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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
WMA - Extension Details
Date Added: January 01, 1970
File Extension:  .WMA
Description 1: .WMA files are audio files that employ Windows Media compression to compress them. Microsoft developed this proprietary format. Like the .MP3 format, .WMA files allow for conversion to other formats that are more standardized. Use this format to play music from the Internet. Play WMA files on the Disney Mix Stick MP3 Player and Microsofts Zune portable music player. iPods on the other hand, are not able to play them.
File Type:   Audio file
Mode: Binary
Program(s) to Open:  Windows: Microsoft Windows Media Player, Nullsoft Winamp, Roxio Easy Media Creator, Web browser with Windows Media Player plugin Macintosh: Microsoft Windows Media Player, Web browser with Windows Media Player plugin
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