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TheToolZip
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WebM to MP4 Converter

Convert WebM videos, such as screen recordings and web downloads, into MP4 for phones, presentations and messaging apps.

Your files never leave your device

Drop WebM files here

or

Up to 2 GB per file. Add as many files as you like.

How to convert WebM to MP4

  1. 1Drag your WebM videos into the box above, or click to choose them.
  2. 2Click "Convert". The progress shows while each video is converted.
  3. 3Download each MP4, or all of them as a ZIP.

Why convert WebM?

WebM is an open video format made for the web. Browsers, screen recorders and some download tools save videos as WebM, usually with VP8 or VP9 video and Opus sound. Some apps and devices don't open it, including older iPhones, PowerPoint on some computers and many messaging apps.

MP4 with H.264 video and AAC sound plays practically everywhere. This tool re-encodes the WebM into that combination, using your device's video hardware where it can.

Your files stay private

This tool runs entirely in your browser. Your files are never uploaded to a server, so nobody else can see them, not even us.Read our privacy policy

Frequently asked questions

Will the MP4 look the same?

The tool keeps a high quality, so the difference is very hard to see. The file size may change a little.

How long does it take?

It depends on your device and the video's length and resolution. On a recent device, usually less time than the video lasts.

Are my files uploaded to a server?

No. The conversion happens entirely in your web browser, on your own device. Your files are never sent to us or anyone else, so they stay completely private.

Is it really free?

Yes. There is no sign-up, no watermark and no limit on how many files you convert. The only limit is your device: very large files need more memory.

Does it work on my phone?

Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. Very large files may take longer on older phones.

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