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Convert MP4 to WebM

Convert MP4 files to WebM in your browser.

Drop files here

or paste them in. Whole folders work too.

  • Nothing is uploaded
  • Works offline
  • Free and open source

How to convert MP4 to WebM

  1. Choose your MP4 files, or drop them anywhere on this page.

  2. Check that WebM is selected, and change the settings if you need to.

  3. Select Convert, then save your WebM files.

About MP4 and WebM

MP4

MP4 is the most widely supported video format. It plays on phones, in browsers and on TVs, and opens in almost every editing app.

WebM

WebM is an open video format for the web, using VP8, VP9 or AV1 video. Browsers play it, but many editors and Apple apps don’t.

Questions

How do I convert MP4 to WebM?
Choose your MP4 files or drop them on this page, check that WebM is selected, then select Convert and save the result. It works the same on a phone or a computer.
Is it safe to convert MP4 to WebM here?
Yes. The conversion runs in your browser, so your MP4 files are never uploaded, stored or logged.
Can I convert several MP4 files at once?
Yes. Add as many as you like and they convert together. Save each result on its own, or all of them as one ZIP.

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