U
- .U - Bitmap image
- .U3D - Universal 3D File
- .U3I - U3 Application Information File
- .U3P - U3 Smart Application
- .U4A - UnInstaller Archive
- .U8 - Raw Unsigned 8-Bit Audio Data
- .U96 - EasyZip Temporary File
- .UAP - User agent profile
- .UAX - Unreal Audio File
- .UB - Raw unsigned byte
- .UBB - Basic Ubas file
- .UBD - Basic Ubas file
- .UBI - Animation UBISOFT
- .UBM - Iphoto Mtwain Install file
- .UBS - Tracesrv etc Bugslayer util file
- .UC - UnrealScript Class
- .UC0 - Archive UC
- .UC2 - Compressed Archive File
- .UCD - Prosa/ OM Use Case Diagram
- .UCE - WINXP SYSTEM32 file
- .UCI - UFS Explorer Backup File
- .UCN - Ultra-Compressor II Archive
- .UCR - Pixel image file
- .UD - AOL v4.0 file
- .UDB - Microsoft Works File
- .UDC - Acrobat Spelling File
- .UDF - Microsoft Excel User Defined Function
- .UDI - Corel Graphics10 Draw Skripts textures Bitmap file
- .UDL - MS Data Link
- .UDO - 3D Graphic
- .UDOG - Apple Browser Launcher
- .UDP - User Datagram Protocol
- .UDW - Raw unsigned doubleword
- .UE2 - Encrypted archive
- .UFA - UFA compressed file archive
- .UFO - Ulead File for Objects
- .UG - Drawing file
- .UGA - Project File
- .UGBT - Users & Groups
- .UH - Age Of Empires - Age of Kings
- .UHA - Compressed Multimedia Archive (UHarc) File
- .UHS - Binary file
- .UI - User Interface
- .UIBAK - UltraISO Backup Disk Image
- .UIF - Long prompts for Microsoft Windows
- .UIF - MagicISO Universal Image Format File
- .UIH - Espire header file
- .UIL - Bitmap image (X-Motif UIL icon file)
- .UIN - ICQ user
- .UIS - WindowBlinds Skin
- .UIS - Skin File
- .UK - TAGCASE0 html folder file
- .UKS - Microsoft Works File
- .UK_ - McGuiness file
- .UL - Audio file
- .ULAW - Audio (CCITT G.711)
- .ULD - Uploaded file information
- .ULF - Universal List File
- .ULS - User Location Service
- .ULT - Music module
- .ULW - Raw µ-Law Audio File
- .ULZ - USBlyzer Data Capture File
- .UMB - Backup File
- .UMOD - Unreal Self-extracting MOD File
- .UMX - Unreal Game Data File
- .UNAUTH - SiteMinder Unauthorized Message File
- .UND - A86 UNDefined symbols
- .UNI - UniMod music module
- .UNI - Datafile
- .UNIC - Unic Tracker v1/v2 formats (music/sound)
- .UNIX - Text File
- .UNIXYZ - UniChem chemical modeller output file
- .UNIXYZ - UniChem XYZ chemical modeller input file
- .UNQ - ACT! 3.0 Email message attachment
- .UNR - Unreal Game Data File
- .UNUSED - Photoline4 Defaults file
- .UNV - SDRC I-DEAS file
- .UNX - Text File
- .UN_ - Ntgraph Setup30 file
- .UOL - PhotoImpact Object Library File
- .UOP - Ultima Online Patch File
- .UP2 - Ulead COOL 3D Plugins Board File
- .UPA - Universal Programmer Analyser File
- .UPC - Ultimate Paint component
- .UPD - Updated Program Data
- .UPD - dBase Update File
- .UPD - Universal Print Driver
- .UPF - Bitmap image (Universal Picture Format)
- .UPG - Grafik Anim file
- .UPI - Program file
- .UPJ - ULead Project File
- .UPL - Starmoney Agent Download file
- .UPO - dBase Compiled Update File
- .UPR - Claris user dictionary
- .UPS - Microsoft Works File
- .UPX - Saved Image file
- .UPZ - Starmoney Agent Download file
- .URF - Universal radar format
- .URF - Skin File
- .URI - List of Uniform Resource Identifiers (WWW)
- .URIS - List of Uniform Resource Identifiers (WWW)
- .URL - Internet Shortcut
- .URLS - Universal Resource Locator
- .URL_ - Web Site Address-in Fiurl
- .URT - Utah Raster Toolkit File
- .US? - MS Word for DOS/WordPerfect Font
- .USA - Microsoft Office Headers file
- .USAGE - Snort file
- .USB - Syssoft Sandra file
- .USE - Source Integrity file
- .USERPROFILE - Symantec Shared file
- .USF - Nintendo 64 Music File
- .USFLIB - Nintendo 64 Song Library
- .USL - LaserJet Landscape Font
- .USM - Unsigned Sample Module data Farandole
- .USP - Printer font w/updated USACII extended characters
- .USR - Audit trail file
- .USR - User database file
- .USRP - UTM/Universe Polar Stereographic
- .USTAR - POSIX tar compressed archive
- .USX - Unreal Static Meshes
- .UT2 - Unreal Tournament Map
- .UTBL - Text Encoding
- .UTC - Bioware Creature File
- .UTE - Rukus 110 file
- .UTF8 - Unicode UTF8-Encoded Text
- .UTI - Encrypted File
- .UTI - SpyBot Search & Destroy File
- .UTL - QuickBooks data
- .UTP - BinPatch Patch Data File
- .UTS - SpyBot Search & Destroy File
- .UTX - Unreal Texture File
- .UTXT - Unicode Text File
- .UU - Compressed Archive File
- .UUD - UU-decoded file
- .UUE - UU-encoded file
- .UVF - Uncertain Value Format
- .UVR - Ulead Cool 360 Viewer File
- .UVV - Listlabl file
- .UW - Raw unsigned 16-bit datafile
- .UWF - Wave file
- .UWL - WordPerfect User Word List
- .UX - Unix file
- .UXX - Unreal Tournament Cache
- .UYVY - YUV 16Bits image format
- .UYVY - ImageMagick 5.3.2 Perlmagick file
146 file extensions found.
