Convert MP4 to MP3 offline

Convert local MP4 files to MP3 files offline by JavaScript in your web browser without any software downloads or file uploads!






OUTPUT FILES:
# File Name File Size Actions
How to convert MP4 to MP3 offline

Choose local MP4 files, choose "MP3" as target audio format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. File size can be up to 2GB. Please note this offline audio converter only works in web browsers that support new technologies such as WebAssembly, Shared Array Buffer and Site Isolation.

 

Name MP4 MP3
Full name MPEG-4 Part 14 MPEG-1 or MPEG-2 Audio Layer III
File extension .mp4, .m4a, .m4p, .m4b, .m4r, .m4v .mp3
MIME video/mp4 audio/mpeg, audio/MPA, audio/mpa-robust
Developed by International Organization for Standardization Fraunhofer Institute
Type of format Media container Digital audio
Introduction MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.
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