Convert MP4 to WebM
Make a WebM video for websites. WebM needs VP9 or VP8 video and Opus sound, so your browser re-encodes the file.
Files never leave your device
Drop your file here Processed on your device
How to use
- Choose or drop a MP4 file.
- It converts to WebM straight away. Bigger files take longer; keep the page open.
- Play it to check, then download.
Frequently asked questions
Does it work in every browser?
Chrome, Edge and Firefox can make WebM. Some Safari versions can’t; you’ll see a message if yours can’t.
Is my file uploaded anywhere?
No. ConvertRight runs entirely in your browser. Your file is processed on your own phone or computer and is never sent to a server.