Convert MP3 to M4A

No. The conversion runs entirely in your browser. The file never leaves your device – there is no server that could see it. Once the page has loaded, the tool even works offline.

MP3 is the universal lossy audio format. M4A is AAC audio in an MP4 container – the format of Apple Music and iTunes.

M4A is a lossy format. At 192 kbit/s the difference to the original is inaudible for almost everyone; choose 320 kbit/s if in doubt. Converting one lossy format into another loses a little more each time, so keep the original.

Text tags (title, artist, album, year) are carried over where the target format supports them – all formats except WAV do. Embedded cover art is dropped.

Audio is quick: a three-minute song converts in a few seconds once the engine (about 32 MB, loaded once per visit) is ready. Files up to 100 MB are accepted.