Convert MP4 to M4A online in seconds — free, with no sign-up. M4A is lossy and ideal for Apple devices; converted to MP3 for universal playback. Your files are encrypted and deleted automatically after 24 hours.
MP4
MPEG-4 (H.264) — The universal video container — plays on virtually every device, browser and platform.
How to convert MP4 to M4A
- 1Upload your MP4 file
Click “Choose a file” or drag and drop your MP4 file onto the page — no sign-up or email needed.
- 2Convert to M4A
M4A is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your M4A file
Your M4A file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
MP4 vs M4A
| MP4 | M4A | |
|---|---|---|
| Full name | MPEG-4 (H.264) | MPEG-4 Audio |
| Type | Video | Audio |
| Compression | Lossy | Lossy |
| Best for | sharing and publishing video anywhere | Apple devices; converted to MP3 for universal playback |
Frequently asked questions
Does converting MP4 to M4A lose quality?
Both MP4 and M4A use compression, so re-encoding discards a little more data. For a single conversion the change is imperceptible to the ear; just avoid repeatedly re-converting the same file.
What's the difference between MP4 and M4A?
MPEG-4 (H.264) (MP4) is lossy and best for sharing and publishing video anywhere. MPEG-4 Audio (M4A) is lossy and best for Apple devices; converted to MP3 for universal playback. Convert MP4 to M4A when you need a audio for Apple devices.
Is the MP4 to M4A converter free?
Yes — converting MP4 to M4A is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my MP4 files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert MP4 to M4A on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert MP4 to M4A?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert MP4 files to?
Besides M4A, you can convert MP4 to AAC, AVI, FLAC, FLV, GIF, JPG and more — see the full list of MP4 conversions below.
Other conversions
Last updated July 2026