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)

.u255law - Miscellaneous file type

.u32 - Miscellaneous file type

.u3p - Executable file type

.u4a - Miscellaneous file type

.u4b - Miscellaneous file type

.u5a - Miscellaneous file type

.u5b - Miscellaneous file type

.u8 - Miscellaneous file type

.UAA - Miscellaneous file type

.uar - Miscellaneous file type

.uax - Audio file type

.ub - Audio file type

.ub6 - Miscellaneous file type

.ubn - Miscellaneous file type

.UBX - Miscellaneous file type

.uc - Game file type

.uc2 - Archive file type

.ucb - Miscellaneous file type

.ucd - Miscellaneous file type

.ucf - Configuration file type

.ud - Miscellaneous file type

.udb - Data file type

.udc - Miscellaneous file type

.udf - Disk Image file type

.udl - Miscellaneous file type

.udo - Graphic file type

.udt - Miscellaneous file type

.udw - Miscellaneous file type

.ueed - Miscellaneous file type

.ueef - Miscellaneous file type

.uenc - Encrypted file type

.ues - Image file type

.uez - Miscellaneous file type

.ufa - Archive file type

.uff - Miscellaneous file type

.ufi - Configuration file type

.ufo - Image file type

.ufp - Miscellaneous file type

.uga - Miscellaneous file type

.ugr - Miscellaneous file type

.uha - Archive file type

.uhs - Binary file type

.ui - Configuration file type

.uid - Miscellaneous file type

.uif - Disk Image file type

.uih - Miscellaneous file type

.uin - Miscellaneous file type

.uis - Miscellaneous file type

.uk5 - Miscellaneous file type

.ukc - Miscellaneous file type

.uki - Miscellaneous file type

.ukk - Miscellaneous file type

.ukm - Miscellaneous file type

.ukp - Miscellaneous file type

.ul - Miscellaneous file type

.uland - Miscellaneous file type

.ulaw - Miscellaneous file type

.uld - Miscellaneous file type

.ulf - Data file type

.ulg - Image file type

.uls - Miscellaneous file type

.ult - Audio file type

.ultima_website - Miscellaneous file type

.ulw - Miscellaneous file type

.uma - Miscellaneous file type

.umb - Miscellaneous file type

.ump - Miscellaneous file type

.umx - Archive file type

.und - Miscellaneous file type

.unf - Miscellaneous file type

.uni - Audio file type

.unif - Miscellaneous file type

.unk - Miscellaneous file type

.unknownfile - Miscellaneous file type

.uno - Miscellaneous file type

.unt - Miscellaneous file type

.unx - Text file type

.uoml - Miscellaneous file type

.up - Miscellaneous file type

.upd - Miscellaneous file type

.upg - Miscellaneous file type

.upi - Graphic file type

.upj - Miscellaneous file type

.upl - Miscellaneous file type

.upo - Miscellaneous file type

.upr - Miscellaneous file type

.UPX - Executable file type

.urd - Miscellaneous file type

.url - Internet related file type

.urls - Miscellaneous file type

.urr - Miscellaneous file type

.urt - Image file type

.us - Text file type

.usc - Miscellaneous file type

.user - Miscellaneous file type

.UserProfile - Miscellaneous file type

.usp - Miscellaneous file type

.usr - Data file type

.ustar - Miscellaneous file type

.ut! - Miscellaneous file type

.uti - Archive file type

.utl - Miscellaneous file type

.uts - Miscellaneous file type

.utt - Miscellaneous file type

.utz - Miscellaneous file type

.uu - Archive file type

.uue - Encrypted file type

.uus - Miscellaneous file type

.uvcab - Miscellaneous file type

.uvf - Miscellaneous file type

.uvnts - Miscellaneous file type

.uvr - Miscellaneous file type

.uvs - Miscellaneous file type

.uvseg - Miscellaneous file type

.uw - Miscellaneous file type

.uwf - Audio file type

.uwl - Configuration file type

.uxdc - Miscellaneous file type

.uzb - Miscellaneous file type

.uze - Miscellaneous file type

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