Runs 100% in your browser
Your data never leaves your device. zero uploads.
Convert a WebM video to MP4 locally using a browser-based video workspace.
Initializing...
Prepare a WebM recording for a workflow that expects MP4. The browser loads a conversion runtime and processes the selected file on your device. Keep the tab open until the output is ready and inspect playback before sharing it.
Convert a short WebM screen recording and check that the downloaded MP4 plays with the expected audio.
Runtime assets require an initial download. Large files can be slow or exceed browser memory, and output compatibility depends on the source and supported codecs.
Open a WebM video and wait for the conversion runtime to load. Review the available settings and start conversion. Download the MP4 and check its video and audio playback.
Runtime assets require an initial download. Large files can be slow or exceed browser memory, and output compatibility depends on the source and supported codecs.
No registration, no tracking of your content, no server uploads. Don't just take our word for it:
Your files and text are processed entirely on your device. Nothing is ever sent to us.
Once loaded, this tool keeps working with your Wi-Fi turned off. Try it.
Open your browser's DevTools → Network tab. You'll see zero requests carrying your data.
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