Convert AAC to MP3
Some players and car stereos will not open a .aac file. Convert it to MP3 on your own computer, without uploading it.
- Never uploaded
- No size limit
- No sign-up
- Free
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Quick answer: To convert AAC to MP3, drop the .aac file into the tool at the top of this page and press "Convert to MP3". You get an MP3 that plays on any phone, computer or car stereo. It happens in your browser, so the file is never uploaded. It is free, with no sign-up and no file size limit.
Updated
How it works
- Drop your audio fileM4A, WAV, FLAC, OGG and more, any length. It stays on your computer.
- Pick the quality"Very good" suits speech and most music; "Best" for music you care about.
- Download the MP3Plays on every phone, computer, car stereo and audio editor.
Where .aac files come from
Recorders, some phones, radio and stream recordings and downloaded audio are saved as plain .aac files. If your file ends in .m4a instead, use M4A to MP3; for how the two formats compare, see AAC vs MP3.
Size and quality
AAC and MP3 are both compressed, so converting cannot add detail. Our one-minute .aac recording was 0.74 MB and its MP3 at "Very good" 1.4 MB. Pick "Best" for music.
Measured, not promised
Measured on 21 Oct 2026 in Chrome on a 2019 Intel MacBook (an older laptop) with a one-minute spoken .aac file. Newer computers are faster; real files vary. More results.
Why your audio never leaves your computer
Your audio is converted by your own computer, inside this tab, and never uploaded. That is why there is no length limit and no sign-up. How it works.
Questions
Does it work for .m4a too?
Yes, but M4A to MP3 has help for those files.
Will the MP3 play everywhere?
MP3 plays on practically every phone, computer, player and car stereo that reads audio files.
Can I convert several files at once?
Yes. Choose or drop several files together. They are converted one after another with the same settings, and you can download each one or all of them in one ZIP.
Is my file uploaded?
No. It is converted inside this browser tab and saved straight back to your computer.
Can I use a video file?
Yes. Drop a video and you get its sound.