File Formats That Start with the Letter U

Explore a complete list of file formats that begin with the letter U, powered by the FileProInfo file type database. View file extensions, software compatibility, and metadata—and access 100% free online tools to convert, view, edit, compare, and manage your files instantly.

File Extension File Type Free Apps
.U AU Audio File Free Online .U File Apps
.U Subsampled Raw YUV Image Free Online .U File Apps
.U Unreal Tournament Class Package Free Online .U File Apps
.U10 UFile 2010 Tax Return Free Online .U10 File Apps
.U11 UFile 2011 Tax Return Free Online .U11 File Apps
.U12 UFile 2012 Tax Return Free Online .U12 File Apps
.U3D Universal 3D File Free Online .U3D File Apps
.U3I U3 Application Information File Free Online .U3I File Apps
.U3P U3 Smart Application Free Online .U3P File Apps
.U8 Mario Kart Wii Archive Free Online .U8 File Apps
.U8 3D Lemmings Audio File Free Online .U8 File Apps
.UASSET Unreal Asset File Free Online .UASSET File Apps
.UAX Unreal Audio Package Free Online .UAX File Apps
.UB Unsigned Byte Audio File Free Online .UB File Apps
.UBJ Universal Binary JSON File Free Online .UBJ File Apps
.UBOX Universe Sandbox Data File Free Online .UBOX File Apps
.UC UnrealScript Class Free Online .UC File Apps
.UC2 UltraCompressor 2 Archive Free Online .UC2 File Apps
.UCCAPILOG Microsoft UCC API Log File Free Online .UCCAPILOG File Apps
.UCE Windows UCE System File Free Online .UCE File Apps
.UCF WebEx Media File Free Online .UCF File Apps
.UCI UFS Explorer Backup File Free Online .UCI File Apps
.UCL Killing Floor System File Free Online .UCL File Apps
.UCM Crazy Machines Model File Free Online .UCM File Apps
.UCT UC Browser Theme File Free Online .UCT File Apps
.UD OmniPage User Dictionary Free Online .UD File Apps
.UDB Dynamics AX User Database File Free Online .UDB File Apps
.UDC Adobe InDesign User Dictionary Free Online .UDC File Apps
.UDCX Universal Data Connection File Free Online .UDCX File Apps
.UDEB Debian Package File Free Online .UDEB File Apps
.UDF Excel User Defined Function Free Online .UDF File Apps
.UDF Universal Disk Format File Free Online .UDF File Apps
.UDK Unreal Engine Map File Free Online .UDK File Apps
.UDL Microsoft Universal Data Link File Free Online .UDL File Apps
.UDS NetBackup UNIX Domain Socket File Free Online .UDS File Apps
.UDS Sierra Generations File Free Online .UDS File Apps
.UDS Uniform Data System File Free Online .UDS File Apps
.UEA Protector Suite QL Encrypted Archive Free Online .UEA File Apps
.UFD Universal Forms Description Language Free Online .UFD File Apps
.UFO Ulead File Object Free Online .UFO File Apps
.UFO Unified Font Object File Free Online .UFO File Apps
.UFR Upfiring File Free Online .UFR File Apps
.UFR Ultra Fractal File Free Online .UFR File Apps
.UFS FreeBSD Unix File System File Free Online .UFS File Apps
.UFS.UZIP Compressed Unix File System File Free Online .UFS.UZIP File Apps
.UFT Torque Font Cache File Free Online .UFT File Apps
.UGA Ulead GIF Animator File Free Online .UGA File Apps
.UGOIRA Ugoira Animated Image File Free Online .UGOIRA File Apps
.UGR Apophysis Ultra Fractal Gradient File Free Online .UGR File Apps
.UHA UHarc Compressed Archive Free Online .UHA File Apps
.UHTML UC Browser Saved Webpage Free Online .UHTML File Apps
.UI User Interface File Free Online .UI File Apps
.UIBAK UltraISO Backup Disk Image Free Online .UIBAK File Apps
.UIF Universal Image Format Disc Image Free Online .UIF File Apps
.UIS WindowBlinds User Interface Specification Free Online .UIS File Apps
.UKX Unreal Animation Package Free Online .UKX File Apps
.ULAW Raw u-Law Audio File Free Online .ULAW File Apps
.ULD Unified Luminaire Data File Free Online .ULD File Apps
.ULF Universal List File Free Online .ULF File Apps
.ULP EAGLE User Language Program Free Online .ULP File Apps
.ULS NetMeeting User Location Service File Free Online .ULS File Apps
.ULT UltraTracker Module Free Online .ULT File Apps
.ULW u-Law Audio File Free Online .ULW File Apps
.ULX Glulx Game File Free Online .ULX File Apps
.ULZ USBlyzer Data Capture File Free Online .ULZ File Apps
.UMAP Unreal Engine Map File Free Online .UMAP File Apps
.UMD Splinter Cell Blacklist Game Data File Free Online .UMD File Apps
.UMF MediaHolder Universal Media Format File Free Online .UMF File Apps
.UMJ UMAJIN Free Online .UMJ File Apps
.UML UML Data Object Model Free Online .UML File Apps
.UMLCLASS UML Class Model Free Online .UMLCLASS File Apps
.UMOD Unreal Tournament Module File Free Online .UMOD File Apps
.UMS Rune 3D Mesh File Free Online .UMS File Apps
.UMX Unreal Music Package Free Online .UMX File Apps
.UNAUTH SiteMinder Unauthorized Message File Free Online .UNAUTH File Apps
.UNF UNIF ROM File Free Online .UNF File Apps
.UNI MikMod UniMOD Module Free Online .UNI File Apps
.UNIF UNIF ROM File Free Online .UNIF File Apps
.UNITY Unity Scene File Free Online .UNITY File Apps
.UNITY3D Unity Web Player Archive Free Online .UNITY3D File Apps
.UNITYPACKAGE Unity Package File Free Online .UNITYPACKAGE File Apps
.UNITYPROJ Unity 3D Project Free Online .UNITYPROJ File Apps
.UNITYWEB Unity 3d Free Online .UNITYWEB File Apps
.UNK Unknown File Free Online .UNK File Apps
.UNKNOWN Unknown File Type Free Online .UNKNOWN File Apps
.UNL Garmin Unlock File Free Online .UNL File Apps
.UNR Unreal Level Map Free Online .UNR File Apps
.UNT AutoCAD Unit Definition File Free Online .UNT File Apps
.UNX Unix Text File Free Online .UNX File Apps
.UOF Uniform Office Document Free Online .UOF File Apps
.UOML Unique Object Markup Language Free Online .UOML File Apps
.UOP Ultima Online Patch File Free Online .UOP File Apps
.UOP Uniform Office Presentation Free Online .UOP File Apps
.UOS Uniform Office Spreadsheet Free Online .UOS File Apps
.UOT Uniform Office Document Free Online .UOT File Apps
.UPD Program Update Information Free Online .UPD File Apps
.UPDATE ISAPI Update File Free Online .UPDATE File Apps
.UPDATR iConomy Update File Free Online .UPDATR File Apps
.UPF MicroStation User Preferences File Free Online .UPF File Apps
.UPF Panono Unstitched Panorama Format Free Online .UPF File Apps
.UPF Unified Power Format File Free Online .UPF File Apps
.UPG Upgrade File Free Online .UPG File Apps
.UPK Unreal Engine 3 Package Free Online .UPK File Apps
.UPOI iGO Points of Interest File Free Online .UPOI File Apps
.UPR FileMaker User Dictionary Free Online .UPR File Apps
.UPR Fractal Parameters File Free Online .UPR File Apps
.UPS UPS Patch File Free Online .UPS File Apps
.UPX Ultimate Packer for eXecutables File Free Online .UPX File Apps
.UQM The Ur-Quan Masters Game Data File Free Online .UQM File Apps
.URI URI Resolution Services Free Online .URI File Apps
.URL Internet Shortcut Free Online .URL File Apps
.URR Uniface Signatures File Free Online .URR File Apps
.URT Utah Raster Toolkit File Free Online .URT File Apps
.USA Unreal Saved Game File Free Online .USA File Apps
.USD Universal Scene Description Format Free Online .USD File Apps
.USDZ Universal Scene Description Zipped Format Free Online .USDZ File Apps
.USEQ USeq Genome Data File Free Online .USEQ File Apps
.USER Visual Studio Project User Options File Free Online .USER File Apps
.USERPROFILE Norton AntiVirus User Profile File Free Online .USERPROFILE File Apps
.USERTILE-MS Windows 8 User Tile File Free Online .USERTILE-MS File Apps
.USF EVGA Precision X Skin File Free Online .USF File Apps
.USF Nintendo 64 Music File Free Online .USF File Apps
.USF Universal Subtitles Format File Free Online .USF File Apps
.USFLIB Nintendo 64 Song Library Free Online .USFLIB File Apps
.USM USM Game Video File Free Online .USM File Apps
.USR SmartMusic Custom File Free Online .USR File Apps
.USR FileMaker Pro Database File Free Online .USR File Apps
.USR Lowrance GPS Data File Free Online .USR File Apps
.UST UTAU Sequence Text File Free Online .UST File Apps
.USTAR Uniform Standard Tape Archive Format File Free Online .USTAR File Apps
.USX Unreal Static Meshes Free Online .USX File Apps
.UT2 Unreal Tournament Map Free Online .UT2 File Apps
.UT2MOD Unreal Tournament 2003/2004 Module File Free Online .UT2MOD File Apps
.UT3 Unreal Tournament 3 Map File Free Online .UT3 File Apps
.UT4MOD Unreal Tournament 2004 Module Free Online .UT4MOD File Apps
.UT8 Ghost Master Language File Free Online .UT8 File Apps
.UTC Bioware Creature File Free Online .UTC File Apps
.UTF8 Unicode UTF8-Encoded Text Document Free Online .UTF8 File Apps
.UTW Unity Whirld File Free Online .UTW File Apps
.UTX Unreal Texture Package Free Online .UTX File Apps
.UTXT Unicode Text File Free Online .UTXT File Apps
.UTZ UIQ Theme Package Free Online .UTZ File Apps
.UU Uuencoded File Free Online .UU File Apps
.UUD UUDecoded File Free Online .UUD File Apps
.UUE Uuencoded File Free Online .UUE File Apps
.UVA DECE Audio Free Online .UVA File Apps
.UVF Uncertain Value Format Free Online .UVF File Apps
.UVH DECE High Definition Video Free Online .UVH File Apps
.UVI DECE Graphic Free Online .UVI File Apps
.UVM DECE Mobile Video Free Online .UVM File Apps
.UVP DECE PD Video Free Online .UVP File Apps
.UVS DECE SD Video Free Online .UVS File Apps
.UVU DECE MP4 Free Online .UVU File Apps
.UVV DECE Video Free Online .UVV File Apps
.UVW UVW Coordinates File Free Online .UVW File Apps
.UVX Unreal Tournament 2003 Saved Game Free Online .UVX File Apps
.UW Unsigned Word Audio File Free Online .UW File Apps
.UWF UltraTracker Wave File Free Online .UWF File Apps
.UWL User Word List File Free Online .UWL File Apps
.UWRF Universal Web Radio File Free Online .UWRF File Apps
.UXF UML eXchange Format Free Online .UXF File Apps
.UXX Unreal Tournament Cache Free Online .UXX File Apps
.UZIP FreeBSD Compressed Disk Image Free Online .UZIP File Apps
Extension File Type Free Apps
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