Convert WebM to MP4
WebM is common for screen recordings and web downloads. iPhones, some editors and many upload forms only take MP4. Convert it here, on your own device.
Your file stays on your device. Nothing is uploaded.
How to convert WebM to MP4
- Choose your WebM file.
- Pick "Plays everywhere" (H.264) or "Fastest".
- Press "Convert to MP4", check the preview and download.
Your video never leaves your device
The conversion runs in your browser. Nothing is uploaded, so there is no upload wait and no copy of your video on a server.
Frequently asked questions
Why does WebM need re-encoding?
WebM usually holds VP8 or VP9 video, which MP4 players rarely support. We re-encode it to H.264 so it plays everywhere.
Is it free? Is there a watermark?
It is free, adds no watermark and needs no sign-up.
"Plays everywhere" or "Fastest": which one should I pick?
"Plays everywhere" re-encodes the video to H.264, which every phone, computer and TV can play. "Fastest" keeps the original video when the MP4 format allows it, so it takes seconds and the quality is unchanged, but HEVC video may not play on older Windows PCs.
How big can my file be?
Up to 2 GB on desktop Chrome and Edge, 1 GB on desktop Safari and 500 MB on phones.