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File Extension Database

Find what program a filetype belongs to in our searchable File Extension Database.
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File Extension Database - O

File Extension Database 

The Cyber Tech Help File Extension Database is a searchable A-Z of file extensions.

To use the File Extension Database simply click on the first letter of the extension you are looking for.


Your Results are as follows :

  • .O - Object file (unix - Atari - GCC)
  • .O$$ - Outfile (Sprint)
  • .OAZ - Fax (NetFax Manager)
  • .OB - Object cut/paste file (IBM LinkWay)
  • .OBD - MS Office Binder
  • .OBJ - Object code (Intel Recolatable Object Module)
  • .OBR - Object browser data file (Borland C++)
  • .OBS - Script (ObjectScript)
  • .OBV - Visual interface (ObjectScript)
  • .OCA - Control Typelib Cache
  • .OCF - Object Craft File (Object Craft)
  • .OCM - AOL Advertising Control filesInternet Odyssey 2 Update
  • .OCP - Advanced Art StudioOffline Commander Project file
  • .OCR - Incoming fax transcribed to text (FAXGrapper)
  • .OCT - Radiance Octree Format
  • .OCX - OLE custom control
  • .ODF - Open Document InterchangeBattleZone Cartographers Guild fileStar Trek Armada Ship/Structure Infomation
  • .ODL - Type library source (Visual C++)
  • .OEB - Outlook Express Backup Wizard
  • .OFC - Open Financial Connectivity file
  • .OFD - Form definition (ObjectView)
  • .OFF - Object File Format vector graphics
  • .OFM - Adobe font
  • .OFT - MS Outlook Item Template
  • .OFX - Olicom Fax Open Financial Exchange file
  • .OGG - Ogg Vorbis Codec Compressed WAV file
  • .OGM - Ogg Vorbis Compressed Video file
  • .OKT - Music (Oktalizer)
  • .OLB - Object library (VAX)
  • .OLD - Backup file
  • .OLE - Object Linking and Embedding Object
  • .OLI - Text file (Olivetti)
  • .OMG - OpenMG Jukebox
  • .OMS - Briggs Softworks Order MavenMacintosh MP3 Music FormatOmega Downloader Configuration file
  • .OND - Lotus Notes-related file
  • .OOM - Swap file (Shroom)
  • .OPD - Omnipage file
  • .OPF - Flip Album file
  • .OPL - Psion Organiser Programming Language Source file
  • .OPN - Active options (Exact)
  • .OPT - Optimize support file (QEMM)
  • .OPW - Organization chart (Org Plus for Windows)
  • .OPX - Inactive options (Exact)
  • .OR2 - Lotus Organizer 2 file
  • .OR3 - Lotus Organizer 97 file
  • .OR4 - Lotus Organizer file
  • .OR5 - Lotus Organizer file
  • .ORA - Parameter file (Oracle)
  • .ORG - Calendar file (Lotus Organizer)
  • .OSD - Open Software Description file
  • .OSS - MS Office Saved Search
  • .OST - Microsoft Outlook Offline file
  • .OTF - Open Type Format
  • .OTL - Outline font description (Z-Soft Type Foundry)
  • .OTX - Text file (Olivetti Olitext Plus)
  • .OUT - Output file
  • .OV1 - Overlay file (part of program to be loaded when needed)
  • .OV2 - Overlay file (part of program to be loaded when needed)
  • .OVD - Datafile (ObjectVision)
  • .OVL - Overlay file (part of program to be loaded when needed)
  • .OVR - Overlay file (part of program to be loaded when needed)
  • .OVW - Cool Edit Pro OverviewfileCubase .WAV File ImageDIANA Overview file
  • .OWS - Web Studio 2 Project file

You searched for the letter O.