MP4 to WEBM

Convert MP4 files to WEBM online, free and fast.

Conversion runs on your own device. The first conversion downloads the converter engine (about 30 MB) once. Long videos can take a few minutes on phones.

How to convert MP4 to WEBM

  • 1. Choose or drag & drop your MP4 files.
  • 2. Click "Convert to WEBM".
  • 3. Download your WEBM files one by one or all together as a ZIP.

Frequently asked questions

Add your MP4 files, click convert and download the WEBM versions. You can convert several files at once.

Yes. You can convert files for free without creating an account.

Most conversions run entirely inside your browser, so the file never leaves your device. Formats that need desktop software (like Word, PowerPoint, eBooks and CAD) are converted on secure servers and deleted automatically after conversion.

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