M4A to MP3 converter
Convert M4A to MP3 in seconds, free and unlimited. No upload, no sign-up, no watermark: your audio never leaves your device.
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Quick answer: To convert M4A to MP3, add the M4A file to the iHateFiles M4A to MP3 converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. MP3 is the format that plays on everything, including hardware old enough to vote.
When an M4A will not play
M4A is what iPhone voice memos and many Apple apps produce. It usually sounds a little better than MP3 at the same bitrate, and it is less welcome in old car stereos, some players and upload forms.
Both are lossy, so this is a second round of compression. Use 192 kbps or more for music. Songs bought with copy protection (usually .m4p) cannot be converted by anything like this.
Should you convert M4A to MP3?
Do this when MP3 plays somewhere M4A does not. It is a second round of lossy compression, so set the bitrate at or above the original.
Both M4A and MP3 are lossy
M4A (AAC) has already discarded some of the sound, and MP3 (MPEG-1 Layer III) will discard a little more. The MP3 encoder works from the M4A, not the original recording, so pick a bitrate at or above the source. A lower one saves space and costs quality you cannot get back.
Where the MP3 will play
MP3 plays on everything, including car stereos and hardware twenty years old.
M4A and MP3 side by side
| M4A | MP3 | |
|---|---|---|
| Inside the file | AAC | MPEG-1 Layer III |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| One minute of stereo | 1 to 1.9 MB | 1 to 2.4 MB |
| Plays on | Apple devices, Android, browsers and most modern players | everything, including car stereos and hardware twenty years old |
| Here | Read and write | Read and write |
What usually goes wrong
About the M4A. M4A, M4B, M4R and AAC are largely the same thing with different extensions. Renaming usually works, though it is not something to rely on.
About the MP3. Converting an MP3 to another lossy format compounds the damage, because the second encoder is guessing at audio the first one already threw away.
How to convert M4A to MP3
- Add your M4A file. It is read from your disk and stays there.
- Check the settings. The output format is already set to MP3.
- Press convert and the MP3 file is saved back to your device.
MP3 converter: everything that converts to MP3
Questions
How do I convert M4A to MP3?
Open this page, add your M4A file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this M4A to MP3 converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to MP3 lose quality?
MP3 is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several M4A files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.