# Convert MP3 to M4A

Convert MP3 to M4A right in your browser — free, private, nothing is uploaded. One-click re-encode for compatibility.

MP3 is the most widely supported audio format there is — a lossy codec that shrinks audio to a fraction of its uncompressed size and plays on virtually anything with a speaker.

M4A wraps AAC audio in an MPEG-4 container — the format iTunes and Apple Music use. AAC squeezes better quality than MP3 out of the same bitrate, at the cost of slightly narrower support.

Converting MP3 to M4A is a compatibility move: both formats are lossy, so the goal isn't quality — it's producing a file that fits Apple devices and small high-quality files. Expect the sound to stay essentially the same, with a small second round of encoding loss.

## Run it

- **Web (M4A preselected):** https://gizza.ai/tools/audio-convert/?format=m4a
- **CLI:** `gizza tool audio-convert 'url=https://example.com/input.mp3' 'format=m4a'`
- **Parent tool docs:** https://gizza.ai/tools/audio-convert/index.md