Convert MP3 to M4A offline

Convert local MP3 files to M4A 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 MP3 to M4A offline

Choose local MP3 files, choose "M4A" 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 MP3 M4A
Full name MPEG-1 or MPEG-2 Audio Layer III Audio-only MPEG-4
File extension .mp3 .m4a
MIME audio/mpeg, audio/MPA, audio/mpa-robust video/mp4
Developed by Fraunhofer Institute International Organization for Standardization
Type of format Digital audio Media container
Introduction 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. MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files.
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