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On-device · nothing uploaded

WebM to MP4 converter

Turn WebM videos into MP4 files that play on phones, TVs and in any app. Free, private, nothing uploaded.

How it works, privately

How it works, privately

  1. Choose your WebM videos. You can also drop files on the page. They open in this browser tab; nothing is sent anywhere.
  2. MP4 is already picked. Press Convert.
  3. Save the result to your device. Close the tab and nothing is left on any server, because nothing was ever sent.

Questions

Is it free?
Yes. Convert video & audio is free to use, with no account, no sign-up and no daily limit.
Are my files uploaded?
No. Convert video & audio runs inside your browser, on your own device. Your files are never sent to a server, so nobody else can see them.
Does it work on my phone?
Yes. It works in an up-to-date browser on phones, tablets and computers. Very big files are quicker on a computer.
Do I need to install anything?
No. Open the page and use it. You can also add Toolbox to your home screen like an app.