FREE TOOLS · CONVERT
MP4 to WebM
Turn an MP4 or MOV into a WebM in your browser, a GIF into a transparent WebM, or a WebM back into an MP4.
Everything runs in your browser with WebCodecs. Nothing is uploaded.
Need a character that moves on any background?
- Free
- No sign-in
- Runs in your browser
How it works
- 01
Drop a video
An MP4, MOV or WebM up to 500 MB, or an animated GIF.
- 02
Pick a quality
High keeps the most detail. Small makes the lightest file.
- 03
Download it
A WebM with VP9 and Opus sound, or an MP4 with H.264.
Transparent video of your own mascot
Masko Studio animates your mascot with a transparent background and exports it as WebM, HEVC and GIF.
THE LITTLE DETAILS
A few questions.
How do I convert MP4 to WebM?
Drop the MP4 here and press Convert. Your browser encodes the picture to VP9 and the sound to Opus with WebCodecs. Nothing is uploaded.
Can a WebM have a transparent background?
Yes. A VP9 WebM can carry an alpha channel: a transparent video. A GIF, APNG or animated WebP dropped here becomes a WebM with its transparency kept.
How do I convert WebM to MP4?
Pick WebM to MP4 and drop the WebM. The MP4 uses H.264, which plays everywhere. MP4 has no transparency; for a transparent video on Apple devices, use HEVC.
Why does my file have no sound?
Your browser could not encode the sound for that format, so it was left out and the page said so. Try Chrome or Edge on a computer.
Is my video uploaded?
No. It is converted in your browser, so even a 500 MB file stays on your computer.
