MTS to MP4 Converter
Make AVCHD camcorder clips play everywhere — without losing a pixel.
Free · No upload · No sign-up · No watermark
How to convert MTS to MP4
- 01
Open your MTS file
On the camera's card, the clips are in PRIVATE/AVCHD/BDMV/STREAM. Drop one in.
- 02
Keep MP4 selected
It's already chosen. Pick a part if you like.
- 03
Convert and download
The picture is copied and only the sound is converted, so it's quick.
Why use Cutlia for this
Lossless picture
AVCHD records H.264, which goes into the MP4 untouched — every pixel as the camera recorded it.
Sound for every device
The camcorder's Dolby Digital (AC-3) sound becomes AAC, which phones and editors play.
MTS and M2TS
Same format: M2TS is the name on computers and Blu-ray, MTS on the camera's card.
Frequently asked questions
Is 1080i video deinterlaced?
No: the H.264 picture is copied untouched, so interlaced video stays as it was recorded. Players deinterlace it as they play.
Why won't MTS files play on my phone or Mac?
MTS is a broadcast-style container most apps don't open, and its AC-3 sound often isn't supported. MP4 with AAC fixes both.
Is my video uploaded to a server?
No. Cutlia processes your video directly in your browser using WebAssembly and your device's hardware. The file never leaves your computer or phone, so it stays completely private.
Is it really free?
Yes. Cutlia is free to use with no account, no trial and no watermark on your export. The site is paid for by the ads on it, and your files never leave your device.
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Each is this converter with the format already picked — and it still opens any video.