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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
OMA - Extension Details
Date Added: January 01, 1970
File Extension:  .OMA
Description 1: Files with the .OMA extension refer to music files that are saved in the proprietary ATRAC (Adaptive Transform Acoustic Coding) format of Sony. An OMA file may include DRM copy protection, which helps in preventing the file from being opened and played on various unauthorized computer systems or devices. OMA files allowed for the distribution of music via the Sony CONNECT Music Store (discontinued March 2008).
File Type:   Audio file
Mode: Binary
Program(s) to Open:  Windows: Sony SonicStage
Common:
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