| 0 |
.U3D file extension |
Universal 3D |
| 1 |
.UAX file extension |
Unreal Audio |
| 2 |
.UIF file extension |
MagicISO Universal Image Format |
| 3 |
.UPD file extension |
Update |
| 4 |
.UPG file extension |
Firmware Upgrade |
| 5 |
.USR file extension |
User Specific Settings |
| 6 |
.U file extension |
Subsampled Raw YUV Bitmap Image |
| 7 |
.U00 file extension |
Commodore C64 Universal |
| 8 |
.U01 file extension |
Barudan Embroidery |
| 9 |
.U08 file extension |
UFile Data |
| 10 |
.U10 file extension |
UFile 2010 Tax Return |
| 11 |
.U11 file extension |
UFile 2011 Tax Return |
| 12 |
.U12 file extension |
UFile 2012 Tax Return |
| 13 |
.U255LAW file extension |
Exponential 8-bit Sound |
| 14 |
.U2CAR file extension |
NFS:U2 Car |
| 15 |
.U32 file extension |
Authorware Cover |
| 16 |
.U3I file extension |
U3 Application Information |
| 17 |
.U3P file extension |
U3 Platform Install |
| 18 |
.U8 file extension |
Lemings 3D Audio |
| 19 |
.U96 file extension |
EasyZip Temporary |
| 20 |
.U98 file extension |
USA 98 Streets & Destinations Tour |
| 21 |
.UAE file extension |
WinUAE Configuration |
| 22 |
.UAL file extension |
Entrust Unattended Login Credentials |
| 23 |
.UAP file extension |
WAP User Agent Profile |
| 24 |
.UAQ file extension |
Microsoft Windows Action Queue |
| 25 |
.UAS file extension |
Ulead PhotoImpact Backup |
| 26 |
.UAV file extension |
OpenPilot UAV Settings |
| 27 |
.UB file extension |
8-bit Unsigned Byte RAW Data |
| 28 |
.UB1 file extension |
X-Driven DRS-1100 Recorded Video |
| 29 |
.UBB file extension |
BEA ELink Adapter Configuration |
| 30 |
.UBD file extension |
BASIC UBAS |
| 31 |
.UBF file extension |
MXT3010 Universal Boot Format |
| 32 |
.UBI file extension |
Ubisoft Logo Animation |
| 33 |
.UBIFS file extension |
Linux UBIFS Image |
| 34 |
.UBJ file extension |
Universal Binary JSON Fiile |
| 35 |
.UBK file extension |
Embiid Ebook |
| 36 |
.UBL file extension |
DM35x User Boot Loader |
| 37 |
.UBM file extension |
IPhoto Mtwain Install |
| 38 |
.UBOX file extension |
Universe Sandbox Saved Data |
| 39 |
.UBR file extension |
IIS WCAT Configuration |
| 40 |
.UBS file extension |
Tracesrv Bugslayer Utility |
| 41 |
.UC file extension |
UnrealScript Class |
| 42 |
.UC2 file extension |
UltraCompressor II Compressed Archive |
| 43 |
.UCCAPILOG file extension |
Microsoft Windows Live Messenger UCC API Log |
| 44 |
.UCD file extension |
Prosa Diagram |
| 45 |
.UCE file extension |
Microsoft Windows XP System32 |
| 46 |
.UCF file extension |
Epson Personal Settings Information |
| 47 |
.UCI file extension |
Samsung YP-P2 Theme |
| 48 |
.UCL file extension |
Unreal Tournament Cache |
| 49 |
.UCLS file extension |
ObjectAid UML Explorer Class Diagram |
| 50 |
.UCM file extension |
Urban Chaos Game File |
| 51 |
.UCN file extension |
U-Act Configurator Configuration Storage |
| 52 |
.UCP file extension |
Uniformity Correction Parameters |
| 53 |
.UCR file extension |
MicroSim PCBoard Unrouted Nets Report |
| 54 |
.UCS file extension |
Homeworld Localized Unicode Strings |
| 55 |
.UCSETTINGS file extension |
Universal Converter Settings |
| 56 |
.UCT file extension |
Ultrasound Computed Tomography |
| 57 |
.UCV file extension |
Universal Converter Conversion |
| 58 |
.UCX file extension |
Rational XDE |
| 59 |
.UD file extension |
OmniPage User Dictionary |
| 60 |
.UDA file extension |
ZEMAX Model Data |
| 61 |
.UDB file extension |
Microsoft Works |
| 62 |
.UDC file extension |
System Management Server |
| 63 |
.UDCX file extension |
Microsoft Office Universal Data Connection |
| 64 |
.UDEB file extension |
Debian Package |
| 65 |
.UDF file extension |
Windows NT Uniqueness Database |
| 66 |
.UDG file extension |
UDraw(Graph) |
| 67 |
.UDI file extension |
CorelDRAW Draw Script Textures Bitmap |
| 68 |
.UDID file extension |
Google Android Unique Device IDentifier |
| 69 |
.UDIF file extension |
Apple Mac OS X Universal Disk Image Format |
| 70 |
.UDK file extension |
Unreal Map |
| 71 |
.UDL file extension |
Microsoft Data Link |
| 72 |
.UDM file extension |
MapView User Module |
| 73 |
.UDO file extension |
Moray UDO 3D |
| 74 |
.UDP file extension |
Corel VideoStudio Scene Information |
| 75 |
.UDS file extension |
NHTSA UDS-1992 Crash Test Data |
| 76 |
.UDSTATE file extension |
Motorola Media Finder |
| 77 |
.UDT file extension |
User Defined Type Data Or VisiLogic Utilities |
| 78 |
.UDW file extension |
Raw Unsigned DoubleWord (32-bit) Data |
| 79 |
.UDX file extension |
PI Expert Design Software |
| 80 |
.UEA file extension |
Protector Suite QL |
| 81 |
.UEAF file extension |
Upek Protected Single |
| 82 |
.UEED file extension |
Uconomix Encryption Engine Encrypted Directory |
| 83 |
.UEM file extension |
LDC Region |
| 84 |
.UENC file extension |
UltraEdit Encrypted Text |
| 85 |
.UES file extension |
Ulead Photo Explorer Slide Show |
| 86 |
.UEW file extension |
UltraEdit Wordfile |
| 87 |
.UEZ file extension |
Ulead COOL 3D Graphics |
| 88 |
.UFA file extension |
GIF Animator Animation Object Information |
| 89 |
.UFC file extension |
SATURN Suite |
| 90 |
.UFDL file extension |
Universal Forms Description Language |
| 91 |
.UFDR file extension |
UFED Physical Analyzer Report Package |
| 92 |
.UFF file extension |
DataWave SciWorks Physiological Data |
| 93 |
.UFI file extension |
UFOCaptureV2 |
| 94 |
.UFM file extension |
Unicode TrueType Font |
| 95 |
.UFO file extension |
Ulead PhotoImpact Object |
| 96 |
.UFP file extension |
Ulead Photo Project |
| 97 |
.UFS file extension |
FreeBSD PC-BSD Unix File System |
| 98 |
.UFS.UZIP file extension |
FreeBSD Compressed Unix File System |
| 99 |
.UFX file extension |
Ultimate 3D Game Engine Material |
| 100 |
.UGD file extension |
Need For Speed Underground |
| 101 |
.UGF file extension |
Go Game |
| 102 |
.UGR file extension |
Apophysis Gradient |
| 103 |
.UGS file extension |
Unknown File Extension |
| 104 |
.UHA file extension |
UHARC Compressed Archive |
| 105 |
.UHH file extension |
Eurotherm Hydra History Encrypted |
| 106 |
.UHS file extension |
Universal Hint System Binary |
| 107 |
.UHTM file extension |
Unreal Tournament |
| 108 |
.UHTML file extension |
UHTML Document |
| 109 |
.UI file extension |
User Interface |
| 110 |
.UIBAK file extension |
UltraISO Backup Disk Image |
| 111 |
.UIC file extension |
COCO Unit ICon |
| 112 |
.UID file extension |
IBM Voice Type Users |
| 113 |
.UID-ZPS file extension |
Zoner Photo Studio Picture Autobackup |
| 114 |
.UIH file extension |
Geoworks UI Compiler Espire Header |
| 115 |
.UIL file extension |
IBM AIX User Interface Language |
| 116 |
.UIN file extension |
ICQ 2001 Saved ICQ Contact Information |
| 117 |
.UIR file extension |
LabWindows User Interface Resource |
| 118 |
.UIS file extension |
WindowBlinds Personality |
| 119 |
.UIT file extension |
UIX XML Template |
| 120 |
.UIX file extension |
UiXML Page |
| 121 |
.UIZ file extension |
Spybot Search & Destroy Updater |
| 122 |
.UK file extension |
English (British) Language Translation |
| 123 |
.UKA file extension |
Fifa World Cup Game Data |
| 124 |
.UKE file extension |
Ulead VideoStudio |
| 125 |
.UKO file extension |
UK Offshore Operators Association (OKOOA) P1/90 Data |
| 126 |
.UKS file extension |
Microsoft Works |
| 127 |
.UKX file extension |
Unreal Tournament Animation |
| 128 |
.UKY file extension |
UltraMixer Licence Key |
| 129 |
.ULAW file extension |
Raw CCITT/ITU G.711 US Telephony Audio Format |
| 130 |
.ULB file extension |
COBOL Unisys Library |
| 131 |
.ULD file extension |
Unified Luminaire Datafile |
| 132 |
.ULF file extension |
Universal List |
| 133 |
.ULG file extension |
ULG Bitmap |
| 134 |
.ULP file extension |
EAGLE Script |
| 135 |
.ULS file extension |
NetMeeting User Location Service |
| 136 |
.ULT file extension |
Ultratracker Music Module (MOD) |
| 137 |
.ULW file extension |
Raw CCITT/ITU G.711 US Telephony Audio Format |
| 138 |
.ULX file extension |
Glulx Data |
| 139 |
.ULYS file extension |
Ulysses Project |
| 140 |
.ULZ file extension |
USBlyzer Data Capture |
| 141 |
.UMB file extension |
MemMaker Backup |
| 142 |
.UMD file extension |
UMD Mobile Ebook |
| 143 |
.UMF file extension |
File Transport |
| 144 |
.UML file extension |
Visual UML Class Diagram & Model |
| 145 |
.UMLCLASS file extension |
Java UML Class Model |
| 146 |
.UMLX file extension |
Visual UML XML Model |
| 147 |
.UMM file extension |
Unified Molecular Modeling |
| 148 |
.UMOD file extension |
Unreal Tournament MOD Installation Package |
| 149 |
.UMP file extension |
UModel Project |
| 150 |
.UMR file extension |
MyEclipse UML Model Repository |
| 151 |
.UMV file extension |
Are You Afraid Of The Dark? Video |
| 152 |
.UMX file extension |
Unreal Tournament Music Package |
| 153 |
.UNA file extension |
SIMS Unauthorized Data |
| 154 |
.UNAUTH file extension |
SiteMinder Unauthorized Message |
| 155 |
.UNCOMPRESSED_SIZE file extension |
Singularity Game |
| 156 |
.UND file extension |
Urban Network Data |
| 157 |
.UNDEFINED file extension |
Undefined |
| 158 |
.UNDF file extension |
Undefined File Format |
| 159 |
.UNDO file extension |
Backup |
| 160 |
.UNF file extension |
Btreive Unformatted |
| 161 |
.UNI file extension |
Forecast Pro Data |
| 162 |
.UNIC file extension |
Unic Tracker Sound |
| 163 |
.UNITXT file extension |
YS FLIGHT Language |
| 164 |
.UNITY file extension |
Unity Scene |
| 165 |
.UNITY3D file extension |
Unity Scene Web Player |
| 166 |
.UNITYPACKAGE file extension |
Unity Package |
| 167 |
.UNITYPROJ file extension |
Unity 3D Project |
| 168 |
.UNIT_VARIANT file extension |
Total War Unit Variant Settings |
| 169 |
.UNIX file extension |
Unix |
| 170 |
.UNIXYZ file extension |
UniChem XYZ Chemical Modeller Input |
| 171 |
.UNK file extension |
UVProbe |
| 172 |
.UNKNOWN file extension |
Unknown File Extension |
| 173 |
.UNL file extension |
Garmin MapSource Unlock |
| 174 |
.UNQ file extension |
ACT! 3.0 Email Message Attachment |
| 175 |
.UNR file extension |
Unreal Map |
| 176 |
.UNS file extension |
Visual Navigation Suite Export Or Import Settings |
| 177 |
.UNT file extension |
AutoCAD Unit Definition |
| 178 |
.UNUSED file extension |
Photoline 4 Defaults |
| 179 |
.UNV file extension |
BusinessObjects Universe |
| 180 |
.UNX file extension |
Unix Text |
| 181 |
.UOF file extension |
Uniform Office Format |
| 182 |
.UOL file extension |
PhotoImpact Clipart Image |
| 183 |
.UOP file extension |
Unified Office Format Presentation |
| 184 |
.UOS file extension |
Unified Office Format Spreadsheet |
| 185 |
.UOT file extension |
Unified Office Format Text |
| 186 |
.UP2 file extension |
Ulead Cool 3D Plugins Board |
| 187 |
.UPA file extension |
Fake Download |
| 188 |
.UPB file extension |
Mvision Firmware Update |
| 189 |
.UPC file extension |
Ultimate Paint Component File Format |
| 190 |
.UPDATE file extension |
ISAPI Update |
| 191 |
.UPDF file extension |
UltraPdf Publication |
| 192 |
.UPF file extension |
Nokia Phone Digital Photo |
| 193 |
.UPI file extension |
Ulead PhotoImpact Plugin |
| 194 |
.UPJ file extension |
Ulead Project |
| 195 |
.UPK file extension |
Unreal 3 Game Data Package |
| 196 |
.UPK0 file extension |
Metro 2033 Game |
| 197 |
.UPL file extension |
StarMoney Agent Download |
| 198 |
.UPLOAD file extension |
Upload |
| 199 |
.UPM file extension |
PenMail |
| 200 |
.UPO file extension |
DBASE Compiled Update Data |
| 201 |
.UPOI file extension |
IGO Points Of Interest |
| 202 |
.UPP file extension |
Ghostscript Uniprint Unified Printer Parameter |
| 203 |
.UPR file extension |
FileMaker User Spelling Dictionary |
| 204 |
.UPS file extension |
Microsoft Works |
| 205 |
.UPT file extension |
Connectivity Memory Model Update Timing Input |
| 206 |
.UPX file extension |
Ulead Photo Express Saved Image |
| 207 |
.UPZ file extension |
StarMoney Agent Download |
| 208 |
.UQM file extension |
The Ur-Quan Masters Archive |
| 209 |
.URC file extension |
Unicenter Remote Control |
| 210 |
.URD file extension |
Uno Reflection Data |
| 211 |
.URD-JOURNAL file extension |
Ultra Recall Journal Update |
| 212 |
.URF file extension |
Radar ViewPoint Universal Radar Format |
| 213 |
.URI file extension |
List Of Uniform Resource Identifiers |
| 214 |
.URIS file extension |
Uniform Resource Identifiers |
| 215 |
.URL file extension |
Internet Shortcut - URL - Uniform Resource Locator |
| 216 |
.URLS file extension |
GetRight Internet Shortcuts List |
| 217 |
.URL_ file extension |
Internet Shortcut - URL - Uniform Resource Locator |
| 218 |
.URP file extension |
Universal Report |
| 219 |
.URQ file extension |
Review QuickChart Chart |
| 220 |
.URR file extension |
Uniface Signatures |
| 221 |
.URS file extension |
ControlDraw User Requirement Specifier |
| 222 |
.URT file extension |
Utah Run-Length Encoded Bitmap Image |
| 223 |
.US file extension |
English Language Translation |
| 224 |
.US? file extension |
Microsoft Word Font |
| 225 |
.USA file extension |
Microsoft Office Headers |
| 226 |
.USB file extension |
SiSoftware Sandra |
| 227 |
.USBSO file extension |
Teledyne LeCroy Protocol Analyzer Settings |
| 228 |
.USC file extension |
USC Module Definition |
| 229 |
.USD file extension |
Epson Print Image Frame |
| 230 |
.USDX file extension |
Tom Clancys Rainbow Six: Vegas Game |
| 231 |
.USECASEDIAGRAM file extension |
Microsoft Visual Studio Use Case Diagram |
| 232 |
.USEQ file extension |
USeq Genome Data |
| 233 |
.USER file extension |
Microsoft Visual Studio Project User Options |
| 234 |
.USERPROFILE file extension |
Symantec User Profile |
| 235 |
.USERSETTINGS file extension |
User Settings |
| 236 |
.USERTILE-MS file extension |
Microsoft Windows 8 Release Preview User Tile |
| 237 |
.USF file extension |
Core Media Player XML Universal Subtitle Format |
| 238 |
.USFLIB file extension |
Nintendo 64 Song Library |
| 239 |
.USG file extension |
PC-Doctor For Windows |
| 240 |
.USH file extension |
Creston SIMPL Windows |
| 241 |
.USI file extension |
UsiXML UI Description |
| 242 |
.USKN file extension |
KSDev ThemeEngine Theme |
| 243 |
.USL file extension |
LaserJet Landscape Font |
| 244 |
.USM file extension |
ScaleForm GFX Video |
| 245 |
.USP file extension |
PageMaker Printer Font |
| 246 |
.USRP file extension |
UTM Universe Polar Stereographic |
| 247 |
.USS file extension |
WinUAE Saved State |
| 248 |
.UST file extension |
WiFi SiStr Exported User Theme |
| 249 |
.USTAR file extension |
Uniform Standard Tape Archive Format |
| 250 |
.USV file extension |
LG Xenon Mobile Phone Contact List |
| 251 |
.USX file extension |
Unreal StaticMesh (hardware Brushes) |
| 252 |
.UT2 file extension |
Unreal Tournament Map |
| 253 |
.UT2MOD file extension |
Unreal Tournament 2003 MOD Installation Package |
| 254 |
.UT3 file extension |
Unreal Tournament 3 Map |
| 255 |
.UT4MOD file extension |
Unreal Tournament 2004 MOD Installation Package |
| 256 |
.UTB file extension |
µTBackup Backup |
| 257 |
.UTC file extension |
BioWare Aurora Game Engine Creature |
| 258 |
.UTD file extension |
BioWare Aurora Game Engine Door |
| 259 |
.UTE file extension |
BioWare Aurora Game Engine Encounter |
| 260 |
.UTF file extension |
AOL Updating Files |
| 261 |
.UTF8 file extension |
Unicode UTF-8 Encoded Text |
| 262 |
.UTI file extension |
Spybot - Search & Destroy Includes |
| 263 |
.UTL file extension |
QuickBooks Data |
| 264 |
.UTM file extension |
BioWare Aurora Game Engine Store |
| 265 |
.UTP file extension |
BioWare Aurora Game Engine Placeable Object |
| 266 |
.UTPART file extension |
µTorrent Unfinished Download |
| 267 |
.UTS file extension |
Spybot - Search & Destroy Include |
| 268 |
.UTT file extension |
BioWare Aurora Engine Trigger |
| 269 |
.UTW file extension |
BioWare Aurora Engine Waypoint |
| 270 |
.UTX file extension |
Unreal Texture |
| 271 |
.UTXT file extension |
Unicode Text |
| 272 |
.UTZ file extension |
Symbian OS User Interface Theme |
| 273 |
.UU file extension |
Uuencoded (compressed) File Archive (ascii) |
| 274 |
.UUD file extension |
UUDecoded |
| 275 |
.UUE file extension |
UUEncoded |
| 276 |
.UUS file extension |
Ultra Utility Skin |
| 277 |
.UV2 file extension |
Janes Combat Simulations: F-15 |
| 278 |
.UVCAB file extension |
UVScreenCamera Films |
| 279 |
.UVF file extension |
UVScreenCamera Films |
| 280 |
.UVNTS file extension |
UVScreenCamera Notes |
| 281 |
.UVO file extension |
Sanyo Katana DLX Voice Memo |
| 282 |
.UVP file extension |
Ulead MediaStudio |
| 283 |
.UVPROJ file extension |
µVision4 Project |
| 284 |
.UVR file extension |
UVR Mesh |
| 285 |
.UVS file extension |
UVScreenCamera Segments |
| 286 |
.UVSEG file extension |
UVScreenCamera Segments |
| 287 |
.UVW file extension |
3D Studio MAX UVW Coordinates |
| 288 |
.UVX file extension |
Unreal Tournament Saved Game |
| 289 |
.UW file extension |
Unsigned Word (16-bit) Music |
| 290 |
.UWF file extension |
UltraTracker WaveSample Music |
| 291 |
.UWL file extension |
Novell GroupWise User Word List |
| 292 |
.UXDC file extension |
Microsoft Excel Data Retrieval Service Connection |
| 293 |
.UXF file extension |
UMLet UML EXchange Format |
| 294 |
.UXX file extension |
Unreal Tournament 2003 Cache |
| 295 |
.UXY file extension |
Barudan Embroidery Outline |
| 296 |
.UXZ file extension |
IBM Flex CMM Update |
| 297 |
.UYVY file extension |
YUV 16-bit Image Format |
| 298 |
.UZ2 file extension |
Unreal Tournament Compressed |
| 299 |
.UZE file extension |
UltimateZip Compressed Archive |
| 300 |
.UZIP file extension |
FreeBSD Compressed Disk Image |
| 301 |
.UZY file extension |
Backdoor.Sokacaps |
