What is MP4 File Extension?


MP4 is a digital multimedia file format which is also considered MPEG-4 Part- 14 or MPEG-4 AVC. It is one of the oldest file formats which has been introduced to save both audio and video data. The file format is also known as MPEG which stands for Motion Pictures Expert Group.


The file format is counted under video files category.

Supportive Apps

It is supported by multiple apps which show its flexibility.

  • mp4
  • MP4.6
  • Files
  • File
  • Nullsoft Winamp
  • Roxio Creator NXT Pro 3
  • KMPlayer
  • VLC media player
  • Windows Media Player 12
  • Microsoft Zune portable media player
  • Media Player Classic
  • MPlayer
  • QuickTime Player
  • XBMC Media Center
  • Apple QuickTime Player
  • Apple iTunes


It has been developed in 1998 by ISO.

MIME Types

It has not many MIME type.

RFC 4337


It has two signatures.

The ASCII Code signature is 4ISO Base Media file (MPEG–4) v1

The Hexadecimal signature is 00 00 00 14 66 74 79 70 and 69 73 6F 6D

How to Access MP4 File Extension

It is a flexible file format support multiple apps. Users can open the file on many apps that support video files such as VLC and MX Player.