MP4 to M4A converter
To convert MP4 to M4A, drop your MP4 file in the box below. It converts straight away; press Download to save the M4A. It all happens in your browser, so your file stays on your device.
Convert to
Converted on this device, never uploaded
What changes
| MP4 to M4A | What happens |
|---|---|
| Sound | AAC copied as it is, so nothing is lost; other sound re-encoded as AAC |
| Speed | Seconds for a copy |
| Quality | Kept, or 96, 128 or 192 kbps when re-encoded |
| Trim | Choose the part to keep on the timeline |
| Where it happens | In your browser; the file is never uploaded |
How to convert MP4 to M4A
- Add your MP4. Drop the file in the box, or click to choose it. It becomes M4A straight away.
- Check the result. Look at the preview and the size. The defaults are right for most files.
- Download. Press Download to save the M4A.
Why M4A
Keep just the sound of a video as an M4A: small, plays on every phone and computer, and opens in iTunes and Apple Music.
Questions
Not by default. Most MP4 videos carry AAC sound, which is copied into the M4A unchanged.
Its sound is not AAC and this browser has no AAC encoder to convert it. Chrome, Edge and Safari have one; try WAV or OGG instead.
Yes. Turn on “Mono”; the sound is then re-encoded as AAC.
No. The conversion happens right in your browser, so your file stays on your device. There is no account to make, either.