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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
M3U8 - Extension Details
Date Added: January 01, 1970
File Extension:  .M3U8
Description 1: .M3U8 file extension is linked with The Unicode Version of M3U Playlist File. This file represents the Unicode M3U file which may include UTF8 Unicode characters. M3U file is the abbreviation of "MP3 URL. It carries MP3 playlist and other video or audio files. It lists the locations of media files in plain text format. Winamp was the first application which utilized M3U files, but nowadays it is utilized by various media players. M3U files contain references only and not the actual media files.
File Type:   Settings File
Mode: Binary
Program(s) to Open:  Windows: Apple iTunes, NullSoft Winamp, RealNetworks RealPlayer, Roxio Easy Media Creator, VLC Media Player; Mac: Apple iTunes, RealNetworks RealPlayer, VLC Media Player; Unix: VLC Media Player, XMMS
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