Convert MTS to M4A
Extract the audio from MTS videos and save it as M4A — ideal for high-quality music and voice recordings for Apple and Android devices.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MTS to M4A
- 1
Tap Choose files and select one or more MTS files (or drag them in).
- 2
Check that M4A is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your M4A downloads automatically. Converting several files? Grab them all as a ZIP.
MTS vs M4A
Only the sound is kept — the picture is dropped, so the M4A file is far smaller than the MTS video.
| MTS | M4A | |
|---|---|---|
| Full name | AVCHD Video | MPEG-4 Audio (AAC) |
| Type | Video | Audio |
| Compression | Lossy | Lossy |
| Developed by | Sony & Panasonic | Apple / MPEG |
| Introduced | 2006 | 2001 |
| Plays on iPhone | ✕ No | ✓ Yes |
| Plays on Android | ✕ No | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app | ✓ Yes |
About MTS and M4A
MTS: MTS/M2TS files come from Sony, Panasonic and Canon HD camcorders (AVCHD). They are high quality but hard to play on phones.
M4A: M4A is an MPEG-4 container holding AAC audio. It sounds better than MP3 at the same size and is the default format for iPhone voice memos, Apple Music downloads and many Android recorders.
Frequently asked questions
How do I convert MTS to M4A on my phone?
Will converting MTS to M4A reduce quality?
Can I convert only part of the MTS?
Is this MTS to M4A converter free?
Are my files uploaded to a server?
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