WebM to MP4
Convert a WebM video to MP4 — choose the quality, preview the result and download. Runs entirely in your browser; the video is never uploaded.
Input
Higher bitrate = sharper picture, bigger file. The video is re-encoded in real time, so conversion takes as long as the clip.
MP4 video
Upload a WebM video, pick a quality and press Convert to MP4. Everything runs in your browser — the file is never uploaded.
Also available with
Guides
What WebM to MP4 does
Turn a WebM clip — a browser screen recording, a Discord or Slack download, a web-sourced video — into an MP4 that plays in QuickTime, iOS, editors and social apps. The conversion runs in your browser, so the video is never uploaded.
How to use it
- Upload a WebM file.
- Pick a video quality (bitrate).
- Click Convert to MP4, preview the result, then download it.
Good to know
Your browser plays the video and re-records it, so conversion takes about as long as the clip itself — keep the tab open. WebM with VP8/VP9 plays in every current browser. If a browser can't record MP4, it saves WebM instead and says so. Re-encoding is lossy; raise the quality for detailed footage.
Privacy
Playback and encoding happen on your device. Nothing is sent to a server.