Convert m4a to mp3
Converted on your device. Files never leave this tab. Output tops out around 2 GB.
Nothing is uploaded
The converter runs inside this page. Cut your network after it loads and it still works.
No account, no daily limit
No sign-up, no daily limit, no watermark, no queue behind other people's files. Batch as many M4A files as you like.
Real MP3 output
Encoded by ffmpeg, the same library the command-line tools use — not a renamed extension.
About M4A
MPEG-4 Audio
An audio-only MPEG-4 file, the format iTunes and Apple Music use. It usually holds lossy AAC and sometimes lossless ALAC. Use it for iPhones, Macs and iTunes libraries, where it plays and tags natively.
About MP3
MPEG-1 Audio Layer III
A lossy audio format developed largely at the Fraunhofer Institute and standardized as part of MPEG-1 in 1993. Its patents expired in 2017, and typical bitrates run from 128 to 320 kbps. Use it when audio has to play everywhere: car stereos, old MP3 players, any phone or browser.