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File extensions in alphabetical order #ABCDEFGHIJKLMNOPQRSTUVWXYZ

Browse extensions - U

    File extensions starting with a letter U

Browse extensions - U

# File extension Developer
0 .U - Subsampled Raw YUV Bitmap Image Epic Games
1 .U00 - The Price Is Right 2010 Game Ludia Inc.
2 .U01 - Barudan Embroidery Barudan
3 .U08 - UFile Data Dr Tax Software
4 .U10 - UFile 2010 Tax Return Format Dr Tax Software
5 .U11 - UFile 2011 Tax Return Format Dr Tax Software
6 .U12 - UFile 2012 Tax Return Format Dr Tax Software
7 .U255LAW - Exponential 8-bit Sound N/A
8 .U2CAR - NFS:U2 Car N/A
9 .U32 - Authorware Cover Adobe Systems Incorporated
10 .U3D - Universal 3D Format 3D Industry Forum
11 .U3I - U3 Application Information Format N/A
12 .U3P - U3 Platform Install Format SanDisk
13 .U8 - Lemings 3D Audio Format Clockwork Games
14 .U96 - EasyZip Temporary ConeXware, Inc.
15 .UAE - WinUAE Configuration N/A
16 .UAL - Entrust Unattended Login Credentials Entrust
17 .UAP - SIMATIC WinCC User Archive Export Siemens AG
18 .UAQ - Microsoft Windows Action Queue Microsoft Corporation
19 .UAS - Ulead PhotoImpact Backup Ulead Systems
20 .UAV - OpenPilot UAV Settings OpenPilot Foundation
21 .UAX - Unreal Audio Format Epic Games
22 .UB - Unsigned Byte Audio Format N/A
23 .UBIFS - Linux UBIFS Image N/A
24 .UBJ - Universal Binary JSON Fiile The Buzz Media
25 .UBM - IPhoto Mtwain Install N/A
26 .UBOX - Universe Sandbox Saved Data Format Universe Sandbox
27 .UBR - IIS WCAT Configuration Microsoft Corporation
28 .UC - UnrealScript Class N/A
29 .UC2 - UltraCompressor II Compressed Archive Format N/A
30 .UCCAPILOG - Microsoft Windows Live Messenger UCC API Log Format Microsoft
31 .UCD - Prosa Diagram Insoft Oy.
32 .UCE - Microsoft Windows XP System32 Format Microsoft
33 .UCF - WebEx Universal Communications Format Cisco Systems
34 .UCI - UFS Explorer Backup Format SysDevSoftware
35 .UCL - Unreal Tournament Cache Format Epic Games, Inc.
36 .UCLS - ObjectAid UML Explorer Class Diagram ObjectAid LLC
37 .UCM - Urban Chaos Game Format Viva Media
38 .UCP - SmartWare Communications Profile SmartWare Corporation
39 .UCR - MicroSim PCBoard Unrouted Nets Report Cadence Design Systems, Inc.
40 .UCS - Homeworld Localized Unicode Strings Relic Entertainment Inc.
41 .UCSETTINGS - Universal Converter Settings Anthony R. Daly
42 .UCT - UC Browser Theme Format UC Mobile
43 .UCV - Universal Converter Conversion Anthony R. Daly
44 .UCX - Rational XDE IBM
45 .UD - OmniPage User Dictionary Nuance Communications
46 .UDA - ZEMAX Model Data ZEMAX Development Corporation
47 .UDB - Dynamics AX User Database Format Microsoft
48 .UDC - Adobe User Dictionary Format Adobe Systems
49 .UDCX - Microsoft Office Universal Data Connection Format Microsoft
50 .UDEB - Debian Package Format The Debian Project
51 .UDF - Universal Disk Format Optical Storage Technology Association
52 .UDG - UDraw(Graph) Universität Bremen
53 .UDI - CorelDRAW Draw Script Textures Bitmap Corel Corporation
54 .UDID - Google Android Unique Device IDentifier Google Inc.
55 .UDIF - Apple Mac OS X Universal Disk Image Format Apple, Inc.
56 .UDK - Unreal Map Format Epic Games
57 .UDL - Microsoft Data Link Format Microsoft
58 .UDM - MapView User Module MotCreations.com
59 .UDO - Moray UDO 3D N/A
60 .UDP - Corel VideoStudio Scene Information Corel Corporation
61 .UDS - FIMware Database Format UB Foundation Activities, Inc
62 .UDW - Raw Unsigned DoubleWord (32-bit) Data N/A
63 .UDX - PI Expert Design Software Power Integrations
64 .UEA - Protector Suite QL Format AuthenTec
65 .UEED - Uconomix Encryption Engine Encrypted Directory Uconomix Technologies
66 .UENC - UltraEdit Encrypted Text IDM Computer Solutions, Inc.
67 .UES - Ulead Photo Explorer Slide Show Corel Corporation
68 .UEW - UltraEdit Wordfile IDM Computer Solutions, Inc.
69 .UEZ - Ulead COOL 3D Graphics Ulead Systems
70 .UFA - GIF Animator Animation Object Information N/A
71 .UFC - SATURN Suite Atkins-ITS Transport Software
72 .UFDR - UFED Physical Analyzer Report Package Cellebrite Mobile Synchronization LTD.
73 .UFF - DataWave SciWorks Physiological Data DataWave Technologies
74 .UFI - UFOCaptureV2 SonotaCo
75 .UFO - Ulead PhotoImpact Object Format Ulead
76 .UFP - Ulead Photo Project Corel Corporation
77 .UFR - Ultra Fractal Format Frederik Slijkerman
78 .UFS - FreeBSD PC-BSD Unix File System Format The FreeBSD Project
79 .UFS.UZIP - FreeBSD Compressed Unix File System Format The FreeBSD Project
80 .UFX - Ultimate 3D Game Engine Material Ultimate 3D
81 .UGD - Need For Speed Underground Electronic Arts, Inc.
82 .UGR - Apophysis Gradient Mark Townsend
83 .UHA - UHARC Compressed Archive UHarc
84 .UHH - Eurotherm Hydra History Encrypted Eurotherm UK
85 .UHS - Universal Hint System Binary Jason Strautman
86 .UHTM - Unreal Tournament Epic Games, Inc.
87 .UHTML - UHTML Document Format N/A
88 .UI - User Interface Format Nokia
89 .UIBAK - UltraISO Backup Disk Image EZB Systems
90 .UIC - COCO Unit ICon N/A
91 .UID - IBM Voice Type Users IBM
92 .UID-ZPS - Zoner Photo Studio Picture Autobackup ZONER, Inc.
93 .UIF - MagicISO Universal Image Format MagicISO
94 .UIL - IBM AIX User Interface Language IBM
95 .UIN - ICQ 2001 Saved ICQ Contact Information ICQ LLC
96 .UIR - LabWindows User Interface Resource National Instruments Corporation
97 .UIS - WindowBlinds Personality Format Stardock
98 .UIT - UIX XML Template N/A
99 .UIX - UiXML Page Oracle Corporation
100 .UIZ - Spybot Search & Destroy Updater Safer-Networking Ltd.
101 .UK - English (British) Language Translation N/A
102 .UKA - Fifa World Cup Game Data Electronic Arts, Inc.
103 .UKS - Microsoft Works Microsoft Corporation
104 .UKX - Unreal Tournament Animation Format Epic Games
105 .UKY - UltraMixer Licence Key UltraMixer Digital Audio Solutions
106 .ULAW - Raw CCITT/ITU G.711 US Telephony Audio Format N/A
107 .ULB - COBOL Unisys Library N/A
108 .ULD - Unified Luminaire Datafile DIAL GMBH
109 .ULF - Universal List Format N/A
110 .ULP - EAGLE Script CadSoft Computer, Inc.
111 .ULS - NetMeeting User Location Service Format Microsoft
112 .ULT - Ultratracker Music Module (MOD) Format N/A
113 .ULW - U-Law Audio Format N/A
114 .ULYS - Ulysses Project The Soulmen
115 .ULZ - USBlyzer Data Capture Format USBlyzer
116 .UMB - MemMaker Backup Microsoft Corporation
117 .UMD - UMD Mobile Ebook jumd team
118 .UMF - MediaHolder Media Format GetMediaHolder.com
119 .UML - Visual UML Class Diagram & Model Format N/A
120 .UMLCLASS - Java UML Class Model Format N/A
121 .UMLX - Visual UML XML Model Visual Object Modelers, Inc.
122 .UMM - Unified Molecular Modeling N/A
123 .UMOD - Unreal Tournament MOD Installation Package Format Epic Games
124 .UMP - UModel Project Altova
125 .UMR - MyEclipse UML Model Repository Genuitec, LLC
126 .UMS - Rune 3D Mesh Format Human Head Studios
127 .UMX - Deus Ex Format Eidos Interactive Ltd.
128 .UNA - SIMS Unauthorized Data Capita Business Services Ltd.
129 .UNAUTH - SiteMinder Unauthorized Message Format Netegrity
130 .UNCOMPRESSED_SIZE - Singularity Game Raven Software
131 .UNF - Btreive Unformatted Novell, Inc.
132 .UNI - UniMOD/MikMOD Music Module Format N/A
133 .UNITXT - YS FLIGHT Language N/A
134 .UNITY - Unity Scene Format Unity Technologies
135 .UNITY3D - Unity Scene Web Player Format Unity Technologies
136 .UNITYPACKAGE - Unity Package Format Unity Technologies
137 .UNITYPROJ - Unity 3D Project Unity Technologies
138 .UNIT_VARIANT - Total War Unit Variant Settings The Creative Assembly
139 .UNIX - Unix The Open Group
140 .UNK - UVProbe Format N/A
141 .UNKNOWN - Unknown File Extension N/A
142 .UNL - Garmin MapSource Unlock Format Garmin
143 .UNQ - ACT! 3.0 Email Message Attachment The Sage Group plc
144 .UNR - Unreal Map Format N/A
145 .UNS - Visual Navigation Suite Export Or Import Settings Nobeltec, Inc.
146 .UNT - AutoCAD Unit Definition Format Autodesk
147 .UNUSED - Photoline 4 Defaults Impressum
148 .UNV - BusinessObjects Universe SAP AG
149 .UNX - Unix Text Format N/A
150 .UOF - Uniform Office Format N/A
151 .UOL - PhotoImpact Clipart Image Ulead Systems
152 .UOP - Unified Office Format Presentation Format N/A
153 .UOS - Unified Office Format Spreadsheet Format N/A
154 .UOT - Unified Office Format Text Format N/A
155 .UPC - Ultimate Paint Component J-T-L Development Inc.
156 .UPD - Update Format N/A
157 .UPDATE - ISAPI Update Format EggCentric
158 .UPDATR - IConomy Update Format Nijikokun
159 .UPDF - UltraPdf Publication Software995
160 .UPF - Nokia Phone Digital Photo Format Nokia
161 .UPG - Firmware Upgrade Format N/A
162 .UPI - Ulead PhotoImpact Plugin N/A
163 .UPJ - Ulead Project N/A
164 .UPK - Unreal 3 Game Data Package Format Epic Games
165 .UPK0 - Metro 2033 Game 4A Games
166 .UPL - StarMoney Agent Download Star Finanz GmbH
167 .UPM - PenMail UC-Logic Technology Corp.
168 .UPO - DBASE Compiled Update Data dataBased Intelligence, Inc.
169 .UPOI - IGO Points Of Interest Format Nav N Go
170 .UPP - Ghostscript Uniprint Unified Printer Parameter Artifex Software
171 .UPR - FileMaker User Spelling Dictionary N/A
172 .UPS - Microsoft Works Microsoft Corporation
173 .UPX - Ultimate Packer For EXecutable Format Markus Oberhumer
174 .UPZ - StarMoney Agent Download Star Finanz GmbH
175 .UQM - The Ur-Quan Masters Archive Format The Ur-Quan Masters
176 .URC - Unicenter Remote Control CA Technologies
177 .URD - Ultra Recall Database Kinook Software, Inc.
178 .URD-JOURNAL - Ultra Recall Journal Update Kinook Software, Inc.
179 .URF - AppFace Skin Matinsoft Inc.
180 .URL - Internet Shortcut - URL - Uniform Resource Locator N/A
181 .URLS - GetRight Internet Shortcuts List Headlight Software, Inc.
182 .URL_ - Internet Shortcut - URL - Uniform Resource Locator N/A
183 .URP - Universal Report Universal Software C. T.
184 .URQ - Review QuickChart Chart Eurotherm UK
185 .URR - Uniface Signatures Format Compuware
186 .URS - ControlDraw User Requirement Specifier ControlDraw Ltd.
187 .URT - Utah Run-Length Encoded Bitmap Image Format N/A
188 .US - English Language Translation N/A
189 .US? - Microsoft Word Font Microsoft Corporation
190 .USA - Microsoft Office Headers Format Microsoft
191 .USB - SiSoftware Sandra SiSoftware
192 .USC - USC Module Definition Analogue Process Control Services
193 .USECASEDIAGRAM - Microsoft Visual Studio Use Case Diagram Microsoft Corporation
194 .USEQ - USeq Genome Data Format Huntsman Cancer Institute
195 .USER - Microsoft Visual Studio Project User Options Format Microsoft
196 .USERPROFILE - Norton Antivirus User Profile Format Symantec
197 .USERTILE-MS - Microsoft Windows 8 Release Preview User Tile Format Microsoft
198 .USF - Nintendo Ultra 64 Sound Format N/A
199 .USFLIB - Nintendo 64 Song Library Format N/A
200 .USG - PC-Doctor For Windows PC-Doctor, Inc.
201 .USH - Creston SIMPL Windows Creston Electronics, Inc.
202 .USI - UsiXML UI Description N/A
203 .USL - ProWORX Nxt USL Loadable Schneider Electric S.A.
204 .USM - USM Game Video Format N/A
205 .USP - PageMaker Printer Font Adobe Systems Incorporated
206 .USR - FileMaker Pro Runtime Engine Database Application FileMaker
207 .USS - WinUAE Saved State N/A
208 .UST - WiFi SiStr Exported User Theme Format DNsoft
209 .USTAR - Uniform Standard Tape Archive Format N/A
210 .USX - Unreal StaticMesh (hardware Brushes) Format Epic Games
211 .UT2 - Unreal Tournament Map Format Epic Games
212 .UT2MOD - Unreal Tournament 2003 MOD Installation Package Format Epic Games
213 .UT3 - Unreal Tournament 3 Map Format Epic Games
214 .UT4MOD - Unreal Tournament 2004 MOD Installation Package Format Epic Games
215 .UT8 - Ghost Master Language Format Sick Puppies
216 .UTB - µTBackup Backup N/A
217 .UTC - BioWare Aurora Game Engine Creature Format BioWare
218 .UTD - BioWare Aurora Game Engine Door BioWare
219 .UTE - BioWare Aurora Game Engine Encounter BioWare
220 .UTF8 - Unicode UTF-8 Encoded Text N/A
221 .UTI - Spybot - Search & Destroy Includes Safer-Networking Ltd.
222 .UTL - QuickBooks Data Intuit Inc.
223 .UTM - BioWare Aurora Game Engine Store BioWare
224 .UTP - BioWare Aurora Game Engine Placeable Object BioWare
225 .UTPART - µTorrent Unfinished Download BitTorrent, Inc.
226 .UTS - Spybot - Search & Destroy Include Safer-Networking Ltd.
227 .UTT - BioWare Aurora Engine Trigger BioWare
228 .UTW - Unity Whirld Format Aubrey Falconer
229 .UTX - Unreal Texture Format Epic Games
230 .UTXT - Unicode Text Format N/A
231 .UTZ - UIQ Theme Package UIQ Technology
232 .UU - Uuencoded (compressed) File Archive (ascii) N/A
233 .UUD - UUDecoded Format N/A
234 .UUE - UUEncoded Format N/A
235 .UUS - Ultra Utility Skin BobaFett
236 .UV2 - µVision Project ARM Holdings plc
237 .UVCAB - UVScreenCamera Films UVsoftium
238 .UVF - Uncertain Value Format N/A
239 .UVNTS - UVScreenCamera Notes UVsoftium
240 .UVPROJ - µVision4 Project ARM Holdings plc
241 .UVR - UVR Mesh N/A
242 .UVS - UVScreenCamera Segments UVsoftium
243 .UVSEG - UVScreenCamera Segments N/A
244 .UVW - 3D Studio MAX UVW Coordinates Autodesk, Inc.
245 .UVX - Unreal Tournament Saved Game Epic Games
246 .UW - Unsigned Word (16-bit) Music Format N/A
247 .UWF - UltraTracker WaveSample Music Format N/A
248 .UWL - Corel WordPerfect User Word List Format Corel
249 .UXDC - Microsoft Excel Data Retrieval Service Connection Microsoft Corporation
250 .UXF - UMLet UML EXchange Format UMLet Team
251 .UXX - Unreal Tournament 2003 Cache Format N/A
252 .UXY - Barudan Embroidery Outline Barudan
253 .UYVY - YUV 16-bit Image Format N/A
254 .UZ2 - Unreal Tournament Compressed Epic Games, Inc.
255 .UZE - UltimateZip Compressed Archive SWE von Schleusen
256 .UZIP - FreeBSD Compressed Disk Image Format Maxim Sobolev
257 .UZY - Backdoor.Sokacaps N/A