Convert MP4 to WebM
Convert an MP4 video to WebM for browser playback and web publishing. Choose a video to get started.
Choose a video in the interactive tool
JavaScript is required for video processing
Common video formatsUp to 500 MB on desktopNo sign-up
How convert mp4 to webm works
Process
Choose an MP4 file and start the conversion. The video is encoded with VP8 and the audio is encoded with Opus at a compatible sample rate.
Result
A WebM file designed for modern browser playback and HTML video use.
Good to know
WebM conversion re-encodes the media. Processing time increases with duration and resolution, and output quality depends on the source.
Does WebM work in modern browsers?
Current Chrome, Firefox, Edge, and other modern browsers support WebM playback.
Will the WebM include audio?
Yes, when the MP4 contains a readable audio track.