Convert M4A to MP3
The output format is already set to MP3: drop your M4A files and download them in a format that any player can open.
Drop your files hereTap to choose your files
or click to chooseMP3, WAV, OGG, M4A, FLAC, MP4 · up to 20 files
Processed on your device: nothing is uploaded
Your browser is too old for this tool
It can’t read or create audio. Update Chrome, Edge, Firefox, or Safari and try again.
Your browser doesn’t include audio WebCodecs, so its own decoder is used. It works the same with MP3, WAV, M4A, and FLAC; very long audio may take longer, and OGG isn’t available.
You can drag more files into the box above.
Output format
To create M4A (AAC), your browser downloads a ≈ 250 KB encoder once, only if it doesn’t include one. On a mobile connection this can take a few seconds.
More options
Raises or lowers the volume so the loudest point ends up close to the maximum, without distorting.
This file has several audio tracks (for example, different languages).
Trim (optional)
Leave it empty to start from the beginning.
Leave it empty to go to the end.
File details (optional)
Conversion complete
How to use it
- Drop your audio files into the box or select them from your device. Videos work too: their audio is used. You can load up to 20 at once.
- Choose the output format and the quality. Below, you will see how large the result would be before you start.
- If you need to, open “More options” to change the sample rate, switch to mono, normalize the volume, trim the start and end, or add a title and artist.
- Select “Convert audio,” listen to the result, and download it. If you converted several files, they download together in a ZIP.
Frequently asked questions
Why convert M4A to MP3?
M4A (AAC) is Apple’s format and sounds very good, but some players, cars, and older devices can’t open it. MP3 is the most compatible format of all.
Is quality lost?
Going from one lossy format to another loses a little. At 192 kbps or higher the difference is hard to notice. Keep the original M4A just in case.
Does it work with iPhone audio?
Yes. The M4A and AAC files an iPhone records can be loaded and converted. The conversion happens on your device, without sending the recording to any server.
M4A and MP3: compatibility
M4A uses the AAC codec, which sounds a bit better than MP3 at the same size, and it is Apple’s format. Its weak point is compatibility: some older devices and programs don’t recognize it. MP3, on the other hand, plays everywhere.
How to do it
The output format is already set to MP3. Drop your M4A files, choose the quality, and download. If your browser doesn’t include an MP3 encoder, a small module is downloaded once and runs only on your device. For speech, OGG to MP3 at a low bitrate works well; for other formats, open the audio converter.
Updated on October 1, 2026