WebM – Web Media Container
WebM is optimized for HTML5 video on the web. It often produces efficient files with VP9 or AV1 video and Opus audio.
WebM Converter →WebM Converter
Convert WebM videos online in your browser. Upload MP4, WebM, MOV, or MKV — pick an output format and download individually or as a ZIP.
From
to
To
Select your videos to convert
or drop MP4, WebM, MOV & MKV here (max 30 MB each)
Privacy
On your device only
Max size
30 MB per file
Speed
Multi-core when available
Format reference and conversion types
Format reference
Conversion types
Convert from WebM
Pick a target format to start a WebM conversion.
Conversion types
Convert to WebM
Pick a source format to convert into WebM.