd	Data	Business Plan Pro Document
.bpdx	Data	Business Plan Pro Document
.bpdx	Misc	Acrobat Batch PDX File
.bpf	Page Layout	Baan ERP Document
.bpg	Developer	Borland Project Group
.bpk	Encoded	Nero SecurDisc Public Key File
.bpl	Developer	Borland Package Library
.bpl	Misc	AutoCAD Batch Plot File
.bpm	Backup	PowerDesigner Business Process Model
.bpm	CAD	Bizagi Process Modeler
.bpm	Data	Trados AutoSuggest Dictionary File
.bpmc	CAD	Bizagi Process Modeler Collaboration
.bpn	Backup	ArchiCAD Project Backup File
.bpnueb	eBook	PNU eBook File
.bpr	Developer	Borland C++Builder Project File
.bps	Backup	Works Document Backup
.bps	Misc	BPS Virus File
.bpw	GIS	Bitmap World File
.bpw	Encoded	Bitser Password File
.bpz	CAD	Easy Blue Print Symbol Library
.bqy	Misc	Brio Query File
.br3	3D Image	Bryce 3 Scene File
.br4	3D Image	Bryce 4 Scene File
.br5	3D Image	Bryce 5 Scene File
.br6	3D Image	Bryce 6 Scene File
.br7	3D Image	Bryce 7 Scene File
.brain	Data	PersonalBrain Mind Map File
.brd	Data	EAGLE Circuit Board File
.brd	CAD	Cadence Allegro PCB Design File
.brd	CAD	KiCad PCB Design File
.brf	Data	Braille Ready Format File
.brg	3D Image	Age of Mythology Model File
.brg	Settings	ProjectWise User Settings File
.bri	Plugin	Bryce Plug-in File
.bridgecache	Data	Adobe Bridge Cache Export File
.brk	Raster Image	Brooktrout Fax Document
.brlyt	Game	Wii Textures and Material Lists File
.brm	Plugin	Bryce Plug-in File
.brn	Game	Gabriel Knight Barn File
.brn	Data	BrainStorm Data File
.brn	Raster Image	Cube Graphics File
.bro	Page Layout	CreataCard Brochure Project
.bro	3D Image	Broadleaf Tree Model
.bro	Page Layout	Design & Print Page Design File
.bro	Plugin	Bryce Plug-in
.browser	Web	ASP.NET Browser Definition File
.brres	Game	Wii BRRES Resource Package
.brs	Data	RoboHelp Browse Sequence File
.brsar	Game	Wii BRSAR Audio Package
.brstm	Audio	BRSTM Audio Stream File
.brt	Raster Image	Bryce Textures File
.brw	Data	Calyx Point Borrower File
.brx	Developer	BREW Application Resource File
.brx	Text	Beam Report Document
.bs1	Game	VirtualBus Vehicle Configuration File
.bs2	Developer	BASIC Stamp 2 Code File
.bs4	Video	Mikogo Session Video Recording
.bs7	Settings	Windows 7 Boot Updater Skin
.bsa	Game	Bethesda Softworks Archive
.bsb	Game	BioShock Saved Game File
.bsc	Developer	Visual Studio Source Browser Information File
.bsd	Data	BSDL File
.bsdl	Data	Boundary Scan Description Language File
.bsf	Video	Blu-ray AVC Video File
.bsh	Developer	BeanShell Script
.bsk	Encoded	Nero SecurDisc Private Key File
.bsk	3D Image	Bryce Skies File
.bsp	Game	Quake Engine Game Map File
.bss	Raster Image	Resident Evil Background Images File
.bst	Misc	BibTeX Style Document
.bt	GIS	Binary Terrain File
.bt!	Misc	BitSpirit Incomplete Download File
.btapp	Web	uTorrent App
.btd	Text	Business-in-a-Box Document
.btf	Data	NationsBank Check Images
.bti	Raster Image	Nintendo Texture File
.btif	Data	NationsBank Check Image File
.btinstall	Data	uTorrent Installer File
.btm	Executable	4DOS Batch File
.btm	Data	BizTalk Map File
.btn	Developer	AutoPlay Media Studio Button File
.bto	3D Image	Bryce Tree File
.btoa	Encoded	Binary-to-ASCII Encoded File
.btr	Database	Btrieve Database File
.btsearch	Settings	BitTorrent Search Engine File
.btw	Page Layout	BarTender Label
.bu	Video	Samsung CCTV Video File
.bud	System	Binary Printer Description File
.buf	Misc	Buffer File
.buildpath	Developer	Eclipse Build Path File
.bun	Audio	Cakewalk Bundle File
.bundle	Plugin	Mac OS X Application Bundle
.bup	Backup	Backup File
.bup	Backup	DVD IFO Backup File
.bup	Misc	McAfee Quarantined File
.bur	Developer	BuRg3r Source Code File
.bus	Game	VirtualBus Board Parameters File
.bus	Game	OMSI Bus Configuration File
.bvd	Encoded	Bitdefender Vault File
.bvh	3D Image	Biovision Hierarchy Animation File
.bvp	Data	VodaHost BlueVoda Project File
.bvr	Video	Blue Iris Video
.bwa	Game	Bookworm Adventures Player File
.bwa	Disk Image	BlindWrite Disk Information File
.bwf	Audio	Broadcast Wave File
.bwg	Audio	BrainWave Generator Audio File
.bwi	Disk Image	BlindWrite CD/DVD Disc Image
.bwp	Web	BuRg3r Web Page
.bws	Disk Image	BlindWrite Sub Code File
.bwt	Disk Image	BlindWrite 4 Disk Image
.bww	Audio	Bagpipe Player File
.bwz	Disk Image	WinImage Batch Configuration File
.bxl	CAD	Accelerated Designs PCB Library File
.bxx	Settings	BS Contact Parameter File
.bytes	Developer	Binary Text Asset Data File
.byu	Video	Brigham Young University Movie File
.bz	Compressed	Bzip Compressed File
.bz2	Compressed	Bzip2 Compressed File
.bza	Compressed	IZArc BGA Archive
.bzabw	Text	Compressed AbiWord Document
.bzip	Compressed	Bzip Compressed Archive
.bzip2	Compressed	Bzip2 Compressed Archive
.bzw	Game	BZFlag World File