File extension	The full name of the file	Popularity
File extension C	C/C++ Source Code File
File extension C00	WinAce Split Archive File
File extension C01	WinAce Split Archive Part 1 File
File extension C02	WinAce Split Archive Part 1 File
File extension C10	WinAce Split Archive Part 10
File extension C2D	WinOnCD Disc Image
File extension C2R	Windows Media Center Click-To-Record File
File extension C2U	Texas Instruments CBL 2 OS File
File extension C32	Syslinux COM32 Module
File extension C3D	Coordinate 3D File
File extension C3Z	OpenQwaq 3D Model File
File extension C4	JEDMICS Image File
File extension C4D	Cinema 4D Model File
File extension C4K	Clonk Key File
File extension C4P	CrossOver Software Installer File
File extension CA	Initial Telnet Cache
File extension CAA	CleanApp Archive
File extension CAB	Windows Cabinet File
File extension CACHE	Cache File
File extension CACTION	Automator Converter Action
File extension CAD	BobCAD-CAM File
File extension CADC	Corpatla Data Container File
File extension CAF	Core Audio File
File extension CAFF	Core Audio File
File extension CAG	ClipArt Gallery Package
File extension CAL	3ds Max Pose Adjustment File
File extension CALB	Coolect Album File
File extension CALIBRE	Calibre Device Data File
File extension CALS	CALS Raster Graphic File
File extension CAM	Gerber CAM Job File
File extension CAMM	Espresso Mind Map Document
File extension CAMP	WCS CAMP
File extension CAMPROJ	Camtasia Studio Project
File extension CAMREC	Camtasia Studio Screen Recording
File extension CAMV	Camtasia Video File
File extension CAN	Canon Navigator Fax Document
File extension CAP	Packet Capture File
File extension CAPROJ	Construct Project File
File extension CAPX	Construct Compressed Project File
File extension CAR	Car Explorer Data File
File extension CARC	Nintendo DS Compressed Archive File
File extension CAS	Autodesk AutoCAD license file
File extension CASE	SlipCover Case Template
File extension CAT	Microsoft Security Catalog file
File extension CATPART	CATIA V5 Part File
File extension CATPRODUCT	CATIA V5 Assembly File
File extension CAV	Comodo Virus Definitions File
File extension CAWR	Espresso workreport Document
File extension CB7	Comic Book 7-Zip Archive
File extension CBA	Comic Book ACE Archive
File extension CBC	Comic Book Collection
File extension CBDS	Comic Book DS File
File extension CBF	Calendar Builder File
File extension CBG	ChessBase Game Moves File
File extension CBH	ChessBase Database Header File
File extension CBK	Backup Configuration File
File extension CBL	COBOL Source Code File
File extension CBP	Code::Blocks Project File
File extension CBR	Comic Book Archive file or ComicBook Reader file
File extension CBS	Comodo Backup Script
File extension CBT	CDisplay TAR Comic book file
File extension CBU	Comodo Backup File
File extension CBV	ChessBase Database File
File extension CBZ	Comic Book Archive file or ComicBook Reader file
File extension CC	C++ Source Code File
File extension CCA	Multimedia Fusion File
File extension CCD	CloneCD Disc Image
File extension CCF	CryptLoad Container File
File extension CCGAME	XNA Creators Club Game Package
File extension CCH	Photomodeler photochip thumbnail file
File extension CCIP	Curse Client Install Package
File extension CCN	Multimedia Fusion development file
File extension CCP	CloneCD profiles file
File extension CCR	ASTM Continuity of Care Record
File extension CCS	TrialDirector clip script file
File extension CCSCC	ClearCase Source Control Info File
File extension CCT	Director Protected Cast Resource
File extension CCX	Click & Create Extension
File extension CD	Visual Studio Class Diagram
File extension CDA	CD Audio track
File extension CDB	Symbian Phonebook Database
File extension CDC	AutoCAD DesignCenter Preview Cache File
File extension CDD	ConceptDraw PRO Document
File extension CDDA	CD Digital Audio File
File extension CDDX	Circuit Diagram Document
File extension CDF	Computable Document Format File
File extension CDF-MS	ClickOnce Compiled Manifest File
File extension CDG	DART Karaoke Studio lyrics file
File extension CDI	DiscJuggler Disc Image
File extension CDL	CADKEY Wireframe Design File
File extension CDLX	Audition CD Layout File
File extension CDM	NTI CD-Maker Image
File extension CDMM	ConceptDraw MINDMAP Document
File extension CDMP	WCS Device Model Profile
File extension CDMT	ConceptDraw MINDMAP Template
File extension CDMTZ	Compressed ConceptDraw MINDMAP Template
File extension CDMZ	Compressed ConceptDraw MINDMAP Document
File extension CDO	Crescendo music score file
File extension CDP	Trainz Simulator Content Dispatcher Pack
File extension CDP2	Trainz Classics Content Dispatcher Pack 2
File extension CDPX	ConceptDraw PROJECT XML File
File extension CDPZ	ConceptDraw PROJECT Document
File extension CDR	CorelDRAW Image File
File extension CDT	CorelDRAW Image Template
File extension CDW	KOMPAS Document
File extension CDX	CorelDRAW compressed drawing file
File extension CDXML	ChemDraw XML File
File extension CDZ	ROM With a View project file
File extension CE	ComputerEyes Image
File extension CEB	Apabi eBook File
File extension CED	JVC Camera Video Data File
File extension CEDPRJ	Ashampoo CoverEditor Project
File extension CEF	CenturionMail Encrypted Package
File extension CEL	Affymetrix Probe Results File
File extension CELTX	Celtx Project File
File extension CELX	Celestia Script
File extension CEM	Empire Earth game file
File extension CER	Internet Security Certificate
File extension CEX	SolidWorks Enterprise PDM Vault Export File
File extension CF	Sendmail Configuration File
File extension CF2	Common File Format File
File extension CFA	Adobe Conformed Audio File
File extension CFC	ColdFusion Component File
File extension CFF	ColorImpact color formula file
File extension CFG	Configuration File
File extension CFGE	Jewel Quest Configuration File
File extension CFL	IMVU Product File
File extension CFM	ColdFusion Markup File
File extension CFML	ColdFusion Markup Language File
File extension CFR	Cross Fire Replay File
File extension CFS	INMOS configuration file
File extension CFXR	Cocoa Sfxr File
File extension CG	Cg Program
File extension CG3	Cabri 3D Document
File extension CGA	Ventura Publisher CGA display font
File extension CGF	Crytek Geometry Format File
File extension CGFX	CgFX Shader File
File extension CGI	Common Gateway Interface Script
File extension CGM	Computer Graphics Metafile
File extension CGP	PixelCryptor Encrypted File
File extension CGR	CATIA Graphical Representation File
File extension CGRP	Pro Tools Clip Group File
File extension CGZ	Linux Drivers Archive
File extension CH3	Harvard Graphics DOS Chart File
File extension CHA	IRC Chat Configuration File
File extension CHAM	Compiled HAM File
File extension CHARSET	Character Set
File extension CHART	Feedback Chart File
File extension CHAT	IRC Chat Configuration File
File extension CHC	HCFR Colorimeter Data File
File extension CHD	MAME Hard Disk Image
File extension CHEF	Chef Source Code File
File extension CHESSTITANSSAVE-MS	Microsoft Chess Titans Saved Game
File extension CHG	Quicken Online data file
File extension CHK	ScanDisk file fragment
File extension CHL	Microsoft Internet Explorer channel information file
File extension CHM	Compiled HTML Help File
File extension CHML	Chameleon Encrypted Database File
File extension CHN	Ethnograph Data
File extension CHORD	Song Chords File
File extension CHR	3ds Max Characters File
File extension CHRPARAMS	CryENGINE Character Parameters File
File extension CHS	Windows Chinese Noise-Word List File
File extension CHT	SNES Cheat File
File extension CHUNK001	File Splitter Split Archive Part 1
File extension CHV	ChView Interactive Star Map File
File extension CHW	Compiled Help Index File
File extension CHX	AutoCAD Standards Check File
File extension CI	CitectSCADA file
File extension CIDB	Apple iTunes CD information file
File extension CIF	Easy CD Creator Disk Image
File extension CIL	Clip Gallery Packaged File
File extension CIMG	CImg Image File
File extension CIN	Kodak Cineon Bitmap File
File extension CINE	Phantom Digital Video File
File extension CIP	CryptoBuddy encrypted file
File extension CIRCUIT	KTechlab Circuit Design File
File extension CIT	Intergraph Bitmap Image File
File extension CIV5SAVE	Civilization 5 Saved Gae
File extension CKB	Cricket Audio Bank File
File extension CKBX	Cricket Audio XML Bank Description File
File extension CKD	CADKEY design file
File extension CKF	Casio Keyboard File
File extension CKP	Ingres Database Checkpoint data
File extension CKT	CircuitMaker File
File extension CL	Cursor Library
File extension CL2	HY-TEK Meet Results File
File extension CL2ARC	Comic Life 2 Document Archive
File extension CL2DOC	Comic Life 2 Document
File extension CL2LYT	Comic Life 2 Layout File
File extension CL2TPL	Comic Life 2 Template
File extension CL4	Easy CD Creator 4 Project File
File extension CL5	Easy CD Creator 5 Saved Project
File extension CLARIFY	Clarify Document
File extension CLASS	Java Class File
File extension CLASSLIST	SMART Notebook Class List File
File extension CLB	Super NoteTab ClipBook template file
File extension CLD	Canon CD Label Template
File extension CLEO	CLEO Grand Theft Auto Mod File
File extension CLG	QIP list of ignored contacts file
File extension CLIPS	Coda Clips File
File extension CLIX	CLIX Command File
File extension CLK	Corel R.A.V.E Project File
File extension CLKK	Clicker Keyboard
File extension CLKT	Clicker Template
File extension CLKW	Clicker Word Bank
File extension CLKX	Clicker Grid Set
File extension CLM	MagicJack Call Log File
File extension CLP	CrazyTalk Clip File
File extension CLPI	Blu-ray Clip Information File
File extension CLR	Flash Color Set
File extension CLS	LaTeX Document Class File
File extension CLT	Clarity Legal Transcript File
File extension CLW	Visual C++ ClassWizard File
File extension CLX	Standard Dictionary File
File extension CM	CLEO Custom Mission
File extension CM10	CaseMap case file
File extension CM2	Poser Camera Set File
File extension CMA	TM1 Exported Cube File
File extension CMAP	CmapTools Concept Map File
File extension CMBL	Logger Pro Data File
File extension CMD	Windows Command File
File extension CME	Crazy Machines level file
File extension CMF	Creative Labs FM-synthesis music file
File extension CML	Chemical Markup Language File
File extension CMM	Corel Multimedia Manager Album
File extension CMMP	Camtasia MenuMaker Project
File extension CMMTHEME	CleanMyMac Theme File
File extension CMMTPL	Camtasia MenuMaker Template
File extension CMOD	Celestia Model
File extension CMP	PKWare Compression Library archive file
File extension CMPROJ	Camtasia Project File
File extension CMREC	Camtasia Recording
File extension CMS	CaseMap case script file
File extension CMX	Corel Metafile Exchange Image File
File extension CMZ	Compressed Poser Camera Set File
File extension CN1	CNR Modem Initialization Data File
File extension CNA	Catena Project File
File extension CNC	PartMaster CNC File
File extension CND	Melco Condensed Embroidery File
File extension CNDX	Avery DesignPro for Mac Label File
File extension CNF	MySQL Configuration File
File extension CNG	CryptoNG encrypted file
File extension CNM	NoteMap outline file
File extension CNS	Windows 2000 Client Connection Manager Export file
File extension CNT	Help Contents File
File extension CNV	Canvas 6-8 Drawing File
File extension COB	COBOL Source Code File
File extension COD	Compiled Source Code
File extension CODAPLUGIN	Coda Plug-in
File extension CODASITE	Coda Site File
File extension COF	AutoDesk data file
File extension COFFEE	CoffeeScript JavaScript File
File extension COL	Capture One Session File
File extension COLLECTION	Adobe Bridge Collection File
File extension COLORPICKER	Color Picker Plugin
File extension COLZ	Adobe Collage File
File extension COM	DOS Command File
File extension COMFYCAKESSAVE-MS	Comfy Cakes Saved Game
File extension COMICDOC	Comic Life Document
File extension COMMAND	Terminal Command File
File extension COMPONENT	Mac OS X System Component
File extension COMPOSITEFONT	Windows Composite Font File
File extension COMPRESSED	WordCompress Compacted Web File
File extension CON	Corel WordPerfect concordance file
File extension CONF	Configuration information file
File extension CONFIG	Configuration File
File extension CONFIGPROFILE	Apple Configuration Profile
File extension CONFORM	Conformalizer Change List File
File extension CONTACT	Windows Contact File
File extension CONTOUR	Contour Screenplay File
File extension CONTROLS	OpenBVE Keyboard Shortcuts File
File extension COPRESET	Capture One Preset File
File extension COPY	Sony Ericsson Protected Content File
File extension COR	CorelDRAW Drawing
File extension COS	Capture One Settings File
File extension COS2	Pinnacle Studio Cache File
File extension COSTYLE	Capture One Style File
File extension COV	Fax Cover Page File
File extension COX	Click & Create Extension
File extension CP	Xcode C++ Source File
File extension CP3	Grand Prix 3 Cockpit Shape File
File extension CP9	ChoicePoint Encrypted File
File extension CPA	Adobe Premiere conformed audio file
File extension CPB	Comicino Studio Project File
File extension CPBITMAP	iOS Wallpaper Image
File extension CPC	CPC Compressed Image File
File extension CPD	CorelDRAW Corel PrintOffice drawing file
File extension CPE	Fax Cover Page File
File extension CPF	Cognos Project File
File extension CPG	Manga Studio Page File
File extension CPGZ	Compressed CPIO Archive
File extension CPH	Corel Print House File
File extension CPI	AVCHD Video Clip Information File
File extension CPIO	Unix CPIO Archive
File extension CPK	DTM Test Log File
File extension CPL	Windows Control Panel Item
File extension CPMZ	Miradi/ConPro Project File
File extension CPN	Age of Mythology Campaign File
File extension CPP	C++ Source Code File
File extension CPQ	Compaq OEM Disc Configuration File
File extension CPR	Cubase Project
File extension CPS	Corel Photo House File
File extension CPT	Corel Photo-Paint Document
File extension CPTL	Adobe Captivate Project Template File
File extension CPTX	Adobe Captivate Project File
File extension CPX	Oracle ADF Binding Context File
File extension CPY	3ds Max Copy Track File
File extension CR2	Canon Raw Image File
File extension CRAFT	KSP Spacecraft File
File extension CRASH	Mac OS X Crash Log File
File extension CRASHED	AbiWord Crash-Saved Document
File extension CRC	Total Commander Checksum File
File extension CRD	Windows CardSpace File
File extension CRDOWNLOAD	Chrome Partially Downloaded File
File extension CRDS	Windows CardSpace Backup File
File extension CREV	Adobe Captivate Commentable SWF File
File extension CRF	Enhanced Dark Engine game archive file
File extension CRL	Certificate Revocation List File
File extension CRS	Corel WordPerfect conversion resource file
File extension CRT	Security Certificate
File extension CRTR	MultiAd Creator Pro Document
File extension CRTX	Office 2007 Chart Template File
File extension CRV	CorelDRAW Corel PHOTO-PAINT 10 custom gradients file
File extension CRW	Canon Raw CIFF Image File
File extension CRWL	Windows Crawl File
File extension CRX	Chrome Extension
File extension CRY	CryENGINE Map File
File extension CRYPTED	WinOptimizer Encrypted File
File extension CRYPTRA	Cryptra Encrypted File
File extension CRYSISJMSF	Crysis Saved Game
File extension CRYSISPSF	Crysis Warhead Saved Game
File extension CRZ	Compressed Poser Character Rigging File
File extension CS	Visual C# Source Code File
File extension CSA	PNA Code Calset File
File extension CSAPLAN	SPSS Analysis Plan File
File extension CSD	Compact Shared Document
File extension CSF	Content Sealed Format
File extension CSH	Photoshop Custom Shapes File
File extension CSHTML	ASP.NET Razor Web Page
File extension CSI	ContentServ Include File
File extension CSKIN	CD Art Display Skin File
File extension CSL	CineStyle Color Lookup File
File extension CSM	Character Studio Marker File
File extension CSN	Adobe Code Snippet Document
File extension CSO	CISO compressed ISO file
File extension CSP	CorelDRAW service bureau profiler file
File extension CSPLAN	SPSS Sampling Plan File
File extension CSPROJ	Visual Studio C# Project
File extension CSR	Certificate Signing Request File
File extension CSS	Cascading Style Sheet
File extension CST	Manga Studio Story File
File extension CSV	Comma Separated Values File
File extension CSX	Visual C# Script
File extension CSY	Canvas Symbol File
File extension CT	IRIS CT image file
File extension CTB	AutoCAD Color-Based Plot Style File
File extension CTBODYFITTING	CrazyTalk Animator Actor Fitting File
File extension CTF	AVG Update Control File
File extension CTG	BMC Software PATROL file
File extension CTL	Visual Basic UserControl Object File
File extension CTM	CrazyTalk Model File
File extension CTP	CakePHP Template
File extension CTPROJECT	CrazyTalk Animator Project File
File extension CTS	CrazyTalk Script File
File extension CTT	Messenger Contact List
File extension CTV	Citavi Project
File extension CTV3	Citavi 3 Project File
File extension CTX	Valve ICE Encoded Script
File extension CTXT	BlueJ Context File
File extension CTY	SimCity City File
File extension CU	CUDA Source Code File
File extension CUB	Analysis Services Cube File
File extension CUE	Cue Sheet File
File extension CUI	Autodesk Custom Workspace File
File extension CUIX	AutoCAD Custom User Interface File
File extension CUL	Windows Cursor Library
File extension CUR	Windows Cursor
File extension CURSORFX	CursorFX Theme File
File extension CURXPTHEME	CursorXP Theme File
File extension CUS	AutoCAD Custom Dictionary File
File extension CUT	Dr. Halo Bitmap Image File
File extension CV5	Canvas 5 Drawing File
File extension CVA	HP Systems Software Manager Information File
File extension CVC	cVideo
File extension CVD	ClamAV Virus Definitions File
File extension CVF	CPU-Z Validation File
File extension CVG	Calamus Vector Graphic File
File extension CVI	Canvas Image File
File extension CVN	CineVision Encoding Session
File extension CVR	Microsoft Crash Report File
File extension CVS	Canvas 3 Drawing File
File extension CVT	Canvas External Tool File
File extension CVW	CaseView Document
File extension CVX	Canvas Drawing File
File extension CW	CardWorks Template
File extension CWB	Cakewalk Bundle
File extension CWF	CorelDRAW Workspace File
File extension CWK	ClarisWorks Document
File extension CWP	Cakewalk SONAR Project
File extension CWS	Claris Works Template
File extension CWT	ClarisWorks Texture File
File extension CWW	Crossword Weaver Puzzle File
File extension CWZ	Circuit Wizard File
File extension CX3	CMS Recorded Video File
File extension CXD	SimplePCI Data Document
File extension CXF	Picasa Collage File
File extension CXP	CX-Programmer Project File
File extension CXT	Director Protected Cast File
File extension CXX	C++ Source Code File
File extension CYBERDUCKLICENSE	Cyberduck Donation Key
File extension CYBERDUCKPROFILE	Cyberduck Connection Profile
File extension CYI	Clustify Input File
File extension CYO	Clustify Output File
File extension CYP	Home Designer Pro Project File
File extension CYS	Cytoscape Session File
File extension CYW	Rbot.CYW Worm File
File extension CZD	CAD Zone Drawing
File extension CZI	Carl Zeiss Image Data File
File extension CZIP	ZipGenius CryptoZip File
File extension CZP	ClozePro Archive