List of filename extensions / C
This list contains common file name extensions that are used in some operating systems to differentiate between file formats . In other operating systems, file type identification is mainly carried out using the file header, and the MIME type is more important than the file name extension for e-mail attachments . Systems that use the latter two approaches usually ignore the extension completely.
| Filename extension | MIME type | Full name | Remarks, usage |
|---|---|---|---|
| .c | text / plain, text / xc | C source code file | C source code file |
| .c | configuration | CheckPoint VPN Secure Remote Configuration | |
| .cpp, .c ++, .cxx | text / plain, text / xc | C ++ source code file | C ++ source file |
| .C | text / plain, text / xc | C ++ source code file | C ++ source file (rare) |
| .c00 | Ventura Publisher Print File | - | |
| .C01 | Typhoon wave | - | |
| .c2 | C-Controll II module | C-Control-II source text file of the programming language C2 | |
| .c2d | WinOnCD CD image | - | |
| .c2p | C-Controll II project | C-Control-II project file in the C2 programming language | |
| .c4b | Clonk 4 binary file | Clonk | |
| .c4d | Cinema4D scene file | Cinema 4D | |
| .c4d | Clonk 4 object definition | Clonk | |
| .c4f | Clonk 4 round folder | Clonk | |
| .c4g | Clonk 4 system data | Clonk | |
| .c4k | Clonk 4 registration key | Clonk | |
| .c4m | Clonk 4 material definition | Clonk | |
| .c4p | Clonk 4 player file | Clonk | |
| .c4s | Clonk 4 scenario | Clonk | |
| .c4u | Clonk 4 update | Clonk | |
| .c4v | Clonk 4 video | Clonk | |
| .c4x | Clonk 4 engine | Clonk | |
| .C86 | C86 source code | Computer innovation | |
| .approx | Cache file | Telnet Server Initial cache data | |
| .cab | application / vnd.ms-cab-compressed application / x-cab-compressed |
Microsoft Cabinet file | Compressed file archive |
| .cac | Executable file | dBase IV | |
| .cad | Softdesk Drafix Cad | - | |
| .cag | Catalog file | Microsoft Clip Gallery v. 2.x, 3.x, 4.x | |
| .cal | Calendar file | - | |
| .Crash | Crash report | Most 3D editors such as B. Prism3D | |
| .cal | Cakewalk Application Language | Macro file for Cakewalk (MIDI sequencer) | |
| .cal | CALS | Compressed image files | |
| .cal | SuperCalc Spreadsheet | SuperCalc 4/5 | |
| .cam | Casio camera file | - | |
| .can | Canvas | Navigator fax | |
| .cap | - | Capella (notation) | |
| .cap | Capture file | Telix session | |
| .cap | Caption | Ventura Publisher | |
| .car | AtHome assistant file | - | |
| .car | Carrara file | 3D software from DAZ Productions | |
| .carc | Nintendo texture, graphic, plates, course file | Nintendo Editor Tool | |
| .cas | Comma-delimited ASCII file | - | |
| .cat | Security catalog | Windows | |
| .cat | Catalog file | dBase | |
| .cat | - | Casio program link FA-123 | |
| .cat | tree-ring width data file | CAT RAS: C omputer A ided T ree R ing A nalysis S ystem | |
| .cat | categorization file | Quicken IntelliCharge | |
| .cat | Stellarium Star Catalog | Stellarium | |
| .CATpart | Part file | CAD / Catia V5 | |
| .cb | clean boot file | Microsoft | |
| .cbc | CubiCalc Fuzzy Logic | System file | |
| .cbf | Atari DOS Chebase file | DOS | |
| .cbf | ChessBase file | Proprietary format for storing chess games (replaced by the CBH format) | |
| .cbf | CSDL document | contains a Specification and Description Language specification | |
| .cbh | ChessBase file | Proprietary format for saving chess games (from 1997, version Chessbase 6.0) | |
| .cbi | Column binary | Use in IBM mainframe systems | |
| .cbk | CryptoBackup File | Encrypted CryptoBackup file (only with unencrypted file names) | |
| .cbl | Cobol | Cobol source code | |
| .cbm | Compiled bitmap | XLib | |
| .cbr | Comic book rar archives | Can z. B. open with the CDisplay program | |
| .cbt | Computer based training | - | |
| .cbz | application / x-cbr | Comic book zip | Comic book format |
| .cc | C ++ source code file | C ++ source file | |
| .cc | custom class | Visual dBASE | |
| .cc3 | CUEcards database | Notes management | |
| .cca | cc: mail archive | - | |
| .ccb | Animated button configuration | Visual Basic | |
| .ccc | Curtain Call Native bitmap | Image files | |
| .ccd | CloneCD Image Control File | CD image configuration file created with CloneCD | |
| .cce | calendar | Calendar Creator Plus | |
| .ccf | - | Configuration of the OS / 2 multimedia viewer | |
| .ccf | Database | MediaDex catalog | |
| .ccf | Communications Configuration | Symphony | |
| .ccf | Concerto Container File | Data with layouts (AVL Concerto) | |
| .ccf | CryptLoad Container File | File list of the CryptLoad download manager ( Rapidshare ) | |
| .cch | Corel chart | - | |
| .ccl | Communication Command Language | Intalk | |
| .ccm | Lotus CC: Mail "box" file | for example: INBOX.CCM | |
| .cco | CyberChat file | - | |
| .cco | XBTX Graphics | - | |
| .ccs | Citavi citation style file | Citavi | |
| .cct | Shockwave cast file | Macromedia Director | |
| .cct | DesignWorks file | DesignWorks Viewer | |
| .cda | CD audio track | - | |
| .cdb | CardScan Database | CardScan | |
| .cdb | Clipboard file | Clipboard | |
| .cdb | Conceptual model backup | PowerDesigner | |
| .cdb | Critical Data Block Keyfile | FreeOTFE | |
| .cdb | Main database | Turbo C Utilities | |
| .cdb | Pocket Access Database | Kaisoft Access Manager for Pocket PC | |
| .cdf | Channel definition format | Microsoft | |
| .cdf | application / cdf, application / x-cdf | Netcdf Graphic file | Image files |
| .cdfs | Compact Disc filing system | WindRiver CD file system | |
| .cdi | Compact Disc Interactive | Philips CDi standard | |
| .cdi | - | CD image created with DiscJuggler | |
| .cdk | Atari Calamus Document | - | |
| .cdm | Conceptual data model | Sybase PowerDesigner Data Architect | |
| .cdm | Custom data module | Visual dBASE | |
| .cdm | C ustom D evice M odules | Device drivers in the NetWare Peripheral Architecture (NWPA) from Novell NetWare | |
| .cdm5 | Connection file for the management console Citavi 5 for DBServer Manager | Citavi | |
| .cdp | Content dispatcher package | Packaged content for the PC railway simulation Trainz | |
| .cdr | CorelDRAW file | File of the vector graphics program CorelDRAW | |
| .cdr | CD raw data | Contains raw data from a CD | |
| .cds | ClientDataSet | Contains database tables from MyBase ( Borland Delphi ) | |
| .cdt | CorelDRAW template | template | |
| .cdx | CorelDRAW compressed drawing | Compressed CDR | |
| .cdx | Compound index | Microsoft Visual Foxpro | |
| .cdy | application / vnd.cinderella | Cinderella Construction file | Geometry program Cinderella |
| .ce | Main CE file | The FarSide Computer Calendar | |
| .ceg | Tempra Show Bitmap graphic | Image files | |
| .cel | AutoDesk Animator Cel Image | - | |
| .cel | CIMFast Event Language file | - | |
| .cerium | application / pkix-cert, application / x-x509-ca-cert | Certificate file | MIME x-x509-ca-cert |
| .cf | Imake configuration file | - | |
| .cfb | Compton's multimedia file | - | |
| .cfg | Configuration file | Configuration file | |
| .cfl | CorelFLOW Chart | - | |
| .cfm | ColdFusion template | - | |
| .cfm | Corel FontMaster file | - | |
| .cfm | Creative FM music | - | |
| .cfm | Windows customer form | Visual dBASE | |
| .cfn | Atari Calamus Font File | - | |
| .cfo | C form object | Turbo C Utilities | |
| .cfp | Complete Fax Portable | Fax file | |
| .cga | - | Ventura Publisher screen font | |
| .cgf | Crytek Geometry File | Storage format for 3D models of the CryEngine | |
| .cgi | Common gateway interface script | - | |
| .cgm | Computer Graphics Metafile | Vector graphics | |
| .ch | Clipper 5 headers | - | |
| .ch | OS / 2 configuration file | - | |
| .ch3 | Chart | Harvard Graphics 3.0 | |
| .ch4 | Charisma Presentation | Charisma 4.0 | |
| .chd | Chameleon Font descriptor | - | |
| .chf | remote control file | pcAnywhere | |
| .chi | ChiWriter Document | - | |
| .chk | Check disk | Contains lost data chains recovered by the MS-DOS / Windows programs Checkdisk and Scandisk | |
| .chk | - | WordPerfect for Windows temporary file | |
| .chl | Configuration History Log | - | |
| .chm | Compiled HTML Help | Help file in CHM format, used under Windows (from Windows 98 ); compressed HTML archive | |
| .chn | Ethnograph data file | - | |
| .chp | Chapter file | Ventura Publisher | |
| .chr | Character sets | Fonts | |
| .cht | ChartMaster dBase Interface | - | |
| .cht | ChartViewer file | - | |
| .cht | Harvard Graphics Vector file | - | |
| .chw | - | Content file for .chm | |
| .cif | CalTech Intermediate Graphic | - | |
| .cif | Creator Image File | CD image created with Easy CD Creator | |
| .cif | caller file | pcAnywhere | |
| .cif | Crystallographic Information File | - | |
| .cil | Clip Gallery download packag | - | |
| .cil | Cilea unit group | Unit group for Cilea | |
| .cim | Sim City 2000 file | - | |
| .cin | - | Monitors modifications to INI files under OS / 2 | |
| .circ | circuit | File type for displaying circuits, e.g. B. with Logisim | |
| .cix | Database index | Turbo C Utilities | |
| .ck1 ... .ck6 | Commander Keen data | iD / Apogee Commander Keen 1 ... 6 | |
| .ckb | Keyboard mapping file | Borland C ++ | |
| .cl | Generic LISP | LISP source code | |
| .cl3 | Layout file | Adaptec Easy CD Creator | |
| .class | application / java, application / java-byte-code, application / x-java-class | Java .class file | Bytecode executable by the Java Virtual Machine |
| .clc | APROL ChronoLog container | Files are written by the ChronoLogServer program. (LINUX) | |
| .cld | Print template for CD label print | Canon printer | |
| .clg | Disk Catalog database | - | |
| .cll | Cricket Software Clicker File | - | |
| .clo | Cloe Image | - | |
| .clp | Compiler script | Clipper 5 | |
| .clp | Clip art | Quattro Pro | |
| .clp | application / x-msclip | Clipboard | Windows clipboard |
| .clr | color screen image | 1st reader | |
| .clr | Color definition | PhotStyler | |
| .cls | Class source file | C ++ class module definition | |
| .cls | Class source file | Visual Basic class module definition | |
| .cls | Class definition | LaTeX document class | |
| .clt | APROL ChronoLog template | Templates used for formatting ChronoLog containers (.clc). (LINUX) | |
| .clw | Class Wizard | Microsoft Visual C ++ | |
| .clw | Source code file | Clarion for Windows source code | |
| .clz | Tomb Raider 6 Archives | Compressed archive with audio (AWD) or level data (GMX) | |
| .cm | Craftman Data | - | |
| .cma | - | APPLIX TM1 : database in plain text format | |
| .cmd | External Command Menu | 1st reader | |
| .cmd | Command file | Batch scripts for Windows NT, OS / 2, CP / M-86 and RSX11 | |
| .cmd | Program file | dBase-II | |
| .cme | Diagram file | SeeMe editor for the SeeMe modeling method | |
| .cmf | Corel Metafile | - | |
| .cmg | Chessmaster saved game | - | |
| .cmk | Card Shop Plus file | - | |
| .cmm | CEnvi batch file | - | |
| .cml | Chemical Markup Language File | Chemical Markup Language , XML-based file format for representing molecules | |
| .cmp | Postscript printer header | CorelDRAW 4.0 | |
| .cmp | - | JPEG bitmap | |
| .cmp | User dictionary | Microsoft Word for DOS | |
| .cmp | Address Document | Route 66 | |
| .cmr | MediaPlayer Movie | - | |
| .cmv | Corel Move animation | - | |
| .cmx | image / x-cmx | Corel Presentation Exchange image | - |
| .cmyk | cyan, magenta, yellow, and black | Raw data | |
| .cnc | CNC General Program data | - | |
| .cnf | Configuration | Configuration file | |
| .cnq | Compuworks Design Shop | - | |
| .cnt | Contents | Index file for help files under Windows | |
| .cntl | z / OS JCL program library | PDS with batch files | |
| .cnv | Conversion files | files to be converted (WsFTP) | |
| .cnv | conversion support file | Word for Windows | |
| .cnv | Temporary file | WordPerfect for Windows | |
| .cnv | Canvas drawing | Cancas file (vector format) | |
| .cob | Cobol | Cobol source code | |
| .cob | trueSpace 2 object | 3D objects | |
| .cod | Template source file | dBase application generator | |
| .cod | FORTRAN compiled code | - | |
| .cod | compiled code | Microsoft C Compiler Edition | |
| .cod | Video text file | - | |
| .cof | Container file | Container file for a download manager | |
| .col | Color palette | AutoDesk Animator | |
| .col | Multiplan spreadsheet | Microsoft Multiplan | |
| .com | application / octet-stream, text / plain | Command / Core Image | Batch file (Betr.Syst. Of DEC ) Executable program ( CP / M / DOS / Windows ). With PC-DOS also binary file of the operating system (see .SYS). The formats of CP / M and DOS are for different processors and therefore not identical. If a .COM and an .EXE file with the same name are in the same directory, the .COM file is executed by default. |
| .con | configuration | Simdir | |
| .conf | text / plain | Configuration | Configuration file under Unix , mostly plain text (e.g. /etc/inetd.conf) |
| .config | text / plain | Configuration | Configuration file under .NET or configuration file under Unix , mostly plain text |
| .contact | Windows Live Contact | Windows Live Contact format, e.g. B. for Windows contacts | |
| .contrib | - | Rest after merging in ClearCase | |
| .coo | Components File | Fabasoft Components | |
| .cp4 | Cplan | Track plan for CPlan track plan Game | |
| .cp8 | CP8 256 Gray Scale image | Image files | |
| .cpc | Cartesian Perceptual Compression | Image files (for CPC Viewer) | |
| .cpd | Complaints Desk Script | - | |
| .cpd | Corel PrintOffice file | drawing | |
| .cpd .cpe | - | Fax cover sheet | |
| .cpf | Complete fax | Fax file | |
| .cph | Corel Print House | Image files | |
| .cpi | AVCHD C li p I nformation: Information about the video | AVCHD videos, SONY video format | |
| .cpi | ColorLab Processed Image | Image files | |
| .cpi | code page information | Code page specification for MS-DOS and FreeDOS | |
| .cpio | application / x-cpio | cpio -Archiv | Archive format of the Unix command cpio |
| .cpj | CD Project | CeQuadrant | |
| .cpj | Track image | WinOnCD | |
| .cpj | CADdy electrical project | CADdy (software) | |
| .cpl | Compel Presentation | - | |
| .CPL | Corel color palette | - | |
| .cpl | Control Panel Library | Windows Control Panel applet | |
| .cpo | Corel Print Office | Image files | |
| .cpp | text / xc | C Plus Plus (C ++) | C ++ source file |
| .cpp | Cricket Presents presentation | CA cricket | |
| .cpr | Corel Presents presentation | - | |
| .cpr | Cubase Project | Project file of the Cubase sequencer | |
| .cps | PC Tools Backup | Central Point | |
| .cps | Colored postscript | colored postscript | |
| .cpt | application / x-cpt | Cricket Presents Template | CA cricket |
| .cpt | Corel Photo-Paint image | Image files | |
| .cpt | Encrypted memo | dBase | |
| .cpt | - | Compressed file archive (Macintosh) | |
| .cpx | Corel Presentation Exchange | Compressed drawing | |
| .cpy | Copy books | - | |
| .cpz | COMPOZ Music Text | - | |
| .cr2 | Canon RAW format | Image file in raw data format | |
| .crc | Cyclic Redundancy Check | File for checking data consistency | |
| .crc | Circular reference file | Pro / Engineer | |
| .crd | application / x-mscardfile | Cardfile | Microsoft Windows 3.x |
| .crf | cross-reference | Zortech C ++ | |
| .crf | PkZip packed archive | use a lot of games | |
| .crh | Image file | Microsoft Golf | |
| .crl | application / pkcs-crl, application / pkix-crl | Certificate revocation list | File that contains the serial numbers of revoked certificates in PKI environments |
| .crp | Corel run-time presentation | - | |
| .crp | Encrypted database | dBase IV | |
| .crp | custom report | Visual dBASE | |
| .crs | Conversion resource | WordPerfect 5.1 for Windows | |
| .crs | - | AICC course description | |
| .crt | application / pkix-cert | Certificate | Certificate file |
| .crt | Crontab file | - | |
| .crt | Terminal settings information | Oracle | |
| .crt | application / x-x509-ca-cert, application / x-x509-user-cert | CaRTridge Image | Commodore 64 emulator (ROM content of a plug-in module for the expansion port) |
| .cru | CRUSH | Compressed file archive | |
| .crv | Unknown | Curve file, closed freehand line (Curve CAD WorkNC) | |
| .crw | Canon Raw Image | for storing photos in Canon digital cameras | |
| .crx | application / x-chrome-extension | Chrome Extension | Browser extension for Google Chrome , the format largely corresponds to the standard browser extensions |
| .cry | Crysis Map | Crysis maps are saved in this format that can be read by the Crysis editor | |
| .cs | C-Sharp | C-Sharp (C #) source code file | |
| .csa | Comma deliminated text | - | |
| .csb | Cosmo3D scenegraph binary | OpenGL Optimizer / Cosmo3D scene graph file, binary format | |
| .csb | Corel script binary | - | |
| .csb | Crashsoft BASIC | - | |
| .csc | Corel script | - | |
| .csg | Statistica / w graph file | - | |
| .csh | application / x-csh, text / x-script.csh | C shell script files | Hamilton Labs |
| .csi | Copystar (image) | SH-CopyStar, disk copier program | |
| .csl | - | America Online CSL format | |
| .csm | Precompiled header | Borland C ++ 4.5 | |
| .csm | Script file | Kodak Dc265 Camera | |
| .csm | Catography Shop Map | 3D map by TheGameCreators | |
| .cso | Customer service data + outcome | Compressed .iso of a PlayStation Portable game | |
| .csp | PC Emcee On-Screen image | - | |
| .css | Statistica / w Datasheet | - | |
| .css | Stats + data file | - | |
| .css | text / css |
Cascading Style Sheet | Cascading Style Sheets (CSS) - ASCII text files written in a supplementary HTML language for the exact formatting of HTML elements |
| .cst | Cast | Macromedia Director | |
| .cst | - | AICC course structure | |
| .csv | text / comma-separated-values text / csv |
Comma separated values | Text file, table |
| .csv | Adjusted EGA / VGA range | CompuShow | |
| .ct | Cheat Engine Table | ||
| .ct | - | Paint Shop Pro | |
| .ct | Scitex CT bitmap | - | |
| .ctb | color-dependent plot style table | AutoCAD - color-dependent plot style table file, contains exactly 256 plot styles, which are assigned to each color in the drawing (see also .stb ) | |
| .ctc | PC Installer Control | - | |
| .cte | Classification Tree Editor | Classification Tree Editor file, contains test frames and test cases | |
| .ctf | code translation /
Custom PSP Theme |
Symphony Character code /
Sony PSP |
|
| .ctg | Canon Power Shot Info File | ctg = catalog / Canon digital cameras store additional information about the images in it. | |
| .ctl | Control | dBase IV | |
| .ctl | control file | Control file | |
| .ctv | Citavi 2 project file | Citavi | |
| .ctv3 | Citavi 3 project file (database container file) | Citavi | |
| .ctv4 | Citavi 4 project file (database container file) | Citavi | |
| .ctv5 | Citavi 5 for Windows project file (database container file) | Citavi | |
| .ctv5bak | Self-extracting backup of the project file (database container file) from Citavi 5 for Windows | Citavi | |
| .ctvdbs5 | Connection file for the database in Citavi for DBServer | Citavi | |
| .ctx | Course text | Microsoft Online Course | |
| .ctx | Ciphertext | PGP | |
| .ctx | User control binary | Visual Basic | |
| .cub | Cube file | APPLIX TM1 | |
| .cue | CUEcards database | Notes management | |
| .cue | Cue sheet | Audio CD metadata (track ends, etc.) | |
| .cui | application / octet-stream | Customize user interface | AutoCAD configuration file for the user interface |
| .cul | Cursor library | IconForge | |
| .cup | Database file | SeeYou (glider program) | |
| .cur | Cursor file | Mouse pointer (static) | |
| .cursor | cursor | Sun Microsystems | |
| .cut | Dr Halo bitmap | - | |
| .cutlist | Cut Assistant (formerly Asfbin Assistant) | Cutting list for video editing | |
| .cv | Corel Versions archive | - | |
| .cv | information screen | Microsoft CodeView | |
| .cv5 | Canvas drawing | Canvas 5.0 (vector and bitmap; also for Canvas 7.0) | |
| .cvi | Canvas drawing | Image document | |
| .cvg | image | Image files | |
| .cvs | Canvas drawing | Canvas 3.5, artWORKS (vector and bitmap) | |
| .cw | I do not know | Quake3, font file (included in * .pk3) | |
| .cwb | Cakewalk Bundle | - | |
| .cwk | Claris Works data | - | |
| .cwp | Cakewalk Project | - | |
| .cws | Claris Works template | - | |
| .cxt | protected cast | Macromedia Director | |
| .cxx | text / plain | C ++ | C ++ source file |
| .cys | CSWgermany CYberSecure-CryptContainer | Encrypted archive | |
| .cz | StarMoney CAMT file (Windows) | ||
| .czip | Encrypted ZIP | Encrypted archive |