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Convert MP4 to WebM

Turn MP4 files into WebM. Free, no sign-up, and your files never leave your device.

    How to convert MP4 to WebM

    1. Click the box above or drag your MP4 files into it.
    2. Each file is converted to WebM automatically — you see the progress for every file.
    3. Click Download next to each result.

    About MP4 and WebM

    MP4 is the most widely supported video format — it plays on phones, TVs, browsers and social networks.

    WebM is an open web format (VP9 / Opus). Screen recordings from browsers are often WebM, but iPhones and some editors can’t open it.

    Frequently asked questions

    How do I convert MP4 to WebM?

    Drop your MP4 files into the box above. Each one is converted to WebM in your browser — then click Download.

    Are my files uploaded?

    No. FileCrafty converts files inside your browser, so they never leave your device.

    Which browsers are supported?

    Recent Chrome, Edge and Safari work best. Firefox works for most files.

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