How can I convert MTS to MP4 on Windows 11?

Clipchamp. Since Windows 11 ships with Clipchamp pre-installed, it's a genuine "no download needed" option.

It is a free video editor built into Windows 11, owned by Microsoft. Since you're editing rather than just converting, it's technically repurposing an editor as a converter — but it works.

Why it's good for mts to mp4 conversion:

No install needed — it's pre-installed on Windows 11, so there's zero setup friction. CreatorStackClub

The free plan exports videos in up to 1080p resolution with no watermarks, and there's no time limit on videos and no restricted features for basic editing. ClipchampCreatorStackClub

Processing happens locally in the browser rather than requiring a software download, and it has a simple drag-and-drop timeline.

How to convert .mts to .mp4 on Windows 11 free:

1. Open Clipchamp (search it in the Start menu, or via clipchamp.com).

2. Sign in with a Microsoft account.

3. Create a new project → import your .mts file → drag it onto the timeline.

4. Click Export → choose MP4 (resolution up to 1080p on the free tier).