Sorted alphabetically: O


File extension The full name of the file Category

O file extension

Compiled Object File

Developer Files

OAB file extension

Offline Address Book

Data Files

OAM file extension

Adobe Edge Animate Widget File

Web Files

OAR file extension

OpenSimulator Archive

Compressed Files

OB! file extension

Orbit Downloader Incomplete Download

Misc Files

OBB file extension

Android Opaque Binary Blob File

Data Files

OBD file extension

Office Binder Document

Data Files

OBI file extension

Outlook RSS Subscription File

Settings Files

OBJ file extension

Wavefront 3D Object File

3D Image Files

OBML file extension

Opera Mini Saved Web Page

Web Files

OBP file extension

Bryce Object File

3D Image Files

OBT file extension

Openbox Theme File

Settings Files

OBW file extension

Superior Drummer Sounds File

Audio Files

OBZ file extension

Compressed 3D Object File

3D Image Files

OC3 file extension

openCanvas 3 Event File

Raster Image Files

OC4 file extension

openCanvas 4 Event File

Raster Image Files

OC5 file extension

openCanvas 5 Event File

Raster Image Files

OCA file extension

Custom Control Library Type File

Developer Files

OCC file extension

Oceanic DataPool File

Data Files

OCD file extension

OCAD Map File

GIS Files

OCE file extension

Open Catalog Extension Connection File

Settings Files

OCI file extension

openCanvas Image

Raster Image Files

OCR file extension

FAXGrapper Fax Text File

Text Files

OCT file extension

Radiance Octree File

3D Image Files

OCTEST file extension

Xcode Objective-C Unit Test Bundle

Developer Files

OCX file extension

ActiveX Control

Developer Files

OD file extension

Mascopt Graph Request File

Data Files

ODB file extension

OpenDocument Database

Database Files

ODC file extension

Office Data Connection File

Settings Files

ODF file extension

OpenDocument Formula

Misc Files

ODG file extension

OpenDocument Graphic File

Vector Image Files

ODI file extension

OpenDocument Image

Raster Image Files

ODIF file extension

Open Document Interchange Format

Text Files

ODL file extension

Object Description Language File

Developer Files

ODM file extension

OverDrive Media File

Audio Files

ODO file extension

Online Operating System Write Document

Text Files

ODP file extension

OpenDocument Presentation

Data Files

ODS file extension

OpenDocument Spreadsheet

Spreadsheet Files

ODT file extension

OpenDocument Text Document

Text Files

ODX file extension

BizTalk Server Orchestration File

Data Files

OEACCOUNT file extension

Windows Mail Account File

Data Files

OEB file extension

Outlook Express Backup Wizard File

Backup Files

OEM file extension

OEM Setup File

Settings Files

OEX file extension

Opera Extension

Plugin Files

OFC file extension

Open Financial Connectivity File

Data Files

OFF file extension

Object File Format

3D Image Files

OFL file extension

Ots File List

Text Files

OFM file extension

Melco Embroidery File

Data Files

OFR file extension

OptimFROG Audio File

Audio Files

OFT file extension

Outlook File Template

Data Files

OFX file extension

Open Financial Exchange File

Data Files

OGA file extension

Ogg Vorbis Audio File

Audio Files

OGF file extension

S.T.A.L.K.E.R. Model File

3D Image Files

OGG file extension

Ogg Vorbis Audio File

Audio Files

OGM file extension

Ogg Media File

Video Files

OGNC file extension

Dynamic Web Page

Web Files

OGS file extension

Origons Movie Data File

Data Files

OGV file extension

Ogg Video File

Video Files

OGX file extension

Ogg Vorbis Multiplexed Media File

Video Files

OGZ file extension

Cube 2 Map File

Game Files

OKT file extension

Oktalyzer Module

Audio Files

OLA file extension

Online Access File

Layout Files

OLB file extension

OLE Object Library

Misc Files

OLD file extension

Backup File

Backup Files

OLK file extension

Outlook Address Book File

Data Files

OLK14CATEGORY file extension

Outlook Category File

Data Files

OLK14CONTACT file extension

Outlook Contact File

Data Files

OLK14EVENT file extension

Outlook Calendar Event File

Data Files

OLK14GROUP file extension

Outlook Group File

Data Files

OLK14MAILACCOUNT file extension

Outlook Mail Account File

Data Files

OLK14MESSAGE file extension

Outlook Message File

Data Files

OLK14MSGSOURCE file extension

Outlook Email Message Data File

Data Files

OLK14NOTE file extension

Outlook Note File

Data Files

OLK14PREF file extension

Outlook Preferences File

Settings Files

OLK14SIGNATURE file extension

Outlook Signature File

Data Files

OLK14TASK file extension

Outlook Task File

Data Files

OLM file extension

Mac Outlook Database File

Data Files

OLT file extension

Orbit Downloads List

Data Files

OMA file extension

Sony OpenMG Music File

Audio Files

OMCS file extension

Office Manager Access File

Data Files

OMF file extension

Open Media Framework File

Audio Files

OMG file extension

OpenMG Audio File

Audio Files

OMO file extension

OMake Object File

Developer Files

OMOD file extension

Oblivion Mod Archive

Game Files

OMP file extension

Office Manager Document Archive

Data Files

OMX file extension

OtsAV Media Library Information File

Audio Files

OND file extension

Lotus Notes Encapsulated Memo File

Data Files

ONE file extension

OneNote Document

Data Files

ONEPKG file extension

Microsoft OneNote Package File

Backup Files

ONETOC2 file extension

Microsoft OneNote Table of Contents File

Settings Files

ONT file extension

theWord Bible Text Module

Data Files

ONTX file extension

theWord Encrypted Bible Text Module

Data Files

OO3 file extension

OmniOutliner 3 File

Data Files

OOK file extension

Arachne Batch Script

Misc Files

OPD file extension

OmniPage Document

Layout Files

OPDOWNLOAD file extension

Opera Partially Downloaded File

Misc Files

OPENBSD file extension

OpenBSD Readme File

Text Files

OPF file extension

Open Packaging Format File

eBook Files

OPJ file extension

OrCAD Project File

CAD Files

OPLC file extension

Nokia Operator Logo File

Raster Image Files

OPML file extension

Outline Processor Markup Language File

Web Files

OPS file extension

Office Profile Settings File

Settings Files

OPT file extension

Options File

Settings Files

OPTIONS file extension

SE-SOFT Configuration File

Settings Files

OPTS file extension

Linux Configuration Options File

Settings Files

OPUS file extension

Opus Audio File

Audio Files

OPX file extension

OrgPlus Org Chart

Data Files

OQY file extension

Excel OLAP Query File

Database Files

OR2 file extension

Lotus Organizer 2 File

Data Files

OR3 file extension

IBM Lotus Organizer 97 File

Data Files

OR4 file extension

IBM Lotus Organizer 97 GS File

Data Files

OR5 file extension

Lotus Organizer 5 File

Data Files

OR6 file extension

Lotus Organizer 6 File

Data Files

ORA file extension

Oracle Database Configuration File

Database Files

ORC file extension

Voyetra Digital Orchestrator File

Audio Files

ORDEREDTEST file extension

Visual Studio Ordered Test File

Developer Files

ORE file extension

Ore Executable File

Executable Files

ORF file extension

Olympus RAW File

Camera Raw Files

ORG file extension

Lotus Organizer File

Data Files

ORI file extension

Original File

Backup Files

ORIG file extension

Original File

Backup Files

ORT file extension

Rich Text Editor Document

Text Files

ORV file extension

Oracom Video File

Video Files

ORX file extension

RadiantOne VDS Database Schema

Database Files

OS file extension

ObjectScript Source File

Developer Files

OSAX file extension

AppleScript Scripting Addition

Plugin Files

OSB file extension

OpenStreetMap Binary Map File

GIS Files

OSC file extension

OpenStreetMap Change File

GIS Files

OSDX file extension

Search Connector Description File

Settings Files

OSK file extension

Osu! Skin File

Game Files

OSM file extension

OpenStreetMap Map File

GIS Files

OSP file extension

OpenShot Project File

Video Files

OSR file extension

Osu! Replay File

Game Files

OSS file extension

Microsoft Outlook Saved Search File

Settings Files

OST file extension

Outlook Offline Folder File

Misc Files

OSU file extension

Osu! Script

Game Files

OSX file extension

PowerPC Executable File

Executable Files

OSZ file extension

Osu! Beatmap File

Game Files

OT file extension

theWord Old Testament Text Module

Data Files

OTA file extension

OTA Bitmap Image

Raster Image Files

OTB file extension

Nokia Over The Air Bitmap Image

Raster Image Files

OTC file extension

OpenDocument Chart Template

Misc Files

OTF file extension

OpenType Font

Font Files

OTG file extension

OpenDocument Graphic Template

Vector Image Files

OTH file extension

OpenDocument HTML Template

Web Files

OTI file extension

OpenDocument Image Template

Raster Image Files

OTL file extension

NoteTab Outline File

Data Files

OTLN file extension

Opal Outline File

Data Files

OTM file extension

Outlook Macro File

Executable Files

OTP file extension

OpenDocument Presentation Template

Data Files

OTRKEY file extension

OnlineTvRecorder Encoded Video File

Video Files

OTS file extension

OpenDocument Spreadsheet Template

Spreadsheet Files

OTT file extension

OpenDocument Document Template

Text Files

OTX file extension

theWord Encrypted Old Testament Text Module

Data Files

OTZ file extension

OpenLP Theme File

Settings Files

OUT file extension

Output File

Data Files

OV2 file extension

TomTom Points of Interest Database

GIS Files

OVA file extension

Open Virtual Appliance

Data Files

OVE file extension

Overture Musical Score

Audio Files

OVF file extension

Open Virtualization File

Data Files

OVL file extension

Rollercoaster Tycoon 3 Data File

Game Files

OVP file extension

The Overlay Maker Package File

Vector Image Files

OVPN file extension

OpenVPN Configuration File

Settings Files

OVR file extension

The Overlay Maker Overlay File

Vector Image Files

OVW file extension

Logic Pro Overview File

Audio Files

OW file extension

Free Pascal 1.0.x Object File

Developer Files

OWC file extension

OutWit Catch Database

Database Files

OWG file extension

OutWit Gear Database

Misc Files

OWL file extension

OWL Source Code File

Developer Files

OWM file extension

OutWit XML Mashup File

Misc Files

OXPS file extension

OpenXPS File

Layout Files

OXT file extension

Apache OpenOffice Extension

Plugin Files

OXYGENE file extension

Oxygene Project File

Developer Files

OYX file extension

Approach Alternate Database Index

Backup Files

OZ file extension

Opera Job Management Compressed File

Compressed Files