Windows
Support Guide

Applies to: Microsoft Windows (All versions)
Home Find file extension (eg.: .doc,.png)

File extension?

A file extension is a suffix to the name of a computer file, which defines and determines easily the file's generic type. In Windows and DOS operating system file extension is a requirement whereas, in some other operating system such as UNIX it is optional. Usually the file extension consists of two, three or four characters following a period.
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Recently updated file extensions

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Find file extension (eg.: .pdf)

.c - Source code and script files

.c-- - Source code and script files

.c00 - Archive file type

.c01 - Audio file type

.c02 - Miscellaneous file type

.c03 - Miscellaneous file type

.c04 - Miscellaneous file type

.c05 - Miscellaneous file type

.c06 - Miscellaneous file type

.c07 - Miscellaneous file type

.c08 - Miscellaneous file type

.c09 - Miscellaneous file type

.c10 - Miscellaneous file type

.c11 - Miscellaneous file type

.c12 - Miscellaneous file type

.c13 - Miscellaneous file type

.c14 - Miscellaneous file type

.c15 - Miscellaneous file type

.c16 - Image file type

.c17 - Miscellaneous file type

.c18 - Miscellaneous file type

.c19 - Miscellaneous file type

.c2c - Miscellaneous file type

.c2d - Disk Image file type

.c2r - Data file type

.c3d - Miscellaneous file type

.C3L - Miscellaneous file type

.c3v - Miscellaneous file type

.c4d - Graphic file type

.c8 - Miscellaneous file type

.c86 - Executable file type

.ca - Internet related file type

.ca? - Miscellaneous file type

.ca5 - Miscellaneous file type

.cab - Archive file type

.cac - Text file type

.cache - Configuration file type

.cad - Graphic file type

.cae - Graphic file type

.caf - Audio file type

.CakewalkStudioWare - Miscellaneous file type

.CakewalkWindowLayou...dll - Miscellaneous file type

.cal - Data file type

.cals - Graphic file type

.cam - Image file type

.camacro - Miscellaneous file type

.camp - Miscellaneous file type

.camproj - Miscellaneous file type

.camrec - Miscellaneous file type

.camthtr - Miscellaneous file type

.camtrack - Miscellaneous file type

.can - Graphic file type

.cap - Data file type

.caption - Miscellaneous file type

.car - Graphic file type

.cas - Miscellaneous file type

.Case - Miscellaneous file type

.cat - Miscellaneous file type

.catalog - Miscellaneous file type

.caw - Miscellaneous file type

.cb - Miscellaneous file type

.cba - Archive file type

.cbak - Miscellaneous file type

.cbc - System file type

.cbl - Source code and script files

.cbm - Image file type

.cbn - Miscellaneous file type

.CBPROJ - Miscellaneous file type

.cbr - Archive file type

.cbs - Miscellaneous file type

.cbt - Miscellaneous file type

.cbu - Miscellaneous file type

.cbx - Miscellaneous file type

.cbz - Archive file type

.cc - Source code and script files

.cc5 - Miscellaneous file type

.cca - Miscellaneous file type

.ccc - Miscellaneous file type

.ccd - Disk Image file type

.cce - Miscellaneous file type

.ccf - Data file type

.cch - Data file type

.ccitt - Miscellaneous file type

.ccl - Miscellaneous file type

.cco - Miscellaneous file type

.ccp - Miscellaneous file type

.ccs - Miscellaneous file type

.ccsproj - Miscellaneous file type

.cct - Data file type

.ccw - Miscellaneous file type

.cd - Text file type

.cd2 - Text file type

.cda - Audio file type

.cdas - Miscellaneous file type

.cdb - Graphic file type

.cdc - Miscellaneous file type

.CDD - Miscellaneous file type

.cdda - Audio file type

.CDE - Miscellaneous file type

.cdf - Internet related file type

.cdg - Image file type

.cdi - Archive file type

.cdk - Miscellaneous file type

.cdl - Configuration file type

.cdm - System file type

.cdml - Miscellaneous file type

.cdmm - Miscellaneous file type

.cdmp - Miscellaneous file type

.cdmt - Miscellaneous file type

.cdmtz - Miscellaneous file type

.cdmz - Miscellaneous file type

.cdo - Miscellaneous file type

.cdp - Miscellaneous file type

.cdpx - Miscellaneous file type

.cdpz - Miscellaneous file type

.cdr - Image file type

.cds - Miscellaneous file type

.cdt - Graphic file type

.cdv - Miscellaneous file type

.cdw - Miscellaneous file type

.cdx - Database file type

.ce - Image file type

.ceb - Text file type

.cedprj - Miscellaneous file type

.cef - Internet related file type

.ceg - Graphic file type

.cel - Configuration file type

.celcproj - Miscellaneous file type

.celx - Miscellaneous file type

.cer - Data file type

.cert - Miscellaneous file type

.cf - Data file type

.CF3 - Miscellaneous file type

.cfa - Video file type

.cfc - Internet related file type

.cfe - Encrypted file type

.cfg - Configuration file type

.cfge - Miscellaneous file type

.cfl - Archive file type

.cfm - Internet related file type

.cfml - Miscellaneous file type

.cfn - Miscellaneous file type

.cfo - Data file type

.cfosspeed - Miscellaneous file type

.cfy - Miscellaneous file type

.cgm - Graphic file type

.cgp - Miscellaneous file type

.ch_ - Data file type

.cha - Configuration file type

.chat - Miscellaneous file type

.chc - Data file type

.che - Miscellaneous file type

.chesstitanssave-ms - Game file type

.CHJ - Miscellaneous file type

.chk - Game file type

.chm - Executable file type

.chm_aq - Miscellaneous file type

.chm2 - Miscellaneous file type

.chp - Miscellaneous file type

.chr - Font file type

.CHS - Miscellaneous file type

.cht - Graphic file type

.chtml - Miscellaneous file type

.chx - Miscellaneous file type

.chz - Archive file type

.ci - Miscellaneous file type

.cid - Miscellaneous file type

.cida - Miscellaneous file type

.cif - Disk Image file type

.cii - Miscellaneous file type

.cil - Miscellaneous file type

.cim - Miscellaneous file type

.cin - Image file type

.cip - Encrypted file type

.cit - Data file type

.CitM - Miscellaneous file type

.cix - Database file type

.cjstyles - Miscellaneous file type

.ck9 - Miscellaneous file type

.ckb - Miscellaneous file type

.ckp - Miscellaneous file type

.ckt - Data file type

.CKZ - Miscellaneous file type

.cl - Data file type

.cl1 - Miscellaneous file type

.cl3 - Miscellaneous file type

.cl4 - Text file type

.cl5 - Disk Image file type

.cla - Source code and script files

.class - Data file type

.clb - Miscellaneous file type

.clbx - Miscellaneous file type

.cld - Data file type

.clf - Miscellaneous file type

.cli - Miscellaneous file type

.clk - Graphic file type

.clm - Miscellaneous file type

.clo - Miscellaneous file type

.CloneCD - Miscellaneous file type

.CloneDVD - Miscellaneous file type

.CloneDVDmobile - Miscellaneous file type

.clp - Data file type

.clpprj - Miscellaneous file type

.clproj - Miscellaneous file type

.clr - Configuration file type

.cls - Data file type

.clt - Miscellaneous file type

.clw - Miscellaneous file type

.clx - Miscellaneous file type

.cm - Configuration file type

.cm_ - Miscellaneous file type

.CMA - Miscellaneous file type

.cmb - Backup file type

.cmc - Miscellaneous file type

.CMCSend - Miscellaneous file type

.cmd - Executable file type

.cmd_aq - Miscellaneous file type

.CME - Miscellaneous file type

.cmf - Data file type

.cmi - Miscellaneous file type

.cmk - Miscellaneous file type

.cml - Miscellaneous file type

.cmm - Miscellaneous file type

.cmmp - Miscellaneous file type

.cmmtpl - Miscellaneous file type

.cmo - Miscellaneous file type

.cmp - Graphic file type

.cmp7 - Miscellaneous file type

.cms - Source code and script files

.cmu - Image file type

.cmv - Image file type

.cmw - Miscellaneous file type

.cmx - Miscellaneous file type

.cmyk - Miscellaneous file type

.cnc - Data file type

.cnd - Miscellaneous file type

.cndb - Miscellaneous file type

.cndx - Miscellaneous file type

.cnf - Configuration file type

.cns - Configuration file type

.cnt - System file type

.cnv - Data file type

.co - Miscellaneous file type

.coa - Miscellaneous file type

.cob - Source code and script files

.cod - Data file type

.coe - Miscellaneous file type

.COF - Miscellaneous file type

.col - Miscellaneous file type

.col45 - Miscellaneous file type

.col50 - Miscellaneous file type

.collada - Graphic file type

.collage - Miscellaneous file type

.collection - Miscellaneous file type

.com - Executable file type

.com_ - Miscellaneous file type

.com_aq - Miscellaneous file type

.comfycakessave-ms - Game file type

.comicdoc - Miscellaneous file type

.comicstl - Miscellaneous file type

.comictpl - Miscellaneous file type

.CommandLine - Miscellaneous file type

.Comparison7 - Miscellaneous file type

.compositefont - Data file type

.con - Configuration file type

.conf - Configuration file type

.config - Configuration file type

.configsettings - Miscellaneous file type

.conn - Miscellaneous file type

.contact - Miscellaneous file type

.ContentsOnClipboard - Miscellaneous file type

.conv - Miscellaneous file type

.ConverterX - Miscellaneous file type

.CorelProject - Miscellaneous file type

.CorelShow - Miscellaneous file type

.CorelShowProject - Miscellaneous file type

.cos - Miscellaneous file type

.costyle - Miscellaneous file type

.cov - Miscellaneous file type

.coverage - Miscellaneous file type

.coveragexml - Miscellaneous file type

.cp - Miscellaneous file type

.cp2 - Miscellaneous file type

.cpc - Graphic file type

.cpd - Image file type

.cpe - Miscellaneous file type

.cpf - Text file type

.cph - Miscellaneous file type

.cpi - Graphic file type

.cpio - Archive file type

.CPJ - Miscellaneous file type

.cpl - Text file type

.cpl_aq - Miscellaneous file type

.cpp - Source code and script files

.cpq - Miscellaneous file type

.cpr - Data file type

.cps - Miscellaneous file type

.cpt - Graphic file type

.cptl - Miscellaneous file type

.cptx - Miscellaneous file type

.cpx - Miscellaneous file type

.cpy - Text file type

.cpz - Archive file type

.cqe - Miscellaneous file type

.cr - Miscellaneous file type

.cr2 - Graphic file type

.cr2 valuetype: stri...dll - Miscellaneous file type

.cra - Miscellaneous file type

.crb - Miscellaneous file type

.crc - Data file type

.crd - Database file type

.crdownload - Miscellaneous file type

.crds - Backup file type

.cre - Miscellaneous file type

.crev - Miscellaneous file type

.crf - Miscellaneous file type

.crk - Miscellaneous file type

.crl - Encrypted file type

.crmlog - System file type

.cro - Miscellaneous file type

.crom - Miscellaneous file type

.crp - Graphic file type

.crs - Game file type

.crt - Internet related file type

.crt_aq - Miscellaneous file type

.crtx - Data file type

.cru - Archive file type

.crw - Graphic file type

.crw valuetype: stri...dll - Miscellaneous file type

.crx - Miscellaneous file type

.cryptology - Miscellaneous file type

.CRYSISJMSF - Miscellaneous file type

.cs - Source code and script files

.cs1 - Miscellaneous file type

.csa - Data file type

.csaplan - Miscellaneous file type

.csc - Miscellaneous file type

.csdproj - Miscellaneous file type

.cse - Miscellaneous file type

.csf - Settings file type

.csg - Miscellaneous file type

.csgen - Miscellaneous file type

.csh - Miscellaneous file type

.csi - Miscellaneous file type

.csk - Miscellaneous file type

.CSL - Miscellaneous file type

.csm - Source code and script files

.csmap - Miscellaneous file type

.cso - Archive file type

.csp - Internet related file type

.csplan - Miscellaneous file type

.csproj - Source code and script files

.css - Source code and script files

.css1 - Miscellaneous file type

.css2 - Miscellaneous file type

.cssf - Miscellaneous file type

.cst - Source code and script files

.cstheme - Miscellaneous file type

.csv - Database file type

.csw - Miscellaneous file type

.csy - Miscellaneous file type

.csz - Miscellaneous file type

.ct - Game file type

.cta - Miscellaneous file type

.ctb - Miscellaneous file type

.ctc - Data file type

.ctf - Data file type

.ctg - Miscellaneous file type

.cth - Miscellaneous file type

.ctl - Data file type

.ctlic - Miscellaneous file type

.ctm - Miscellaneous file type

.ctp - Archive file type

.CTR - Miscellaneous file type

.ctt - Data file type

.CTV - Miscellaneous file type

.ctx - Backup file type

.cu_ - Archive file type

.cub - Miscellaneous file type

.cube - Miscellaneous file type

.cue - Disk Image file type

.cuf - Source code and script files

.cui - Miscellaneous file type

.cuix - Miscellaneous file type

.cul - Miscellaneous file type

.cur - System file type

.CurExScheme - Miscellaneous file type

.CursorFX - Miscellaneous file type

.CurXPTheme - Miscellaneous file type

.cus - Miscellaneous file type

.cut - Image file type

.cv1 - Miscellaneous file type

.cv2 - Miscellaneous file type

.cv4 - Source code and script files

.CV5 - Miscellaneous file type

.cva - Miscellaneous file type

.cvi - Miscellaneous file type

.cvp - Miscellaneous file type

.cvra - Miscellaneous file type

.CVREG - Miscellaneous file type

.cvs - Graphic file type

.cvt - Database file type

.cvw - Miscellaneous file type

.cvx - Graphic file type

.cwb - Miscellaneous file type

.cwd - Miscellaneous file type

.cwg - Miscellaneous file type

.cwh - Miscellaneous file type

.cwk - Text file type

.cwlic - Miscellaneous file type

.cwm - Miscellaneous file type

.cwp - Miscellaneous file type

.cws - Miscellaneous file type

.cwt - Miscellaneous file type

.cxp - Miscellaneous file type

.cxt - Data file type

.cxx - Source code and script files

.CZF - Miscellaneous file type

.czip - Miscellaneous file type

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