Convert M4A to MP3
Runs locally in your browser via a WebAssembly build of ffmpeg. Your file is never sent to a server.
- Choose a .m4a file from your device.
- Click convert to MP3.
- Download the result.
Maximum file size: 100 MB. The first conversion loads a ~30 MB converter engine, once per visit. Nothing is uploaded - conversion runs on your device.
M4A vs MP3
M4A is Apple's default audio container, produced by Voice Memos, GarageBand and podcast exports. MP3 is the universal compressed audio format, supported by essentially every device and app.
Frequently asked
Why convert M4A to MP3?
M4A is Apple's default audio container, produced by Voice Memos, GarageBand and podcast exports. MP3 is the universal compressed audio format, supported by essentially every device and app. Converting between them is common when a file made for one use needs to work for the other.
Does this upload my file anywhere?
No. Conversion runs entirely on your device using a WebAssembly build of ffmpeg - the file never reaches a server.
Is there a file size limit?
Yes, 100 MB per file, to keep conversion reliable inside the browser.
Koldflux exports every clip in the right format automatically - no manual conversion step.
Automate this in Koldflux