MP4 to WebM Converter

WebM is an open format for video on the web. This free MP4 to WebM converter runs entirely in your browser, so your files are never uploaded.

MP4 is the most widely supported video container. WebM is an open web video format using VP8, VP9 or AV1.

How to convert MP4 to WebM: Choose your MP4 files, or drop them onto the converter. The output is already set to WebM. Adjust quality or size if you like. Convert and download your WebM files.

Is this MP4 to WebM converter free? Yes. It's free to use, with no sign-up and no watermark.

Are my files uploaded? No. The conversion runs in your browser, so your files never leave your device.

What changes when I convert MP4 to WebM? This tool encodes WebM with the VP8 codec.

Can I convert several MP4 files at once? Yes. Add as many files as you like and they're converted one after another.

• WebM to MP4
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