Convert WebM to MP4
Free, fast WebM-to-MP4 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 WebM and MP4 formats
WebM. WebM is an open, royalty-free video format optimised for the web.
MP4. MP4 is the most widely-supported video container, ideal for sharing and streaming.
Frequently asked questions
How do I convert WebM to MP4?
Drop your WebM files into the box above and click Convert. The MP4 file is generated instantly and ready to download.
Will the quality stay the same?
MP4 keeps full quality, so your converted file looks identical to the original.
Is WebM to MP4 conversion free?
Completely free, with no sign-up, watermarks or file-size paywalls.