Computer file extensions - O
Updated: 12/26/2023 by Computer Hope
Below is a listing of each of the different file extensions that begin with the letter "O." If you are looking for a file extension that starts with a different letter, click the corresponding beginning letter below.
| O | |
|---|---|
| .OBJ | Universal format for 3-D models, textures, materials, and associated data. |
| .OCA | Control typelib cache. |
| .OCX | OLE (Object Linking and Embedding) control extension. |
| .ODT | Document file created in LibreOffice and OpenOffice Writer word processor program. |
| .OGA | OGG OggPCM or Vorbis sound file. |
| .OGG | OGG OggPCM or Vorbis sound file. OGG OggUVS, Tarkin, or Theora video file. OGG Annodex, CMML, OggKate, or Writ text file. |
| .OGM | An Ogg Media File, OGM files are movie files. |
| .OGV | OGG Tarkin or Theora video file. |
| .OLB | Object library. |
| .OLD | Used for backups of important files in case they are improperly updated or deleted. |
| .OLE | Object Linking and Embedding object file. |
| .OLI | Olivetti text file. |
| .OPUS | OGG Opus sound file. |
| .ORF | Digital camera RAW file format. |
| .ORI | Original file. |
| .OST | A Microsoft Outlook offline data file. |
| .OTL | A Z-soft type foundry font file and other program files template file. |
| .OVA | Archive file containing files for virtualization software, like VMware Workstation. |
| .OXPS | Document file created using the Microsoft open XPS (XML Paper Specification) format. |