How to convert WebM to MP4
- Drop the .webm file.
- MP4 is selected if your browser can create it. If the format menu only offers WebM, use Safari, or Chrome or Edge version 126 or newer.
- Keep High quality and Original resolution, then click Convert and download.
Why MP4?
WebM (VP8/VP9 video) is common for screen recordings, browser downloads and web video, but some phones, editing apps, social networks and smart TVs only accept MP4 with H.264, the most compatible video format in the world. Converting gives you a file that plays almost anywhere.
This converter is honest about its limits: it uses the browser's built-in recorder, which can encode MP4 only in Safari and in Chrome and Edge from version 126; Firefox can only make WebM. Conversion runs in real time, so a 2-minute video takes about 2 minutes, and the result is re-encoded rather than copied. The video is processed on your device and never uploaded.
FAQ
Why can’t I choose MP4?
Your browser cannot encode MP4. Use Safari or a recent Chrome or Edge.
Will the quality change?
Slightly, because the video is re-encoded. Use High quality and Original resolution.
Is there a length limit?
No fixed limit, but conversion takes as long as the video plays.