🔒 Converts in your browser · files stay private

Convert MP4 to WebM

Drop your MP4 file into the box above (or click Choose Files), then click Convert and download your new WebM file. No account or software needed.

Convert MP4 to WebM online, free — no installation, no sign-up.

or drop files here to convert MP4 → WEBM

Or import from:

Max file size 1 GB. Browser-side conversions have no upload limit.

How to convert MP4 to WebM

Drop your MP4 file above or click Choose Files.

Your file is converted instantly in your browser — it never gets uploaded.

Grab your new WebM file — done.

MP4 is the most widely supported video container, playable virtually everywhere.

WebM is an open, royalty-free video format optimised for the web.

Drop your MP4 file into the box above (or click Choose Files), then click Convert and download your new WebM file. No account or software needed.

Yes — this converter is completely free with no watermarks and no sign-up.

Absolutely. This conversion runs entirely inside your browser, so your MP4 file never leaves your device.

You control the output. Use the advanced options (the gear icon) to set quality, and we preserve as much fidelity as the WebM format allows.