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WebM to MP4 Converter

Convert WebM videos to MP4.

Picture and sound

Picture and sound are copied as they are when the new format allows it (fast, nothing lost). This converts only what older devices can’t play, such as Dolby Digital sound.

WebM, and other videos, several at once

Drop more files anywhere on this page, or

    Runs on your device. No upload wait.

    What you get

    • Plays everywhere
    • Hardware speed

    Questions

    Why convert WebM to MP4?

    WebM plays in browsers but not always in phone galleries, Windows’ older players, iMovie, Premiere or on some social networks. MP4 with H.264 is accepted by all of them.

    Does it lose quality?

    WebM’s VP9 picture has to be re-encoded as H.264, at a high quality setting. Differences are hard to see, but the file can be larger than the WebM, since VP9 compresses better.

    How long does it take?

    Copying without re-encoding takes seconds, even for long videos. Re-encoding runs at roughly real time or faster on a recent computer, using its video hardware; phones are slower.

    Are my videos uploaded anywhere?

    No. Your videos are opened and processed on your device, and the results are saved straight back to it. Nothing is uploaded. How to check.

    Is it free? Do I need an account?

    It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.

    Missing something, or not working as it should? Tell us