M4A to MP3 converter
Convert an M4A into an MP3 right here on the page. MP3 is the usual choice for music libraries and portable players. Your file never leaves your computer.
Need the other direction? Convert MP3 to M4A
How to convert M4A to MP3
- 1 Drop your M4A .m4a file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the MP3, or add more files and do the whole set in one go.
Why convert M4A to MP3
- Plays on every device, browser and stereo ever built.
- All relevant patents have expired, so it is free to use.
- Podcasts and spoken word audio.
- M4A: the extension does not tell you what is actually inside.
M4A compared with MP3
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | M4A | MP3 |
|---|---|---|
| File extension | .m4a | .mp3 |
| Compression | Lossy or lossless | Lossy |
| Typical file size | Depends on mode | Smaller |
| Introduced | 2001 | 1993 |
| Developed by | Apple / ISO | Fraunhofer IIS |
Quality and what changes
MP3 stores the same content under a different set of rules, so what matters here is compatibility rather than picture quality. Convert once from the best source you have rather than through a chain of intermediate files.
- One MP3 limitation to keep in mind: detail is thrown away, and converting again takes a little more.
Questions about M4A to MP3
Is my M4A file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your M4A is read straight from your own disk, converted on your machine and handed back as an MP3. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several M4A files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate MP3 downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.