Convert an MP3 to the Apple M4A format for tidier iTunes libraries and better metadata.
Converting MP3 to M4A is most useful when you're tidying an iTunes or Apple Music library. M4A is what the Music app uses natively — it handles chapter markers, artwork, and metadata more cleanly than MP3, and it plays identically on every Apple device. Some Spotify / YouTube Music import flows also prefer M4A.
Both MP3 and M4A (AAC audio) are lossy, so converting between them adds a second lossy encode on top of the original. At 192 kbps and up, the quality cost is inaudible in practice — but if you have a choice, keep the original format and only convert when a destination demands it.
MP3 is the most compatible lossy audio format — 30+ years old, plays on literally everything from car stereos to podcast apps.
M4A is AAC audio in an MP4 container — the default format used by iTunes and Apple Music. Smaller than MP3 at the same perceived quality.
Drag a MP3 onto the converter above, or click the box to pick one from your device.
We've preselected M4A as the output format. Change it from the dropdown if you want a different target.
Click Convert and wait for the progress bar to finish. Download the M4A when it's ready.
Turn an M4A audio file from iTunes or Apple Music into an MP3 that plays on any device.
Convert an MP3 to uncompressed WAV for editing, mastering, or any workflow that needs PCM audio.
Convert raw AAC audio files to MP3 for maximum device compatibility — free, browser-only.