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O File Extensions

File Extension File Type Popularity
.OTFOpenType Font
.OBJWavefront 3D Object File
.ODTOpenDocument Text Document
.OCXActiveX Control
.OLDBackup File
.OGGOgg Vorbis Audio File
.OMFOpen Media Framework File
.ODPOpenDocument Presentation
.ODSOpenDocument Spreadsheet
.OV2TomTom Points of Interest Database
.OPMLOutline Processor Markup Language File
.OFXOpen Financial Exchange File
.OGVOgg Video File
.OVFOpen Virtualization File
.OEACCOUNTWindows Mail Account File
.OSZOsu! Beatmap File
.OUTOutput File
.OBIOutlook RSS Subscription File
.ORAOracle Database Configuration File
.ORIGOriginal File
.OSMOpenStreetMap Map File
.OSDXSearch Connector Description File
.OTRKEYOnlineTvRecorder Encoded Video File
.OPDOWNLOADOpera Partially Downloaded File
.OBKBackup File
.OMGImage File
.OBML16Opera Mini Saved Web Page
.ODINLocky Ransomware Encrypted File
.OPJUOrigin Unicode Project
.ORIOriginal File
.OEBOutlook Express Backup Wizard File
.OLBOLE Object Library
.OFTOutlook File Template
.OPSOffice Profile Settings File
.OFFObject File Format
.ODGOpenDocument Graphic File
.ODFOpenDocument Formula
.OTTOpenDocument Document Template
.OTPOpenDocument Presentation Template
.OTHOpenDocument HTML Template
.OTSOpenDocument Spreadsheet Template
.ORFOlympus RAW File
.OO3OmniOutliner 3 File
.OCompiled Object File
.OBJRelocatable Object Code
.ODEXOptimized Dalvik Executable
.OABOffline Address Book
.OGMOgg Media File
.OPXOrgPlus Org Chart
.OTAOTA Bitmap Image
.OYXApproach Alternate Database Index
.OKTOktalyzer Module
.OVEOverture Musical Score
.OTLNOpal Outline File
.OMOOMake Object File
.OLAOnline Access File
.OCACustom Control Library Type File
.ODXBizTalk Server Orchestration File
.OMFOMF Interchange Image File
.OGNCDynamic Web Page
.OMGOpenMG Audio File
.OPXFlipAlbum Photo Album File
.ODMOverDrive Media File
.OPTOptions File
.OFCOpen Financial Connectivity File
.OPDOmniPage Document
.ONEOneNote Document
.OMXOtsAV Media Library Information File
.OTSOtsAV Album File
.OFLOts File List
.OB!Orbit Downloader Incomplete Download
.OMASony OpenMG Music File
.ONDLotus Notes Encapsulated Memo File
.OVPNOpenVPN Configuration File
.OWLOWL Source Code File
.OTLNoteTab Outline File
.OGAOgg Vorbis Audio File
.OVAOpen Virtual Appliance
.OMPOffice Manager Document Archive
.OR6Lotus Organizer 6 File
.OXTApache OpenOffice Extension
.ONEPKGMicrosoft OneNote Package File
.OEMOEM Setup File
.OGXOgg Vorbis Multiplexed Media File
.ODBOpenDocument Database
.ODCOffice Data Connection File
.OPFOpen Packaging Format File
.OTMOutlook Macro File
.OSSMicrosoft Outlook Saved Search File
.ONETOC2Microsoft OneNote Table of Contents File
.OBMLOpera Mini Saved Web Page
.OVWLogic Pro Overview File
.OGFS.T.A.L.K.E.R. Model File
.OLK14MESSAGEOutlook Message File
.OBDOffice Binder Document
.OSTOutlook Offline Data File
.OSCOpenStreetMap Change File
.OUTCompiled Executable File
.OCTRadiance Octree File
.OQYExcel OLAP Query File
.OCTESTXcode Objective-C Unit Test Bundle
.OPJOrCAD Project File
.OMODOblivion Mod Archive
.OSROsu! Replay File
.OSZOpenLP Service File
.ONTtheWord Bible Text Module
.OTtheWord Old Testament Text Module
.ONTXtheWord Encrypted Bible Text Module
.OTXtheWord Encrypted Old Testament Text Module
.OC5openCanvas 5 Event File
.OCIopenCanvas Image
.OC3openCanvas 3 Event File
.OC4openCanvas 4 Event File
.OFMMelco Embroidery File
.OAMAdobe Edge Animate Widget File
.ODLObject Description Language File
.OSKOsu! Skin File
.ORAOpenRaster Image File
.OLMMac Outlook Database File
.OPLCNokia Operator Logo File
.OBBAndroid Opaque Binary Blob File
.OBWSuperior Drummer Sounds File
.OZBMU Online Image File
.OVHOMSI Vehicle Configuration File
.OLValve Hammer Object Layout File
.OFFICEUIMicrosoft Office UI Customization File
.OLPOffice Live Package
.OIVOpenIV Mod Package File
.ODTTFObfuscated OpenType Font
.OWXOutWit Hub Automator File
.OMPOpenMind Windows Document
.OBML15Opera Mini Saved Web Page
.OATAndroid Optimized Application File
.OMSHP Printer Substrate Presets Package File
.OPJOrigin Project
.OGWUOrigin Unicode Workbook File
.OGGUOrigin Unicode Graph File
.OTPUOrigin Unicode Graph Template
.OGMUOrigin Unicode Matrix File
.ODSOutlook Express 5 Mailbox
.OTFOpenDocument Formula Template
.OCRFAXGrapper Fax Text File
.OSObjectScript Source File
.ORXRadiantOne VDS Database Schema
.ORGLotus Organizer File
.OTGOpenDocument Graphic Template
.ODCOpenDocument Chart File
.OTCOpenDocument Chart Template
.ODIOpenDocument Image
.OTIOpenDocument Image Template
.ODMOpenDocument Master Document
.OPFFlipAlbum File
.OTBNokia Over The Air Bitmap Image
.OVWCubase WAVE Overview File
.OFMOmniForm Form
.OVLRollercoaster Tycoon 3 Data File
.OPFFlipViewer FlipBook File
.OVAOctava Musical Score
.OTFOpenTuft Tufting Design File
.OWGOutWit Gear Database
.OWCOutWit Catch Database
.OWMOutWit XML Mashup File
.OMCSOffice Manager Access File
.OR4IBM Lotus Organizer 97 GS File
.OR5Lotus Organizer 5 File
.OCEOpen Catalog Extension Connection File
.ORTRich Text Editor Document
.OPAXMicrosoft Office User Settings File
.OAROpenSimulator Archive
.OBZCompressed 3D Object File
.OLKOutlook Address Book File
.OGZCube 2 Map File
.ORDEREDTESTVisual Studio Ordered Test File
.OPTSLinux Configuration Options File
.OZOpera Job Management Compressed File
.OSPOpenShot Project File
.OEXOpera Extension
.OSAXAppleScript Scripting Addition
.OBPBryce Object File
.OLK14NOTEOutlook Note File
.OEBOpen eBook File
.OLK14GROUPOutlook Group File
.OLK14EVENTOutlook Calendar Event File
.OLK14CONTACTOutlook Contact File
.OLK14SIGNATUREOutlook Signature File
.OLK14CATEGORYOutlook Category File
.OLK14MAILACCOUNTOutlook Mail Account File
.OLK14MSGSOURCEOutlook Email Message Data File
.OSBOpenStreetMap Binary Map File
.OVRThe Overlay Maker Overlay File
.OVPThe Overlay Maker Package File
.OFROptimFROG Audio File
.OLBOrCAD Symbol Library File
.OBTOpenbox Theme File
.OXYGENEOxygene Project File
.OLTOrbit Downloads List
.OPDDurango Document
.OTZOpenLP Theme File
.OCRSubtitle Workshop OCR Script
.OEMOEMEdit Save File
.OCCOceanic DataPool File
.OPUSOpus Audio File
.OSUOsu! Script
.OSCObix Source Code File
.OZJMU Online Image File
.OZTMU Online Image File
.OPALMicrosoft Office User Settings File
.OPOpenPAT Report
.OP2Nastran Output File
.OP4Nastran Output File
.OVOLOGooVoo Log File
.OEBZIPZipped Open eBook File
.OLLTrialDirector Object Load List
.OO3TEMPLATEOmniOutliner Template
.OB2Oberon-2 Source Code File
.OPEICOOpeico Text File
.ORBOriginal eBook Reader File
.OLK14MSGATTACHOutlook 2011 Email Message Attachment File
.OLK15MSGATTACHOutlook 2016 Email Message Attachment File
.OGWOrigin Workbook File
.OTWOrigin Workbook Template
.OTWUOrigin Unicode Workbook Template
.OGGOrigin Graph File
.OTPOrigin Graph Template
.OGMOrigin Matrix File
.OTMOrigin Matrix Template
.OTMUOrigin Unicode Matrix Template
.OGSOrigin LabTalk Script File
.OPKGCW Zero Open Package
.OSBOsu! Storyboard File
.OBFOsmAnd Offline Map File
.OTAOTA Ringtone File
.ODTOOMMF Data Table File
.ODIFOpen Document Interchange Format
.ODFOpen Document File
.OR2Lotus Organizer 2 File
.OR3IBM Lotus Organizer 97 File
.OSXPowerPC Executable File
.OPENBSDOpenBSD Readme File
.ODOOnline Operating System Write Document
.ODMascopt Graph Request File
.ODFBattlezone Object Definition File
.OLK14TASKOutlook Task File
.OLK14PREFOutlook Preferences File
.OFRSMS Offer Manager File
.OPTOpterecenja File
.ORCVoyetra Digital Orchestrator File
.OWFree Pascal 1.0.x Object File
.OGSOrigons Movie Data File
.OREOre Executable File
.OOKArachne Batch Script
.OPTIONSSE-SOFT Configuration File
.ORVOracom Video File
.OPTAGT Game Data File
.ONETOCMicrosoft OneNote Table of Contents File
.OVXObject-based Visual Application Language File
.OTHOrigin Graph Theme File
.OISOrigin Analyses Theme File
.ODTOrigin Dialog Theme File
.OIFOrigin Import Filter File
.OFPOrigin Function Plot Theme File
.OGGSTRGodot Engine Ogg Audio File