How do I convert MP3 to M4A?

Upload your MP3 file using the box above, confirm M4A as the output format, then select Convert. The converted file is ready to download as soon as processing finishes — usually in a few seconds.

Is converting MP3 to M4A free?

Yes, and there is nothing to sign up for. Every conversion is free, there is no paid tier, and the limits are the same for everyone.

Will the quality change when converting to M4A?

M4A uses lossy compression, so some data is discarded to keep the file small. The default quality setting is tuned to be visually or audibly transparent for most material, and you can raise it in the conversion settings.

What happens to my file afterwards?

The uploaded file is deleted as soon as the conversion completes, and the converted file is removed automatically once its retention window ends. Download links are signed and expire within minutes.

mp3m4a

Convert MP3 to M4A

Free online converter for MP3 files. AAC audio in an MP4 container. Nothing to install, no watermark, and every file is deleted automatically.

Drag and drop your files

Upload a MP3 file to convert it to M4A. Up to 200 files at once, 10 GB each.

Free · up to 200 files · 10 GB each · files deleted automatically after 168 hours.

About MP3 and M4A

MP3

The most widely compatible lossy audio format.

audio/mpeg

M4A

AAC audio in an MP4 container.

audio/mp4

Other MP3 conversions

mp3 to wav
mp3 to flac
mp3 to ogg
mp3 to opus
mp3 to aac

Other ways to get M4A

wav to m4a
flac to m4a
ogg to m4a
opus to m4a
aac to m4a
mp4 to m4a
webm to m4a
mkv to m4a