Sorted alphabetically: O

#File extensionThe full name of the file
 
1 O File Extension Compiled Object Format
2 O01 File Extension Typhoon Voice
3 O2C File Extension Objects To See 3D
4 O8D File Extension OCTGN Deck
5 O8G File Extension OCTGN Game Definition
6 O8O File Extension Mediator 5 Repository Tabs Vorlagen.006
7 O8S File Extension OCTGN Set
8 OAB File Extension Offline Address Book
9 OAD File Extension Suite Notaro Document
10 OAF File Extension Microsoft Flight Simulator Texture
11 OAM File Extension Adobe Edge Animate Widget Format
12 OAP File Extension Samsung Bada Signed Installation Package
13 OAR File Extension OpenSimulator Archive
14 OAS File Extension Microsoft Outlook Attachment Sniffer
15 OAT File Extension Google Android RunTime Code
16 OAV File Extension Microsoft Flight Simulator Texture
17 OAW File Extension OpenArchitectureWare Workflow
18 OAZ File Extension NetFax Manager OAZ Fax Image
19 OB File Extension IBM LinkWay Object
20 OB! File Extension Orbit Downloader Incomplete Download
21 OB3 File Extension ABF Software Outlook Backup Backup
22 OB5 File Extension TopLang OE Backup
23 OBAK File Extension WinSQL Offline Backup
24 OBB File Extension Android Opaque Binary Blob Format
25 OBD File Extension Office Binder Document
26 OBF File Extension OsmAnd Offline GPS Vector Maps
27 OBG File Extension ZBrush Mesh
28 OBI File Extension Outlook RSS Subscription Format
29 OBJ File Extension Wavefront 3D Object Format
30 OBJX File Extension Metatools Object Bryce Support
31 OBK File Extension OrCAD Capture Design Or Library
32 OBL File Extension TrueSpace
33 OBML File Extension Opera Mini Saved Web Page
34 OBML15 File Extension Opera Mini 5.1 Saved Web Page
35 OBP File Extension Bryce Object Format
36 OBPACK File Extension ObjectBar Theme Pack
37 OBR File Extension Borland C++ Object Browser Data
38 OBS File Extension WAsP Obstacle List
39 OBT File Extension Openbox Theme Format
40 OBV File Extension 3D Photo Browser Thumbnail Cache
41 OBW File Extension Superior Drummer Sounds Format
42 OBX File Extension Rational XDE
43 OBYX File Extension Obyx Control
44 OBZ File Extension Compressed 3D Object Format
45 OC3 File Extension OpenCanvas 3 Event Format
46 OC4 File Extension OpenCanvas 4 Event Format
47 OC5 File Extension OpenCanvas 5 Event Format
48 OC9 File Extension OrgCon Organization
49 OCA File Extension Custom Control Library Type Format
50 OCAMLMAKEFILE File Extension Caml Programming Language Makefile
51 OCB File Extension Origin Precompiled Origin C
52 OCC File Extension Oceanic DataPool Format
53 OCD File Extension OCAD Map Format
54 OCDC File Extension Mathematica Document
55 OCDF File Extension OneClickDigital Mp3 Audio Book
56 OCE File Extension Open Catalog Extension Connection Format
57 OCEN File Extension EdGCM Data
58 OCF File Extension OM2 Cipher
59 OCG File Extension Osprey Custom Graph
60 OCI File Extension OpenCanvas Image
61 OCM File Extension Netscape Communicator Aim
62 OCP File Extension Advanced Art Studio Image
63 OCR File Extension FAXGrapper Fax Text Format
64 OCT File Extension Radiance Octree Format
65 OCTEST File Extension Xcode Objective-C Unit Test Bundle
66 OCV File Extension OCV Training Data
67 OCX File Extension ActiveX Control
68 OC_ File Extension Compressed ActiveX Control
69 OD File Extension Mascopt Graph Request Format
70 OD1 File Extension Omnis 5 Database
71 OD2 File Extension Omnis 5 Database
72 OD3 File Extension Omnis Studio Database
73 OD4-9 File Extension Omnis5 Database
74 ODB File Extension OpenDocument Database
75 ODC File Extension Office Data Connection Format
76 ODCCUBEFILE File Extension OpenDocument 1
77 ODCNEWFILE File Extension Microsoft Office Data Connection
78 ODCTABLEFILE File Extension Microsoft Office
79 ODE File Extension Microsoft Office
80 ODEX File Extension Google Android Optimized Executalbe
81 ODF File Extension OpenDocument Formula
82 ODG File Extension OpenDocument Graphic Format
83 ODH File Extension Microsoft Visual Studio Interface Definition Language
84 ODI File Extension OpenDocument Image
85 ODIF File Extension Open Document Interchange Format
86 ODL File Extension Object Description Language Format
87 ODM File Extension OverDrive Media Format
88 ODO File Extension Online Operating System Write Document
89 ODP File Extension OpenDocument Presentation
90 ODS File Extension OpenDocument Spreadsheet
91 ODT File Extension OpenDocument Text Document
92 ODT# File Extension OpenOffice.org Locked Document
93 ODTPC File Extension Oracle User Productivity Kit Presentation
94 ODTTF File Extension Microsoft Office Document Embedded Font
95 ODV File Extension Ocean Data View Data
96 ODVI File Extension LaTeX
97 ODX File Extension BizTalk Server Orchestration Format
98 OD_ File Extension Oracle Compressed Driver
99 OEACCAOUNT File Extension Windows Mail
100 OEACCOUNT File Extension Windows Mail Account Format
101 OEB File Extension Outlook Express Backup Wizard Format
102 OECL File Extension Open EDA Component Library
103 OEF File Extension Optim Export
104 OEM File Extension OEM Setup Format
105 OEMIGACCOUNT File Extension Outlook Express Temporary
106 OET File Extension ESignal Order Entry Ticket
107 OEX File Extension Opera Extension
108 OFA File Extension Kodak OfotoNow
109 OFB File Extension Oxygen Forensic Suite Backup
110 OFC File Extension Open Financial Connectivity Format
111 OFD File Extension ObjectView Form Definition
112 OFF File Extension Object Format Format
113 OFFICEUI File Extension Microsoft Office UI Customization
114 OFFSETS File Extension Offset
115 OFL File Extension Ots Format List
116 OFM File Extension Melco Embroidery Format
117 OFN File Extension MS Office Format New (Other Office Documents)
118 OFP File Extension Objecteering Project
119 OFR File Extension OptimFROG Audio Format
120 OFS File Extension OptimFROG Dualstream
121 OFT File Extension Outlook Format Template
122 OFX File Extension Open Financial Exchange Format
123 OGA File Extension Ogg Vorbis Audio Format
124 OGD File Extension Oracle Forms Graph
125 OGF File Extension S.T.A.L.K.E.R. Model Format
126 OGG File Extension Ogg Vorbis Audio Format
127 OGL File Extension ATI Overlay Source Code
128 OGM File Extension Ogg Media Format
129 OGNC File Extension Dynamic Web Page
130 OGO File Extension Origin Graphic Object
131 OGR File Extension OGR C++ Open Source Library
132 OGS File Extension Origons Movie Data Format
133 OGV File Extension Ogg Video Format
134 OGW File Extension OriginLab Worksheet
135 OGX File Extension Ogg Vorbis Multiplexed Media Format
136 OGZ File Extension Cube 2 Map Format
137 OH File Extension DrillAssistant List
138 OH4 File Extension Overhoor List
139 OHP File Extension MS-DOS 7
140 OHS File Extension Bink Outbound History
141 OHW File Extension Overhoor DrillAssistant List
142 OIF File Extension QuickBase Web-sharable Database Interchange
143 OIL File Extension Open Image Library Format Image Format
144 OJP File Extension 3WayPack
145 OK File Extension Qedit
146 OKM File Extension OkMap Map Defining
147 OKOZO File Extension Okozo Desktop Animation
148 OKR File Extension PowerRecover One Key Recovery
149 OKS File Extension OKScript
150 OKT File Extension Oktalyzer Module
151 OKX File Extension OKScript
152 OL File Extension Valve Hammer Object Layout
153 OLA File Extension Online Access Format
154 OLB File Extension OLE Object Library
155 OLB2 File Extension CanOpener Library
156 OLD File Extension Backup Format
157 OLE File Extension Microsoft Object Linking And Embedding
158 OLE2 File Extension Microsoft Office Binary Document Container Format
159 OLF File Extension OyezForms Legal Documents
160 OLK File Extension Outlook Address Book Format
161 OLK14CATEGORY File Extension Outlook Category Format
162 OLK14CONTACT File Extension Outlook Contact Format
163 OLK14DBHEADER File Extension Microsoft Outlook 2011 For Mac Database
164 OLK14EVENT File Extension Outlook Calendar Event Format
165 OLK14FOLDER File Extension Microsoft Outlook 2011 For Mac Folder
166 OLK14GROUP File Extension Outlook Group Format
167 OLK14MAILACCOUNT File Extension Outlook Mail Account Format
168 OLK14MESSAGE File Extension Outlook Message Format
169 OLK14MSGATTACH File Extension Microsoft Outlook 2011 For Mac Message Attachment
170 OLK14MSGSOURCE File Extension Outlook Email Message Data Format
171 OLK14NOTE File Extension Outlook Note Format
172 OLK14PREF File Extension Outlook Preferences Format
173 OLK14RECENT File Extension Microsoft Outlook 2011 For Mac Recent Address
174 OLK14RULE File Extension Microsoft Outlook 2011 For Mac Rule
175 OLK14SCHEDULE File Extension Microsoft Outlook 2011 For Mac Schedule
176 OLK14SEARCH File Extension Microsoft Outlook 2011 For Mac Saved Search
177 OLK14SIGNATURE File Extension Outlook Signature Format
178 OLK14TASK File Extension Outlook Task Format
179 OLK14UID File Extension Microsoft Outlook 2011 For Mac UID
180 OLL File Extension TrialDirector Load
181 OLM File Extension Mac Outlook Database Format
182 OLN File Extension Microsoft Visual C++ Outline Examples
183 OLPROJ File Extension Adobe OnLocation
184 OLS File Extension Microsoft Office List Shortcut
185 OLT File Extension Orbit Downloads List
186 OLV File Extension Roller Coaster Tycoon
187 OLY File Extension AFP Advanced Function Presentation Overlay Resource
188 OMA File Extension Sony OpenMG Music Format
189 OMC File Extension Origin Customized Menu
190 OMCS File Extension Office Manager Access Format
191 OMD File Extension MapInfo Routing J Server Data
192 OMEG File Extension Mathematica For Mac
193 OMF File Extension Open Media Framework Format
194 OMFI File Extension Open Media Framework
195 OMG File Extension O&O DiskImage Backup Format
196 OML File Extension TracePro Model
197 OMN File Extension Omnipotent Collection
198 OMO File Extension OMake Object Format
199 OMOD File Extension Oblivion Mod Archive
200 OMP File Extension Office Manager Document Archive
201 OMR File Extension OMR Template
202 OMS File Extension Order Maven
203 OMT File Extension SITH HLA Object Model Template
204 OMX File Extension OtsAV Media Library Information Format
205 ON2 File Extension On2 Encoded FLV
206 OND File Extension Lotus Notes Encapsulated Memo Format
207 ONE File Extension OneNote Document
208 ONECACHE File Extension Microsoft OneNote Cache
209 ONEPKG File Extension Microsoft OneNote Package Format
210 ONETMP File Extension Microsoft OneNote Temporary
211 ONETOC File Extension Microsoft OneNote Table Of Contents
212 ONETOC2 File Extension Microsoft OneNote Table Of Contents Format
213 ONM File Extension Outdoor Navigator Map
214 ONT File Extension TheWord Bible Text Module
215 ONTX File Extension TheWord Encrypted Bible Text Module
216 ONW File Extension Omron HMI NTST
217 ONX File Extension OnyxGrass Image
218 OO3 File Extension OmniOutliner 3 Format
219 OOG File Extension PyGraph Python Graphics Interface Object Oriented Graphics
220 OOGL File Extension Geomview Object Oriented Graphics Library
221 OOK File Extension Arachne Batch Script
222 OOS File Extension OpenOffice.org Spreadsheet
223 OOT File Extension OpenOffice.org Text
224 OP File Extension ESignal OptionsPlus
225 OP2 File Extension Outpost 2 Saved Game
226 OP4 File Extension Nastran Output
227 OPA File Extension Fly! RAW Image Opacity Map
228 OPAL File Extension Microsoft Office Customization Tool (OCT) Language-specific Settings
229 OPAX File Extension Microsoft Office Customization Tool (OCT) Standard Settings
230 OPB File Extension Bryce Object
231 OPC File Extension Microsoft Office 97 Upgrade Control
232 OPD File Extension Durango Interferometry Software Document Format
233 OPDOWNLOAD File Extension Opera Partially Downloaded Format
234 OPEF File Extension OmniPass Encrypted Folder
235 OPENBSD File Extension OpenBSD Readme Format
236 OPF File Extension Open Packaging Format Format
237 OPG File Extension Offline Plan Generation Package
238 OPI File Extension Adlib OCR Processing Information
239 OPJ File Extension OrCAD Project Format
240 OPK File Extension Sinking Island/LIle Noyée Game
241 OPLC File Extension Nokia Operator Logo Format
242 OPLM File Extension Outline Processor Markup Language
243 OPML File Extension Outline Processor Markup Language Format
244 OPN File Extension Court Opinion
245 OPP File Extension IPhotoDVD
246 OPPC File Extension Space Marine Game Resource Package
247 OPQ File Extension Eschalon: Book I Game
248 OPR File Extension OPRO X Browser
249 OPS File Extension Office Profile Settings Format
250 OPT File Extension MySQL Database Data Format
251 OPTIONS File Extension SE-SOFT Configuration Format
252 OPTS File Extension Linux Configuration Options Format
253 OPUS File Extension Opus Audio Format
254 OPW File Extension OrgPlus For Windows Organization Chart
255 OPX File Extension OrgPlus Org Chart
256 OPXT File Extension OrpPlus Template
257 OPY File Extension OptiY Model
258 OP_ File Extension GKSetup Support
259 OQY File Extension Excel OLAP Query Format
260 OR2 File Extension Lotus Organizer 2 Format
261 OR3 File Extension IBM Lotus Organizer 97 Format
262 OR4 File Extension IBM Lotus Organizer 97 GS Format
263 OR5 File Extension Lotus Organizer 5 Format
264 OR6 File Extension Lotus Organizer 6 Format
265 OR8 File Extension Rational Rose Oracle8 Database Model Report
266 ORA File Extension Oracle Database Configuration Format
267 ORB File Extension Original EBook Reader Ebook
268 ORC File Extension CSound Orchestra Midi Format
269 ORDEREDTEST File Extension Visual Studio Ordered Test Format
270 ORE File Extension Ore Executable Format
271 ORF File Extension Olympus RAW Format
272 ORG File Extension Lotus Organizer Format
273 ORG2+ File Extension Lotus Organizer
274 ORI File Extension Original Format
275 ORIG File Extension Original Format
276 ORIGINAL File Extension Netobjects Fusion Components Bbscomp Message
277 ORIGINAL_EPUB File Extension EPUB Ebook Backup
278 ORIGINAL_MOBI File Extension MOBI Ebook Backup
279 ORK File Extension Warhammer Mark Of Chaos Game Archive
280 ORL File Extension Object-Relational Language
281 ORMDESIGNER File Extension ORM Designer Project
282 ORS File Extension DSP Group TrueSpeech Audio Format
283 ORT File Extension COREX Orthographic Transcriptions Format
284 ORV File Extension Oracom Video Format
285 ORX File Extension RadiantOne VDS Database Schema
286 ORZ File Extension Holic Game
287 OS File Extension ObjectScript Source Format
288 OS2 File Extension Os2 System
289 OS3 File Extension OS/2 Warp 3
290 OSA File Extension W32/Sober-AD
291 OSAS File Extension Apple Script Library Tani Script
292 OSAX File Extension FindFile OSAX Mac Format Type
293 OSB File Extension OpenStreetMap Binary Map Format
294 OSBX File Extension OneSafe Exported Backup
295 OSC File Extension Remote Installation Services Client Installation Wizard Format
296 OSCD File Extension TouchOSC Interface Editor Template
297 OSD File Extension Open Software Description
298 OSDX File Extension Search Connector Description Format
299 OSF File Extension Descent 3 Sound
300 OSG File Extension OSGJS JSON Input
301 OSK File Extension Osu! Skin Format
302 OSL File Extension OckamSoft Log
303 OSM File Extension OpenStreetMap Map Format
304 OSP File Extension OpenShot Project Format
305 OSR File Extension Osu! Replay Format
306 OSS File Extension Microsoft Outlook Saved Search Format
307 OST File Extension Outlook Offline Folder Format
308 OSU File Extension Osu! Script
309 OSW File Extension ONESWING Contents
310 OSX File Extension PowerPC Executable Format
311 OSZ File Extension Osu! Beatmap Format
312 OT File Extension TheWord Old Testament Text Module
313 OTA File Extension OTA Bitmap Image
314 OTB File Extension Nokia Over The Air Bitmap Image
315 OTC File Extension OpenDocument Chart Template
316 OTD File Extension OpenIV Texture Data
317 OTF File Extension OpenType Font
318 OTG File Extension OpenDocument Graphic Template
319 OTH File Extension OpenDocument HTML Template
320 OTI File Extension OpenDocument Image Template
321 OTL File Extension NoteTab Outline Format
322 OTLN File Extension Opal Outline Format
323 OTM File Extension Outlook Macro Format
324 OTP File Extension OpenDocument Presentation Template
325 OTR File Extension IRIX Complied FTR
326 OTRKEY File Extension OnlineTvRecorder Encoded Video Format
327 OTS File Extension OpenDocument Spreadsheet Template
328 OTT File Extension OpenDocument Document Template
329 OTV File Extension Rotor-Disc OTV Kit OTV Calibration
330 OTX File Extension TheWord Encrypted Old Testament Text Module
331 OTZ File Extension OpenLP Theme Format
332 OUT File Extension Output Format
333 OUTLINE File Extension FontTwister Letter Outline
334 OUTLOOK97 File Extension Microsoft Outlook Custom Mail
335 OUX File Extension Bibexcel
336 OV File Extension OpenInsight Database Overflow
337 OV1 File Extension Overlay
338 OV2 File Extension TomTom Points Of Interest Database
339 OV3 File Extension Overlay
340 OV4 File Extension Overlay
341 OV5 File Extension Overlay
342 OVA File Extension Open Virtual Appliance
343 OVD File Extension ObjectVision Data
344 OVE File Extension Overture Musical Score
345 OVF File Extension Open Virtualization Format
346 OVG File Extension ObjectVision Converted Graphic
347 OVH File Extension OMSI Bus Settings
348 OVL File Extension Rollercoaster Tycoon 3 Data Format
349 OVOLOG File Extension OoVoo Log
350 OVP File Extension The Overlay Maker Package Format
351 OVPN File Extension OpenVPN Configuration Format
352 OVR File Extension The Overlay Maker Overlay Format
353 OVS File Extension Ovation 1 Style Sheet
354 OVW File Extension Logic Pro Overview Format
355 OW File Extension Free Pascal 1.0.x Object Format
356 OWC File Extension OutWit Catch Database
357 OWG File Extension OutWit Gear Database
358 OWL File Extension OWL Source Code Format
359 OWM File Extension OutWit XML Mashup Format
360 OWR File Extension PeopleSoft Results Archive
361 OWS File Extension Web Studio Project
362 OWT File Extension Ancestry.com OneWorldTree
363 OX File Extension Ox Object-Oriented Matrix Programming Language
364 OXD File Extension PS3 Proxy Server
365 OXF File Extension IBM Rational Rhapsody
366 OXO File Extension Ox Object-Oriented Matrix Programming Language
367 OXPS File Extension OpenXPS Format
368 OXT File Extension Apache OpenOffice Extension
369 OXYGENE File Extension Oxygene Project Format
370 OYX File Extension Approach Alternate Database Index
371 OYZ File Extension Lotus Approach Alternate DBASE Index
372 OZ File Extension Opera Job Management Compressed Format
373 OZF2 File Extension OziExplorer Map
374 OZFX3 File Extension OziExplorer Image
375 OZJ File Extension Mu Online Graphic
376 OZP File Extension Orgadata LogiKal
377 OZT File Extension Mu Online Texture
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THM

Thumbnail Image Format

THM is a format created for purpose of storing small raster images (thumbnails), which depict equivalent, full-size images/graphics, but in a small...