WebM is an open, royalty-free format with excellent web support and good compression.

MP4 to WebM

Convert MP4 videos to the open WebM format.

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About MP4 to WebM

Turn MP4 files into WebM (VP8/Vorbis) video, great for the web and open-source workflows. Runs privately in your browser.

Open the MP4 to WebM tool and add your file. It's processed in your browser, never uploaded.
Adjust the available options to get the result you want.
Download the result. There's no sign-up, no watermark, and no size cap.

Why WebM?: WebM is an open, royalty-free format with excellent web support and good compression.

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