MP3 to M4A
Drop an MP3 file and get M4A, for the app, device or editor that needs it.
Your file stays on your device. Nothing is uploaded.
MP3 to M4A in three steps
Drop your MP3
Up to 500 MB.
Convert
It's saved as AAC in an M4A file, at the bitrate you choose (128, 192 or 320 kbps).
Download the M4A
Ready to use.
MP3 and M4A, explained
MP3 is the format every phone, car and app plays. It's lossy: it drops the sounds people hear least to keep files small.
M4A is AAC audio in an MP4-style file, Apple's usual audio format (Voice Memos, GarageBand, iTunes). It sounds a little better than MP3 at the same size.
Both are compressed formats, so converting re-encodes the sound once. At a good bitrate the difference is hard to hear.
Frequently
Asked Questions
Does converting MP3 to M4A lose quality?
M4A is lossy, so a little. At 192 kbps or more it's hard to hear.
Will the M4A be bigger or smaller?
About the same, depending on the bitrate you pick.
How long does it take?
Seconds for most files: audio converts quickly, even in the browser.
Is my file uploaded?
No. It's processed in your browser, on your own device, and never leaves it.