Extension | File Type | File Description |
U | Audio Files | AU Audio File |
U | Image Files | Subsampled raw YUV bitmap image |
U32 | Data Files | Authorware cover file |
U3D | 3D Graphics Files | Universal 3D File |
U3I | Miscellaneous Files | |
U3I | Text Files | |
U3P | Executable Files | U3 Smart Application |
U8 | Audio Files | 3D Lemmings Audio File |
UAS | Backup Files | |
UAX | Audio Files | Unreal Audio Package |
UB | Audio Files | Unsigned Byte Audio File |
UBJ | Data Files | Universal Binary JSON File |
UC | Game Files | UnrealScript Class |
UC2 | Archive Files | UltraCompressor 2 Archive |
uca | Miscellaneous Files | |
UCCAPILOG | Data Files | Microsoft UCC API Log File |
UCD | Miscellaneous Files | |
UCF | Settings Files | Epson personal settings information file |
UCF | Web Files | WebEx Media File |
UCI | Backup Files | UFS Explorer Backup File |
UCI | Miscellaneous Files | Samsung YP-P2 theme file |
UCM | Game Files | Crazy Machines Model File |
UCT | Settings Files | UC Browser Theme File |
UD | Data Files | OmniPage User Dictionary |
UDB | Database Files | Dynamics AX User Database File |
UDC | Miscellaneous Files | |
UDC | System Files | |
UDCX | Settings Files | Universal Data Connection File |
UDF | Disk Image Files | Universal Disk Format File |
UDF | Settings Files | Microsoft Excel user defined function file |
UDF | Programming Files | SQL user defined function script file |
UDF | Miscellaneous Files | X-ray Diffraction Data File Format |
UDK | Game Files | Unreal Engine Map File |
UDL | Database Files | Microsoft Universal Data Link File |
UDM | Game Files | MapView user module file |
UDM | Data Files | Moldflow format file |
UDS | Data Files | Uniform Data System File |
UDS | Miscellaneous Files | NetBackup UNIX Domain Socket File |
UDS | Data Files | Sierra Generations File |
UFA | Archive Files | UFA compressed archive |
UFO | Image Files | Ulead File Object |
UFO | Data Files | Ellisys Visual USB data file |
uha | Archive Files | UHARC compressed archive |
UI | Programming Files | User Interface File |
UI | Miscellaneous Files | Komodo GUI builder user interface file |
UI | Settings Files | Qt Project user interface file |
UI | Settings Files | Jabbim (Jabber client) file |
UI | Miscellaneous Files | UltraISO file |
UIBAK | Disk Image Files | UltraISO Backup Disk Image |
UID | Miscellaneous Files | IBM Voice Type Users file |
UIF | Disk Image Files | Universal Image Format Disc Image |
UIL | Image Files | |
UIL | Data Files | |
UIN | Miscellaneous Files | |
UIS | Settings Files | WindowBlinds User Interface Specification |
UKX | Game Files | Unreal Animation Package |
ULAW | Audio Files | Raw u-Law Audio File |
ULD | Miscellaneous Files | |
ULF | Data Files | Universal List File |
ULP | Miscellaneous Files | EAGLE Script file |
ULS | Miscellaneous Files | NetMeeting User Location Service File |
ULT | Audio Files | UltraTracker Module |
ULT | Data Files | |
ULW | Audio Files | u-Law Audio File |
ULZ | Data Files | USBlyzer Data Capture File |
UMF | Data Files | MediaHolder Universal Media Format File |
UML | Programming Files | UML Data Object Model |
UMLCLASS | Programming Files | UML Class Model |
UMOD | Game Files | Unreal Tournament Module File |
UMX | Game Files | Unreal Music Package |
UND | Settings Files | Urban Network Data file |
UNF | Miscellaneous Files | |
UNI | Audio Files | MikMod UniMOD Module |
UNI | Data Files | |
UNITY | Game Files | Unity Scene File |
UNITY3D | Game Files | Unity Web Player File |
UNITYPACKAGE | Data Files | Unity Package File |
UNK | Miscellaneous Files | Unknown File |
UNKNOWN | Miscellaneous Files | Unknown File Type |
UNL | Miscellaneous Files | Garmin Unlock File |
UNR | Game Files | Unreal Level Map |
UNT | CAD Files | AutoCAD Unit Definition File |
UNX | Text Files | |
uof | Miscellaneous Files | Uniform Office format (Unified Office Format) |
uop | Miscellaneous Files | |
uos | Miscellaneous Files | |
UOT | Text Files | Unified Office format text file |
UPD | Settings Files | ProUpdater Per/Directory options setting file |
UPD | Text Files | Program Update Information |
UPD | Miscellaneous Files | Ulead private data file |
UPDATE | Data Files | ISAPI Update File |
UPDATR | Game Files | iConomy Update File |
UPF | Image Files | Nokia Phone digital photo file |
UPF | Settings Files | MicroStation User Preferences File |
UPF | CAD Files | Unified Power Format File |
UPG | Miscellaneous Files | Upgrade File |
UPI | Raster Image Files | |
UPI | Plugin Files | |
UPK | Game Files | Unreal Engine 3 Package |
UPO | Miscellaneous Files | |
UPOI | Data Files | iGO Points of Interest File |
UPR | Data Files | FileMaker User Dictionary |
UPS | Data Files | Microsoft Works file |
UPX | Image Files | Ulead Photo Express saved image file. |
UPX | Executable Files | Ultimate Packer for eXecutables File |
UQM | Game Files | The Ur-Quan Masters Game Data File |
URL | Web Files | Internet Shortcut |
URR | Miscellaneous Files | Uniface Signatures File |
urt | Miscellaneous Files | |
USA | Game Files | Unreal Saved Game File |
USER | Settings Files | Visual Studio Project User Options File |
USERPROFILE | Settings Files | Norton Antivirus User Profile File |
USERTILE-MS | Raster Image Files | Windows 8 User Tile File |
USF | Settings Files | EVGA Precision X Skin File |
USF | Video Files | Universal Subtitles Format File |
USF | Audio Files | Nintendo 64 Music File |
USFLIB | Audio Files | Nintendo 64 Song Library |
USR | Data Files | User specific settings file |
USR | Database Files | FileMaker Pro Database File |
USR | Audio Files | Daqarta extended audio data |
USR | Game Files | Uplink computer game file |
USR | Miscellaneous Files | EAGLE User-specific parameter file |
USR | Miscellaneous Files | USRobotics firmware update file |
USTAR | Data Files | Uniform Standard Tape Archive Format File |
USX | Game Files | Unreal Static Meshes |
UT2 | Game Files | Unreal Tournament Map |
UT2MOD | Game Files | Unreal Tournament 2003/2004 Module File |
UT3 | Game Files | Unreal Tournament 3 Map File |
UT4MOD | Game Files | Unreal Tournament 2004 Module |
UTC | Game Files | Bioware Creature File |
UTF8 | Text Files | |
UTI | Archive Files | SafeGuard PrivateCrypto encrypted archive |
UTI | Settings Files | Spybot - Search & Destroy includes file |
UTI | Game Files | BioWare Aurora game engine item file |
UTW | Game Files | Unity Whirld File |
UTX | Game Files | Unreal Texture Package |
UTZ | Settings Files | UIQ Theme Package |
UU | Encrypted Files | Uuencoded File |
UUD | Encrypted Files | UUDecoded File |
UUE | Encrypted Files | |
UVF | Data Files | Uncertain Value Format |
UVX | Game Files | Unreal Tournament 2003 Saved Game |
UW | Audio Files | Unsigned Word Audio File |
UWF | Audio Files | UltraTracker Wave File |
UWL | Data Files | User Word List File |
UXX | Game Files | Unreal Tournament Cache |
UYVY | Raster Image Files | Imagemagick Perlmagick file |