Video Format Converter

Upload your video, download it as MP4, MOV, or WEBM.

This tool requires JavaScript to run the actual conversion in your browser. Please enable JavaScript to use it.

Video Format Converter

Upload your video, download it as MP4, MOV, or WEBM. Free, no sign-up, runs entirely in your browser.

How it works

Upload your video. MP4, MOV, WEBM, MKV, or AVI, up to 300MB.
Choose your target format. MP4, MOV, or WEBM.
Download the converted video. Entirely in your browser — larger videos take a little longer.

Why Stelluna

Free — no sign-up needed
Runs in Your Browser — your video never leaves your device
MP4 · MOV · WEBM — convert between the most common video formats

Frequently Asked Questions

Is it free?
Yes, no account needed.

Does my video get uploaded anywhere?
No, conversion runs entirely in your browser using your device's own video encoder.

Which formats are supported?
Output: MP4, MOV, WEBM. MKV and AVI are also accepted as input, up to 300MB.

Do I need to sign up?
No.

Why do some conversions fail?
Your browser may not support that target format's video encoder — try a different format or an up-to-date Chrome/Edge.