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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
OGM - Extension Details
Date Added: September 09, 2008
File Extension:  .OGM
Description 1: .OGM is the file extension associated with the compressed video container format that employs Ogg Vorbis compression. This file format features an Ogg Vorbis video stream and audio. Files that contain only audio utilize the .OGG file extension. An OGM file may include switchable subtitles and be encoded using DivX, Theora, XvD or other codecstypes. This means in order to play the OGM file, a video player must be able to support the right codec.
File Type:   Video file
Mode: Binary
Program(s) to Open:  Windows: The Core Media Player, VideoLAN VLC media player, MPUI (MPlayer frontend for Windows), VLC Media Player Macintosh: MPlayer, VideoLAN VLC media player, VLC Media Player Unix: VideoLAN VLC media player
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