MP4 to WebM Converter

Convert MP4 video files to WebM format online. WebM is optimized for the web.

Drop your video file here, or click to browse

.MP4, VIDEO/MP4 supported

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About this tool

Convert MP4 video files to WebM format online. WebM is optimized for the web. All conversions happen directly in your browser using the Canvas API — your files are never uploaded to any server, ensuring complete privacy.

✅ Free to use, no sign-up required
✅ Files never leave your device
✅ Instant conversion
✅ Works on any browser and device