M4A to MP3 Converter
Convert an Apple M4A/AAC audio file to universally-playable MP3, free and entirely in your browser.
What is M4A?
M4A is the AAC-encoded audio container that Apple devices, GarageBand, iTunes/Apple Music, and voice memo apps default to. It’s already compressed and generally sounds as good as or better than MP3 at the same bitrate, but it’s less universally supported.
Why convert M4A to MP3?
MP3 is the one audio format that plays without question on nearly every device, app, and website — older car stereos, budget MP3 players, and some web uploaders don’t accept M4A at all. Converting M4A to MP3 trades a small amount of quality for maximum compatibility.
How to convert M4A to MP3
- Drop your M4A file. Drag and drop a M4A file, or click to browse. First use loads the ffmpeg.wasm engine (~31 MB, cached in your browser after).
- Confirm output is MP3. This page pre-selects MP3 as the output format — change it in the format picker if you’d rather export something else.
- Set quality and convert. Pick a quality or bitrate preset, then click Convert. Processing runs locally on your device and typically finishes in well under a minute for short files.
- Download. Click Download to save your MP3 file. Nothing was ever uploaded to a server.
Your file never leaves your browser — conversion runs locally via ffmpeg.wasm, not on a server.
Use Cases
- Make an iPhone voice memo (M4A) playable on a device that rejects it
- Convert an Apple Music/GarageBand export for a platform that only accepts MP3
- Fix an M4A file that a web form or car stereo refuses to load