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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
M2V - Extension Details
Date Added: January 01, 1970
File Extension:  .M2V
Description 1: .M2V file extension is linked with MPEG2 Packetized Elementary Stream. This file contains videoonly related data. .M2V files are usually muxed or multiplexed the process audio data integration and other streams [i.e. subtitles] prior to use. .M2V files are created by demuxing or demultiplexing an existing MPEG2 or via conversion of another video format into MPEG2. .M2V file extension is frequently integrated with SFV Host files.
File Type:   Movie, video, multimedia file
Mode: Binary
Program(s) to Open:  Windows & Mac: Microsoft Windows Media Player; Real Networks RealPlayer
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