File Extension Types that start with 'U'
UIF - MagicISO Universal Image FormatUNKNOWN - An unknown file extension
U - Nitpicker Ipflow
U - Subsampled Raw YUV Bitmap
U - Unknown Apple II
U - Unreal System
U - Unreal Tournament 2003 System
U2 - Telelogic Tau UML Model
U2E - Unreal Game Translation
U2P - Telelogic Tau UML Program Text
U3D - Universal 3D
U3P - U3 Platform Install
U4A - UnInstaller Archive
U8 - Raw Unsigned 8 - Bit Audio Data
U96 - EasyZip Temporary
U98 - Urdu 98 Document
UAE - WinUAE 0.8.22 Game Configuration
UAP - User Agent Wireless Telephony Profile
UAS - PhotoImpact Backup / Recovery
UAX - Deus Ex
UAX - Harry Potter
UAX - Rune
UAX - Undying
UAX - Unified Application eXchange Format
UAX - Unreal / Unreal 2
UAX - Unreal Audio
UAX - Unreal Tournament 2003 Sound
UB - Audio
UB - Raw Unsigned Byte (8 - bit) Data
UBB - BASIC UBAS
UBD - BASIC UBAS
UBK - Embiid Reader eBook
UBK - National Construction Estimator 32 User Costbook
UBM - Iphoto Mtwain Install
UBS - Tracesrv Bugslayer Utility
UC - AutoCut Flash Firmware
UC - Unreal Tournament Code
UC2 - UltraCompressor II Compressed Archive
UCD - Prosa / OM Use Case Diagram
UCE - UniCode Extensions
UCF - Epson Personal Settings Information
UCF - Xilinx Foundation User Constraint
UCG - ULEAD MediaStudio CG Infinity Graphic
UCM - Urban Chaos Game
UCMN - Unknown Apple II
UCN - Compressed Archive
UCN - U - Act Configurator Configuration Storage
UCS - Homeworld Localized Unicode Strings
UCS - Universal Classification Standard Database
UCX - Rational XDE
UD - AOL 4.0
UD - OmniPage User Dictionary
UDB - PINO 3 - Server
UDB - Windows2000 Uniqueness Database
UDB - Works
UDC - Acrobat Spelling
UDC - Fh5 US English
UDC - Systems Management Server (SMS) Collection Evaluator Updates Collection
UDD - OllyDbg Module Information
UDF - Excel User Defined Function
UDF - Photostyler Image Filter
UDF - Windows NT Uniqueness Database
UDF - X - ray Diffraction Data File Format
UDI - Corel Graphics Ver 10 Draw Script Textures Bitmap
UDI - Dazzle DVD Complete
UDM - MapView User - Defined Module
UDS - FIMware Database
UDS - Sierra Generations Geneology Family
UDW - Raw Unsigned DoubleWord (32 - bit) Data
UE2 - Encrypted Archive
UEF - Unified Emulator Format
UEZ - COOL 3D
UFA - GIF Animator Animation Object Information
UFA - UFA Compressed File Archive
UFF - DataWave Physiological Data
UFI - UFOCaptureV2 Presets
UFO - Ellisys Visual USB Data
UFO - PhotoImpact Graphic
UFO - Total Annihilation Third - party Unit
UFSD - UFS Explorer Professional Recovery RAW Recovery Signatures Database
UG - Drawing
UGA - Ulead GIF Animator Project
UH - Age of Kings
UHA - UHARC Compressed Archive
UHS - Universal Hint System
UHTM - Unreal Tournament
UI - Geoworks UI Compiler Espire Source
UI - User Interface
UID - IBM Voice Type Users
UIH - Geoworks UI Compiler Espire Header
UIL - X - Motif UIL Table
UIN - ICQ 2001+ Saved ICQ Contact Information
UIR - LabWindows User Interface Resource
UIS - WindowBlinds Skin
UK_ - Mcguiness
UKA - Fifa World Cup Game Data fe Art Legalscr
UKA - UKA Data Archive
UKS - Works
UKX - Unreal Tournament 2003 Animation
UL - uLAW Audio
ULD - Procomm Uploaded Files
ULF - Uniware Layout
ULP - EAGLE Layout Editor Script
ULP - Peugeot Diag 2000
ULT - UltraTracker Music Module
ULW - ULAW - Sun / NeXT
ULX - CLAN Lexical
ULX - Glulx Game
UM - The Land Of UM World
UM - Unknown Apple II
UMB - MemMaker Backup Archive
UMD - UMD Photobook
UMI - CDDB Database and PC Music Library in PlayCenter
UML - Visual UML Class Diagram & Model
UMOD - Unreal Self - extracting MOD
UMOD - Unreal Tournament
UMS - Rune
UMX - Deus Ex
UMX - Harry Potter
UMX - U - MYX Player Song Mix Data and Timing Info
UMX - Unreal / Unreal Tournament Music
UMX - Unreal Tournament 2003 Music
UN_ - Ntgraph Setup30
UNASSIGNED - Unknown Apple II
UNCIAL - Unknown Apple II
UND - A86 Assembler Undefined Symbols
UNF - Btreive Unformatted
UNI - Forcast Pro Data
UNI - MikMod (UniMod) Format
UNION - Unknown Apple II
UNIVERSAL3 - Unknown Apple II
UNIX - UNIX
UNIX - Unknown Apple II
UNL - Informix Binary File Created by UNLOAD Command
UNLOCK - Unknown Apple II
UNM - XMap Flight Plan or Flight Plan Statistic
UNPAC - Unknown Apple II
UNPACK - Unknown Apple II
UNQ - ACT! Saved Unknown Attachment
UNQ - Fax View
UNR - Unreal Map
UNS - Visual Navigation Suite Export / Import Settings
UNT - AutoCAD Unit Definition
UNUSED - Photoline4 Defaults
UNV - BusinessObjects / WebIntelligence Universe
UNV - Forecast Pro Univariate Forecast
UNV - SDRC I - DEAS
UNX - Text
UNX - Unknown Apple II
UOL - PhotoImpact Object Library
UP - Unknown Apple II
UP2 - Cool3d Plug - ins Board
UPC - Ultimate Paint
UPCASE - Unknown Apple II
UPD - dBASE Update
UPD - ProUpdater Per / Directory Options Setting
UPD - Universal Print Driver
UPD - Unknown Apple II
UPD - Updated Program Data
UPD - VideoStudio Scene Information
UPDATE - ISAPI Loader New ISAPI Application
UPDATE - Program or Data File Update
UPDATE - Unknown Apple II
UPDATEALL - Unknown Apple II
UPDATEINFO - Unknown Apple II
UPDATES - Unknown Apple II
UPDF - UltraPdf Publication
UPF - Nokia Phone Digital Photo
UPF - Universal Picture Format Bitmap
UPG - Firmware Upgrade
UPG - Grafik Anim
UPI - Iphoto4 Programs Plug - in
UPI - ULead Photo Impact Program
UPJ - ULead Project
UPL - Starmoney Agent Download
UPL - Unknown Apple II
UPM - PenMail Document
UPO - dBASE Compiled Update
UPR - FileMaker User Spelling Dictionary
UPS - Works
UPT - Connectivity Memory Model Update Timing Input
UPX - ULead Photo Express Saved Image
UPZ - Starmoney Agent Download
UQM - The Ur - Quan Masters Archive
URBS - Unknown Apple II
URD - Ultra Recall Database
URD-JOURNAL - Ultra Recall Journal Update
URF - AppFace Skin
URF - ProWORX Nxt User Configurable Register Editor
URF - Radar ViewPoint Universal Radar Format
URI - List of Uniform Resource Identifiers
URIS - List of Uniform Resource Identifiers
URL - Internet Location
URLS - GetRight URL List
URS - ControlDraw User Requirements Specifier
URT - Utah Raster Image
US - Unknown Apple II
USA - Office Header
USA - Unreal Saved Game
USAGE - Snort
USAGE - Unknown Apple II
USB - D - Link FM Radio Update
USB - Syssoft Sandra
USB - USB Protocol Analyzer Trace
USE - Log
USE - MKS Source Integrity
USE - Unknown Apple II
USER - Unknown Apple II
USERPROFILE - Live Update User Profile
USF - Core Media Player XML Universal Subtitle Format
USF - Nintendo Ultra 64 Sound Format
USI - Unknown Apple II
USI - UsiXML UI Description
USL - LaserJet Landscape Font
USL - PC - Bibliothek User Dictionary
USL - ProWORX Nxt USL Loadables
USP - LaserJet Portrait Font
USP - PageMaker Printer Font
USP - SIMCA - P / SIMCA-P+ Project
USR - ERGO Receiver Configuration
USR - FileMaker Pro Runtime Engine Database Application
USR - MicroImages User - specific Information
USR - Pegasus Mail User Information
USR - Photo Paint User Defined Filter
USR - Unknown Apple II
USR - Uplink Player Information
USR - User Database
USS - PhotoImpact Exported Slicing Pattern
USS - WinUAE Saved State
UST - WiFi SiStr Exported User Theme
USTAR - POSIX tar Compressed Archive
USX - Unreal Tournament 2003 Static Mesh
USYM - Unknown Apple II
USZ - UsiXML UI Description
UT2 - Unreal Tournament Map
UT2MOD - Unreal Tournament 2003 Game Modification
UT4MOD - Unreal Tournament 2004 MOD Installation Package
UTC - BioWare Aurora Engine Creature
UTD - BioWare Aurora Engine Doors
UTE - BioWare Aurora Engine Encounter
UTE - Rukus 110
UTF - AOL Updating Files
UTI - BioWare Aurora Engine Item
UTI - SafeGuard PrivateCrypto Encrypted Archive
UTI - Spybot - Search & Destroy Usage Tracking
UTIL - Unknown Apple II
UTIL2 - Unknown Apple II
UTILITIES - Unknown Apple II
UTILITY - Unknown Apple II
UTILS - Unknown Apple II
UTL - QuickBooks Data
UTL - Sound
UTM - BioWare Aurora Engine Store
UTMP - Unknown Apple II
UTP - BinPatch Patch Data
UTP - BioWare Aurora Engine Placeable Object
UTS - BioWare Aurora Engine Sound
UTS - Spybot - Search & Destroy Include
UTT - BioWare Aurora Engine Trigger
UTW - BioWare Aurora Engine Waypoint
UTX - Deus Ex
UTX - Harry Potter
UTX - Rune
UTX - Undying
UTX - Unicode
UTX - Unreal / Unreal 2
UTX - Unreal Tournament 2003 Texture
UU - Compressed Archive
UUCP - Unknown Apple II
UUD - Uudecoded
UUE - Unknown Apple II
UUE - Uuencoded
UUT - Genesis 2000
UV - EA Games Video
UV2 - Jane's Combat Simulations F - 15
UVP - ULEAD MediaStudio Video Paint Graphic
UVR - Ulead Cool 360 Viewer
UVV - Listlabl
UVW - geoManager / geoInterface User View
UVX - Unreal Tournament 2003 Saved Game
UW - Audio
UW - Raw Unsigned Word (16 - bit) Data
UW - Unitype GlobalWriter
UWF - UltraTracker Wave
UWL - GroupWise User Word List
UWL - WordPerfect User Word List
UWS - UniTrader 2006 Website Archive
UWT - UniTrader Template Archive
UX - UNIX
UXD - URLBase URL Database
UXP - URLBase URL Database (v. 5.1)
UXX - Unreal Tournament 2003 Cache
UXY - Orchida Embroidery System
UYVY - ImageMagick Ver. 5.3.2 Perlmagick
UYVY - Interleaved YUV Raw Image
UZ - Unreal Tournament Server
UZE - Ultimate Zip Compresion Agent
UZR - UZR 3D Streamable 3D File Format
fileextensiontype.com