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Extension Abbreviation Extension Full name How to open the File Extension
.o Compiled Object File How to open .o file
.oab Offline Address Book How to open .oab file
.oam Adobe Edge Animate Widget File How to open .oam file
.oap OutSystems Application Package How to open .oap file
.oar OpenSimulator Archive How to open .oar file
.oat Android Optimized Application File How to open .oat file
.ob! Orbit Downloader Incomplete Download How to open .ob! file
.ob2 Oberon-2 Source Code File How to open .ob2 file
.obb Android Opaque Binary Blob File How to open .obb file
.obd Office Binder Document How to open .obd file
.obf OsmAnd Offline Map File How to open .obf file
.obi Outlook RSS Subscription File How to open .obi file
.obj Wavefront 3D Object File How to open .obj file
.obk Backup File How to open .obk file
.obk OrangeCD Backup File How to open .obk file
.obml Opera Mini Saved Webpage How to open .obml file
.obml15 Opera Mini Saved Webpage How to open .obml15 file
.obml16 Opera Mini Saved Webpage How to open .obml16 file
.obp Bryce Object File How to open .obp file
.obt Openbox Theme File How to open .obt file
.obw Superior Drummer Sounds File How to open .obw file
.obz Compressed 3D Object File How to open .obz file
.oc3 openCanvas 3 Event File How to open .oc3 file
.oc4 openCanvas 4 Event File How to open .oc4 file
.oc5 openCanvas 5 Event File How to open .oc5 file
.oca Custom Control Library Type File How to open .oca file
.occ Oceanic DataPool File How to open .occ file
.ocd OCAD Map File How to open .ocd file
.oce Open Catalog Extension Connection File How to open .oce file
.oci openCanvas Image How to open .oci file
.ocimf OCIMF HVPQ File How to open .ocimf file
.ocr Subtitle Workshop OCR Script How to open .ocr file
.ocr FAXGrapper Fax Text File How to open .ocr file
.oct Radiance Octree File How to open .oct file
.octest Xcode Objective-C Unit Test Bundle How to open .octest file
.ocx ActiveX Control How to open .ocx file
.od Mascopt Graph Request File How to open .od file
.odb OpenDocument Database How to open .odb file
.odc Office Data Connection File How to open .odc file
.odc OpenDocument Chart File How to open .odc file
.odex Optimized Dalvik Executable How to open .odex file
.odf OpenDocument Formula How to open .odf file
.odf Battlezone Object Definition File How to open .odf file
.odf Open Document File How to open .odf file
.odg OpenDocument Graphic File How to open .odg file
.odi OpenDocument Image How to open .odi file
.odif Open Document Interchange Format How to open .odif file
.odin Locky Ransomware Encrypted File How to open .odin file
.odl Object Description Language File How to open .odl file
.odm OverDrive Media File How to open .odm file
.odm OpenDocument Master Document How to open .odm file
.odo Online Operating System Write Document How to open .odo file
.odoc Synology Office Document Pointer How to open .odoc file
.odp OpenDocument Presentation How to open .odp file
.odp Organ Definition Project How to open .odp file
.ods OpenDocument Spreadsheet How to open .ods file
.ods Outlook Express 5 Mailbox How to open .ods file
.odt OpenDocument Text Document How to open .odt file
.odt Origin Dialog Theme File How to open .odt file
.odt OOMMF Data Table File How to open .odt file
.odttf Obfuscated OpenType Font How to open .odttf file
.odx BizTalk Server Orchestration File How to open .odx file
.oeaccount Windows Mail Account File How to open .oeaccount file
.oeb Open eBook File How to open .oeb file
.oeb Outlook Express Backup Wizard File How to open .oeb file
.oebzip Zipped Open eBook File How to open .oebzip file
.oem OEM Setup File How to open .oem file
.oem OEMEdit Save File How to open .oem file
.oesavestate OpenEmu Saved Game How to open .oesavestate file
.oex Opera Extension How to open .oex file
.ofc Open Financial Connectivity File How to open .ofc file
.ofd OfficeForms Document How to open .ofd file
.off Object File Format How to open .off file
.officeui Microsoft Office UI Customization File How to open .officeui file
.ofl Ots File List How to open .ofl file
.ofm OmniForm Form How to open .ofm file
.ofm Melco Embroidery File How to open .ofm file
.ofp Origin Function Plot Theme File How to open .ofp file
.ofr OptimFROG Audio File How to open .ofr file
.ofr SMS Offer Manager File How to open .ofr file
.oft Outlook File Template How to open .oft file
.ofx Open Financial Exchange File How to open .ofx file
.oga Ogg Vorbis Audio File How to open .oga file
.ogf S.T.A.L.K.E.R. Model File How to open .ogf file
.ogg Ogg Vorbis Audio File How to open .ogg file
.ogg Origin Graph File How to open .ogg file
.oggstr Godot Engine Ogg Audio File How to open .oggstr file
.oggu Origin Unicode Graph File How to open .oggu file
.ogm Ogg Media File How to open .ogm file
.ogm Origin Matrix File How to open .ogm file
.ogmu Origin Unicode Matrix File How to open .ogmu file
.ognc Dynamic Web Page How to open .ognc file
.ogs Origin LabTalk Script File How to open .ogs file
.ogs Origons Movie Data File How to open .ogs file
.ogv Ogg Video File How to open .ogv file
.ogw Origin Workbook File How to open .ogw file
.ogwu Origin Unicode Workbook File How to open .ogwu file
.ogx Ogg Vorbis Multiplexed Media File How to open .ogx file
.ogz Cube 2 Map File How to open .ogz file
.oif Origin Import Filter File How to open .oif file
.ois Origin Analyses Theme File How to open .ois file
.oiv OpenIV Mod Package File How to open .oiv file
.okt Oktalyzer Module How to open .okt file
.ol Valve Hammer Object Layout File How to open .ol file
.ola Online Access File How to open .ola file
.olb OLE Object Library How to open .olb file
.olb OrCAD Symbol Library File How to open .olb file
.old Backup File How to open .old file
.olk Outlook Address Book File How to open .olk file
.olk14category Outlook Category File How to open .olk14category file
.olk14contact Outlook Contact File How to open .olk14contact file
.olk14event Outlook Calendar Event File How to open .olk14event file
.olk14group Outlook Group File How to open .olk14group file
.olk14mailaccount Outlook Mail Account File How to open .olk14mailaccount file
.olk14message Outlook Message File How to open .olk14message file
.olk14msgattach Outlook 2011 Email Message Attachment File How to open .olk14msgattach file
.olk14msgsource Outlook Email Message Data File How to open .olk14msgsource file
.olk14note Outlook Note File How to open .olk14note file
.olk14pref Outlook Preferences File How to open .olk14pref file
.olk14signature Outlook Signature File How to open .olk14signature file
.olk14task Outlook Task File How to open .olk14task file
.olk15msgattach Outlook 2016 Email Message Attachment File How to open .olk15msgattach file
.oll TrialDirector Object Load List How to open .oll file
.olm Mac Outlook Database File How to open .olm file
.olp Office Live Package How to open .olp file
.olt Orbit Downloads List How to open .olt file
.oma Sony OpenMG Music File How to open .oma file
.omcs Office Manager Access File How to open .omcs file
.omf Open Media Framework File How to open .omf file
.omg Image File How to open .omg file
.omg OpenMG Audio File How to open .omg file
.oml OutSystems Modeling Language File How to open .oml file
.omo OMake Object File How to open .omo file
.omod Oblivion Mod Archive How to open .omod file
.omp Office Manager Document Archive How to open .omp file
.omp OpenMind Windows Document How to open .omp file
.oms HP Printer Substrate Presets Package File How to open .oms file
.omx OtsAV Media Library Information File How to open .omx file
.ond Lotus Notes Encapsulated Memo File How to open .ond file
.one OneNote Document How to open .one file
.onepkg Microsoft OneNote Package File How to open .onepkg file
.onetoc Microsoft OneNote Table of Contents File How to open .onetoc file
.onetoc2 Microsoft OneNote Table of Contents File How to open .onetoc2 file
.ont theWord Bible Text Module How to open .ont file
.ontx theWord Encrypted Bible Text Module How to open .ontx file
.oo3 OmniOutliner 3 File How to open .oo3 file
.oo3template OmniOutliner Template How to open .oo3template file
.ook Arachne Batch Script How to open .ook file
.op OpenPAT Report How to open .op file
.op2 Nastran Output File How to open .op2 file
.op4 Nastran Output File How to open .op4 file
.opal Microsoft Office User Settings File How to open .opal file
.opax Microsoft Office User Settings File How to open .opax file
.opd OmniPage Document How to open .opd file
.opd Durango Document How to open .opd file
.opdownload Opera Partially Downloaded File How to open .opdownload file
.opeico Opeico Text File How to open .opeico file
.openbsd OpenBSD Readme File How to open .openbsd file
.opf FlipViewer FlipBook File How to open .opf file
.opf FlipAlbum File How to open .opf file
.opf Open Packaging Format File How to open .opf file
.opj Origin Project How to open .opj file
.opj OrCAD Project File How to open .opj file
.opju Origin Unicode Project How to open .opju file
.opk GCW Zero Open Package How to open .opk file
.oplc Nokia Operator Logo File How to open .oplc file
.opml Outline Processor Markup Language File How to open .opml file
.ops Office Profile Settings File How to open .ops file
.opt Options File How to open .opt file
.opt Opterecenja File How to open .opt file
.options SE-SOFT Configuration File How to open .options file
.opts Linux Configuration Options File How to open .opts file
.opus Opus Audio File How to open .opus file
.opx OrgPlus Org Chart How to open .opx file
.opx FlipAlbum Photo Album File How to open .opx file
.oqy Microsoft Excel OLAP Query How to open .oqy file
.or2 Lotus Organizer 2 File How to open .or2 file
.or3 IBM Lotus Organizer 97 File How to open .or3 file
.or4 IBM Lotus Organizer 97 GS File How to open .or4 file
.or5 Lotus Organizer 5 File How to open .or5 file
.or6 Lotus Organizer 6 File How to open .or6 file
.ora Oracle Database Configuration File How to open .ora file
.orb Original eBook Reader File How to open .orb file
.orc Voyetra Digital Orchestrator File How to open .orc file
.orderedtest Visual Studio Ordered Test File How to open .orderedtest file
.ore Ore Executable File How to open .ore file
.orf Olympus RAW File How to open .orf file
.org Lotus Organizer File How to open .org file
.org Organya Music File How to open .org file
.org Emacs Org Text Document How to open .org file
.ori Original File How to open .ori file
.orig Original File How to open .orig file
.ort Rich Text Editor Document How to open .ort file
.orv Oracom Video File How to open .orv file
.orx RadiantOne VDS Database Schema How to open .orx file
.os ObjectScript Source File How to open .os file
.osax AppleScript Scripting Addition How to open .osax file
.osb Osu! Storyboard File How to open .osb file
.osb OpenStreetMap Binary Map File How to open .osb file
.osc OpenStreetMap Change File How to open .osc file
.osdx Search Connector Description File How to open .osdx file
.osk osu! Skin File How to open .osk file
.osm OpenStreetMap Map File How to open .osm file
.osp OpenShot Project File How to open .osp file
.osr osu! Replay File How to open .osr file
.oss Microsoft Outlook Saved Search File How to open .oss file
.ost Outlook Offline Data File How to open .ost file
.osu Osu! Script How to open .osu file
.osx PowerPC Executable File How to open .osx file
.osz osu! Beatmap File How to open .osz file
.osz OpenLP Service File How to open .osz file
.ot theWord Old Testament Text Module How to open .ot file
.ota OTA Bitmap Image How to open .ota file
.otb Nokia Over The Air Bitmap Image How to open .otb file
.otc OpenDocument Chart Template How to open .otc file
.otf OpenType Font How to open .otf file
.otf OpenDocument Formula Template How to open .otf file
.otf OpenTuft Tufting Design File How to open .otf file
.otg OpenDocument Graphic Template How to open .otg file
.oth OpenDocument HTML Template How to open .oth file
.oth Origin Graph Theme File How to open .oth file
.oti OpenDocument Image Template How to open .oti file
.otl NoteTab Outline File How to open .otl file
.otln Opal Outline File How to open .otln file
.otm Origin Matrix Template How to open .otm file
.otm Outlook Macro File How to open .otm file
.otmu Origin Unicode Matrix Template How to open .otmu file
.otp OpenDocument Presentation Template How to open .otp file
.otp Origin Graph Template How to open .otp file
.otpu Origin Unicode Graph Template How to open .otpu file
.otrkey OnlineTvRecorder Encoded Video File How to open .otrkey file
.ots OpenDocument Spreadsheet Template How to open .ots file
.ots OtsAV Album File How to open .ots file
.ott OpenDocument Document Template How to open .ott file
.otw Origin Workbook Template How to open .otw file
.otwu Origin Unicode Workbook Template How to open .otwu file
.otx theWord Encrypted Old Testament Text Module How to open .otx file
.otz OpenLP Theme File How to open .otz file
.out Compiled Executable File How to open .out file
.ov2 TomTom Points of Interest Database How to open .ov2 file
.ova Open Virtual Appliance How to open .ova file
.ova Octava Musical Score How to open .ova file
.ove Overture Musical Score How to open .ove file
.ovf Open Virtualization File How to open .ovf file
.ovh OMSI Vehicle Configuration File How to open .ovh file
.ovl Rollercoaster Tycoon 3 Data File How to open .ovl file
.ovolog ooVoo Log File How to open .ovolog file
.ovp The Overlay Maker Package File How to open .ovp file
.ovpn OpenVPN Configuration File How to open .ovpn file
.ovr The Overlay Maker Overlay File How to open .ovr file
.ovw Logic Pro Overview File How to open .ovw file
.ovw Cubase WAVE Overview File How to open .ovw file
.ovx Object-based Visual Application Language File How to open .ovx file
.ow Free Pascal 1.0.x Object File How to open .ow file
.owc OutWit Catch Database How to open .owc file
.owg OutWit Gear Database How to open .owg file
.owl OWL Source Code File How to open .owl file
.owm OutWit XML Mashup File How to open .owm file
.owx OutWit Hub Automator File How to open .owx file
.oxps OpenXPS File How to open .oxps file
.oxt Apache OpenOffice Extension How to open .oxt file
.oxygene Oxygene Project File How to open .oxygene file
.oyx Approach Alternate Database Index How to open .oyx file
.oz Opera Job Management Compressed File How to open .oz file
.ozb MU Online Image File How to open .ozb file
.ozj MU Online Image File How to open .ozj file
.ozocode Ozobot Program How to open .ozocode file
.ozt MU Online Image File How to open .ozt file