MP4 to WebM

MP4 to WebM Converter

Convert MP4 videos to WebM in your browser for web pages, prototypes, and lightweight embeds.

WebM conversion workspace

Create a WebM export from an MP4 file.

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How it works

1 Select an MP4 video.
2 Convert it to WebM locally.
3 Download the WebM export.

FAQ

Is my file uploaded anywhere?

No. The conversion runs in your browser with WebAssembly, so the selected file stays on your device.

Why can conversion take a while?

Large videos need to be decoded and encoded locally. Keep the tab open while the browser finishes the export.

Does the tool add a watermark?

No. The exported file is watermark-free.

Why use WebM?

WebM can be useful for HTML video, web prototypes, and transparent delivery workflows.

Want professional polish?

The browser tools are great for quick format work. Aufzeichna's desktop app is built for polished screen recordings with smooth cursor motion, cinematic zoom, and export control.

Check out the desktop app