Add your files
Drop one MP4 or two hundred. Batch conversion is not a paid feature here.
Convert MP4 to M4A
Only the audio from a video is wanted, and none of the quality should be spent doing it.
Runs on your deviceFreeNo sign-upBatch supported
Audio is re-encoded on your device. The engine downloads once, then works offline.
Waiting for files/Engine: on-device/Network requests made: 0
What actually changes
MP4 and M4A are not the same picture in two wrappers.
The video track is removed and the existing AAC audio stream is copied into an M4A container without touching a single sample. It is nearly instant and completely lossless relative to the source.
Worth knowing first
This is the conversion people should be doing when they reach for MP3. M4A and MP4 are the same container family, which is why the audio can be copied rather than re-encoded, and why the result is better than an MP3 of the same file.
Questions
MP4 to M4A, answered
Will M4A play on my devices?
Every phone, browser and modern car system plays it. Only very old MP3 players and some legacy hardware do not.
Is M4A better than MP3?
At the same bitrate AAC is meaningfully better than MP3, and here it is better still because nothing is being re-encoded.
How to convert MP4 to M4A
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Choose your settings
MPEG-4 Audio is lossy, so the quality control decides the trade between size and fidelity.
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Download
Instant, because the file never went anywhere. Nothing expires, since nothing was stored.