File Extensions beginning with the letter 'C'

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Extension currently sorted on Extension Description click to sort by Description Format MIME Type
c C source code
C C programming language source code
C C code
C++ C++ source code; C__ is C++ in Win32
C-- C source code
C00 Ventura Publisher printer
C01 Typhoon wave files
C3D Micrografx
C86 C source code; Computer Innovation C86
CAB Microsoft cabinet file (program files compressed for software distribution)
CAB Windows Setup file
cab Cabinet (compressed file)
CAB Cabinet; Windows Cabinet Compressed Archive
CAC Microsoft Infoview; see CSC
CAD used by the drafting program "Drafix Cad">by Softdesk
CAD Picture; Drafix Windows CAD
cag Clip Art Gallery. Clipart bundled with older versions of Microsoft Office
CAL Windows Calendar file
cal Computer Associates SuperCalc 5
cal Computer Aided Acquisition and Logistics Support. Image, usually raster but can also be vector. Details
cals Computer Aided Acquisition and Logistics Support. Image, usually raster but can also be vector. Details
CAM Bitmap Picture; Casio camera
CAM Casio Camera
CAM Casio camera format
CAN Fax Document; Navigator Fax
CAP Compressed music file format
CAP (2) Capture
CAP (1) Text; Ventura Publisher Caption
CAS (2) Borland combined C/Assembly source code; see ASM
CAS Comma-delimited ASCII file
CAS (1) Casio Calculator, Communicating Applications Specification
CAT dBase IV catalog
CAT IntelliCharge categorization file used by Quicken
CB Microsoft clean boot file
CBC Spreadsheet; CubiCalc
CBI Column binary formatted file (used in IBM mainframe systems)
CBL Cobol source code; alternate to COB
CBM Bitmap Picture; XLib
CBR Comic Book RAR. A comic book (just a set of pictures really) compressed in a .RAR file.
CBT (1) Microsoft Computer Based Training
CBT (2) Borland Computer Based Training
CBZ Comic Book ZIP. A comic book (really a set of images) compressed into a ZIP file.
CC C++ source code
CC Visual dBASE custom class file
CCA Data; Click 'n Create
CCA cc:mail file
CCB Visual Basic Animated Button configuration
CCC (1) Microsoft Internet Chat Conversation; see CCR
CCC (2) Bitmap Picture; Curtain Call
CCF Lotus Symphony communications configuration; INI
CCF Multimedia Viewer configuration file used in OS/2
CCH Corel Chart
CCH Picture; Corel Chart
CCITT CCITT Group 3 and Group 4 Encoding
CCM Lotus CC:Mail "box" (for example, INBOX.CCM)
CCO CyberChat data file
CCR Microsoft Internet Chat Conversation Shortcut; see CCC
CCT Macromedia Director Shockwave cast
CD Class Designer. from Microsoft Visual Studio 2005. Details
CDA CD Audio track
CDA CD Audio Track
CDA CD audio track
CDA CD Audio Track
CDB Constant Database. More Info
CDB (2) Clipboard Data
CDB (1) Data; CardScan
CDF Cyberspace Description Format
CDF (2) Document; Comma Delimited Format
CDF Microsoft Channel Definition Format file
CDF Common Data Format
cdf channel definition framework
CDF (3) Cyberspace Description Format
CDF (4) Bitmap Picture; NETCDF
CDF (1) Microsoft Internet Explorer (MSHTML) Channel Definition; contains XML codes (MIME: application/x-cdf)
CDI Phillips Compact Disk Interactive format
CDK Document; Atari Calamus
CDL CADKey CADL Language
CDM Visual dBASE custom data module file
CDR Raw Audio-CD data
cdr Corel Draw file (vector image)
CDT Corel Draw Template
CDT Corel Draw template
cdw Corel Draw file (vector image)
cdx compressed database index file
CDX Microsoft's Visual FoxPro index
CDX (2) FoxPro Compound index (Database container)
CDX Corel Draw compressed drawing
CDX (1) Corel Draw compressed drawing
CEG Bitmap Picture; Tempra Show, Edsun Continuous Edge Graphics
CEL CIMFast Event Language file
CEL Picture; Autodesk Animator, Lumena
CEM Computer Graphics Meta-file; see CGM
CER Certificate file (MIME x-x509-ca-cert)
CER Internet Security Certificate; see CRT, DER (MIME: application/x-x509-ca-cert)
CF Configuration; IMAKE.EXE
CFB Comptons Multimedia file
CFF Font; Compact Font Format
CFG Configuration file
CFG Configuration; INI
cfg Configuration file
cfg configuration file
CFG Configuration file
CFL (1) Corel Flow, flow chart; see CFT, FLP
cfl CorelFlow
CFL (2) Microsoft Developer Studio diagram
CFM ColdFusion template files
cfm Corel FontMaster
CFM (1) Cold Fusion Template
CFM Visual dBASE Windows customer form
CFN Font; Atari Calamus
CFO Borland Turbo C; see OBJ
CFP Fax Document; Complete Fax
CFT Flow Chart; Corel Flow Template; see CFL
CGA (1) Bitmap Picture; same as BMP. Saved in CGA resolution for Microsoft MRBC.EXE. see 854, EGA, VGA
CGA (2) Ventura Publisher Screen Font
CGI Common gateway interface script file
CGM Computer Graphics Metafile. Image, usually vector but can also be/contain raster data.
CH OS/2 configuration file
CH Source Code; Clipper Include
CH3 Harvard Graphics for DOS 3.0 Chart; see SY3
ch3 Harvard Graphics chart
CH3 Harvard Graphics 3.0
CH4 Presentation; Charisma 4
CHD Ares Font Chameleon Font description
CHH Source Code; C++ Header
CHI Document; ChiWriter
CHK File recovered by DOS' CHKDSK or Windows' ScanDisk program
CHK File fragments saved by Windows Disk Defragmenter or ScanDisk
CHM (1) Microsoft Compiled HTML Help file; see CHQ, CHW, HHC, HHK
CHM (2) Ares Font Chameleon Source Font; Font outline
CHM Compiled HTML file
CHN Data; Ethnograph
CHO Ares Font Chameleon Output Font
CHP Ventura Publisher chapter
chp Legacy v1.1
CHP Legacy files
CHP Document; Ventura Publisher chapter
CHQ Microsoft HTML Help Full-text Search Index for CHM
CHR Character Sets (Font files)
CHR Character Translation; Borland character set (DOS Graphics)
CHS Corel Presentations Chart Style
CHT Harvard Graphics vector file
CHT ChartViewer file
CHT Harvard Graphics 2.0
cht Harvard Graphics chart
CHT (3) Drawing; Chartmaster
CHT (1) Drawing; Harvard Graphics 2.x Chart
CHT (2) Drawing; dBase chart
CHW Microsoft HTML Help Index; see CHM
CIF (3) ICUr Crystallographic Information
CIF (2) Picture; Caltech Intermediate Format
CIF (1) Ventura Publisher chapter
CIL Clipart Image Library. Part of the clipart system bundled with Microsoft Office
CIM Sim City 200 file
CIN Microsoft Cinemania (CIN96LM CIN96UPD)
CIN OS/2 change control file that tracks changes to an INI file
CIPO Internet; same as CPI
CIS Text; CompuServe Mail
CIT Bitmap Picture; Intergraph scanned picture
CK1 iD/Apogee Commander Keen 1 data file
CK2 iD/Apogee Commander Keen 2 data file
CK3 iD/Apogee Commander Keen 3 data file
CK4 iD/Apogee Commander Keen 4 data file
CK5 iD/Apogee Commander Keen 5 data file
CK6 iD/Apogee Commander Keen 6 data file
CL Source Code; Common Lisp programming language
CLA CLASS Java Class
CLASS Java class
class compiled Java bytecode
CLC Microsoft Schedule+ 7-Habits Mission Statement
CLL Crick Software Clicker File
CLM Micrografx Picture Publisher 7 macro
CLP Windows Clipboard file
clp Windows - Clipboard
CLP (1) Windows Clipboard
CLP (2) Clipper script
CLR (1) PhotoStyler color
CLR (2) 1st Reader
CLS Visual Basic Class Module
CLS (1) Microsoft Visual Basic 4 Class Module Add-In
CLS (3) JavaScript class
cls Visual Basic class module source code
CLS (4) Actor Class Library
CLS (2) C++ class definition
CLW Wizard; Microsoft Visual C++ Class Wizard
CM Data; Craft Man
CMD dBase-II program file
CMD DOS CP/M command file
CMD Command file for Windows NT (similar to a DOS .BAT file), OS/2
CMD OS/2 Command, more advanced than BAT
cmd command file
CMF Sound; Creative Labs
CMF Corel Metafile
CMG Chessmaster saved game
CMK Card Shop Plus
CMP JPEG bitmap
CMP (2) Data; Compressed
CMP Address document
CMP (1) Bitmap Picture; see JPG
CMP LeadView
CMT Corel Draw
CMU Carnegie Mellon University Formats
CMV Corel Draw Animation; Corel Move
CMV Corel Move animation
CMX Corel Presentation Exchange image
CMX Corel Presentation Exchange, Corel Metafile Exchange or Clipart
cmx Corel clipart
CNF (2) Configuration; Lotus uses 123.CNF
CNF (3) Conference Link
CNF (1) Microsoft Windows 95 Speed Dial
CNF Configuration file used by Telnet, Windows, and other applications with varying internal formats
cnf configuration file
CNM Windows application menu options and setup file
CNQ Compuworks Design Shop file
CNR Click-n-run. A package (software) for Linspire. A copy-protected version of a Debian .deb package. More.
CNT Microsoft Windows Help Contents
CNT Help contents
CNT Windows (or other) system content files for the help index and other purposes
cnt table of contents for MSWindows Help
CNV Converter. Microsoft Word plug-in that converts to or from a different word processor's file format.
CO$ Microsoft compressed COM; decompress with UNPACK.EXE
COB (1) COBOL programming language source; see CBL
COB (2) Picture; TrueSpace 3D
COB Calgari trueSpace2 File Format
COB trueSpace2 object
COD (1) StatPac
COD Compressed Over-the-air Deployment. RIM Blackberry application that can be downloaded from a website directly (i.e. without desktop sync).
COD (3) Microsoft Multiplan; see MOD
COD Microsoft C compiler output as displayable machine language/assembler with original C as comments
COD (2) Compiled Fortran
COL (1) Autodesk Animator palette
COL (3) "COLWIZ" Internet Colour Wizard Colour Scheme; uncommon
COL (2) Spreadsheet; Microsoft Multiplan
collada COLLAborative Design Activity. An open XML-based file format 3D vector images. Details.
COM (2) Common Object Module
COM (1) Compiled MS-DOS executable program; see EXE
COM MS DOS and VN DOS program
COM MS-DOS - based application
com Executable Program File
COM Command file (program)
com MS-DOS program
CON (1) Concordance (WordPerfect Document)
CON (2) Application Information; see INI
conf configuration file
CP C++ Source Code; see CPP
CPD Fax Cover document
CPD Cover fax extension
CPD (2) Script; Complaint Desk
CPD (1) Fax cover page (Windows)
CPD Corel PrintOffice file (drawing)
CPD FAX cover page
CPE Fax Cover document
CPE Fax cover page (Windows)
CPE Cover fax extension
CPE FAX cover page
CPF Fax Document; Complete Fax
CPH Picture; Corel Print House (simple layout program)
CPI (1) Character Translation; Windows or DOS International code page
CPI International code page
CPI (2) Cartesian Products Compressed Internet Document
CPI Microsoft MS-DOS code page information file. Complete specs
CPI (3) Bitmap Picture; Color Lab
CPL Control panel extension
CPL (1) Windows Control Panel extension; see DLL
CPL (2) Compel presentation
CPL Control Panel extension
cpl MSWindows Control Panel applet
CPL Corel color palette
CPL Control Panel extension
CPO Corel Print House file
CPP Source Code; C++ Source
cpp C++ source code
CPP Presentation; CA Cricket Presents
CPP C++ code
CPR Corel Presents presentation
CPR (1) Corel Presentation
CPR (2) Bitmap Picture; Knowledge Access
CPS Backup of SYS or BAT file by QEMM
CPT (3) dBase encrypted memo
CPT Corel Photo-Paint image
CPT (4) Archive; Macintosh Compact Pro
CPT (2) CA-Cricket Template
CPX Corel Presentation Exchange compressed drawing
CPX (1) Character Translation; Character set translation table
CPX (2) Corel Presentation Exchange; see CPR
CPY Cobol Include
CPZ Sound; Compoz
CR2 Canon RAW version 2. Photograph from a Canon camera. [RAW]
CRD Cardfile file
CRD Windows Cardfile document
CRD Index Card
CRE Sound; Crescendo Encrypted Music
CRF Programming Language cross-reference
CRL Inprise (Borland) Delphi Games Creator Introduction Library; IML, MAP, SDL
CRP (2) Database; dBase IV Encrypted Database
CRP Corel Presents run-time presentation
CRP Visual dBASE custom report file
CRP (1) Corel Presentation; see CPR
CRT Internet Security Certificate; see CER, DER (MIME: application/x-x509-ca-cert)
CRT Certificate file
CRU Archive; Crush Compressed Archive
CRW Canon RAW. Photograph from a Canon camera. [RAW]
CSC Corel script
CSC (2) Corel Flow Wizard script language
CSC (3) Corel Script 6.0 Script; see WCH
CSC (1) Wizard; see CAC
CSF Content Sealed Format. Proprietary and undocumented competitor to PDF from Informative Graphics Corp.
CSG Graph; Statistica
CSH Internet Program
CSP Bitmap Picture; PC Emcee, Computer Support Corporation
CSP PC Emcee On-Screen image
CSQ Database; FoxPro Query
CSS Cascading Style Sheet file (MIME)
CSS (1) Internet HTML Cascading Style Sheet. May also be CSS1 file extension (MIME: text/css)
css cascading style sheet
CSS (2) Statistica Data; Stats+
CST Macromedia Director "Cast" (resource) file
CSV Palette; CompuShow
csv comma separated value [csv] text/csv
CT Bitmap Picture; Scitex CT
CT A graphic file associated with the Paint Shop Pro Graphic Editor
CT Scitex CT Bitmap
CTBL Dynamic color table; SHAM
CTF (1) Lotus Symphony character translation
CTF (2) HP-95 Comm program character translation; see DCF
CTL Used in general to mean a file containing control information. FAXWorks uses it to keep information about each fax sent and received.
ctl Visual Basic custom control source code
CTM CGMetafile; see CGM
ctx binary data for a Visual Basic custom control
CTX Pretty Good Privacy
CUE Audio CD Track Layout. Details.
CUE Microsoft Cue Cards data
CUR Windows Cursor
CUR Cursor
CUR Windows Cursor
cur MSWindows cursor
CUR Static cursor file
CUR Cursor (pointer)
cur Windows Cursor File
CUT raster image from Dr Halo. Details
CV Microsoft CodeView information screen
CV Corel Versions archive
CV4 Microsoft CodeView color configuration
CV5 Vector Drawing; Canvas 5
CVF Compressed Volume; Microsoft Drive Space 3 disk compression
CVP Fax Document; WinFax cover page
CVR Fax Document; WinFax Pro Cover Page
CVS Vector Drawing; Canvas
cvt converter
CWK Claris Works
CWK Claris Works data file
CWS Claris Works template
CW_ Corel Ventura Publisher work-space
CXF Italian Cadastral Exchange Format. Vector image. Conversion utility.
CXT Macromedia Director protected (not editable) "Cast" (resource) file
CXX C++ Source
CXX C++ source code file
CYA Cyan color separation. BLA (Black), MAG (Magenta), YEL (Yellow) Adobe Color Separation
C__ C++ Source; C__ is C++ in Win32; see C++