How to convert M4A to MP3
- Choose the M4A files, or drop them on the page.
- Keep Format on MP3 and pick a bitrate.
- Select Convert to MP3.
- Download each MP3, or all of them as a ZIP.
Worked example
A voice memo named Memo 12.m4a becomes Memo 12.mp3. At 96 kb/s, 10 minutes of speech is about 7.2 MB.
Formats and limits
| Input | M4A, AAC |
|---|---|
| Output | MP3 |
| Limits | Up to 1 GB per file; 100 files per batch. |
| Engine | Mediabunny (WebCodecs) with MP3 and FLAC encoder extensions |
Limitations
- Converting from AAC to MP3 re-encodes the sound, so choose a bitrate at least as high as the original.
- Copy-protected .m4p files cannot be converted.
- Up to 1 GB per file and 100 files per batch.
Questions
Can I convert iPhone voice memos to MP3?
Yes. Voice memos are M4A files. Share or copy them to the device you are using, then choose them here.
Can copy-protected iTunes songs be converted?
No. Protected purchases (.m4p files) cannot be decoded in the browser.
Which bitrate should I use?
The default is 192 kb/s. For speech, 96 or 128 kb/s keeps files small; for music, choose 192 kb/s or more.
Privacy
Runs on your device. Files and text are processed in this browser tab and are not uploaded.
This page opens the Audio format converter ready for this task. See the privacy policy for how toolsdocks handles data.