Convert MP4 to WebM
Free, fast MP4-to-WebM conversion.
Video and audio are processed with ffmpeg in your browser — large files are slow and use a lot of memory. Keep files under a few hundred MB for best results.
About the MP4 and WebM formats
MP4. MP4 is the most widely-supported video container, ideal for sharing and streaming.
WebM. WebM is an open, royalty-free video format optimised for the web.
Frequently asked questions
How do I convert MP4 to WebM?
Drop your MP4 files into the box above and click Convert. The WebM file is generated instantly and ready to download.
Will the quality stay the same?
WebM keeps full quality, so your converted file looks identical to the original.
Is MP4 to WebM conversion free?
Completely free, with no sign-up, watermarks or file-size paywalls.