Convert MP4, MOV and WebM to web-friendly MP4 (H.264) or WebM (VP9). Pick resolution, quality and fps, trim or mute to shrink the file. Runs in your browser, no upload.
This tool converts with the browser’s built-in video encoder (WebCodecs), which this browser doesn’t support.
Please open it in the latest Chrome · Edge · Safari (16.4+) · Firefox (130+). In any browser, your files are never sent to a server.
Reading video info…
Drag the handles or type a time (e.g. 1:05.5 · 65.5). Focus a handle and use ←→ to nudge 0.1 s, or Shift+←→ for 1 s.
No. It's converted on this device with the browser's built-in video encoder (WebCodecs). Your video is never sent anywhere, and the result disappears when you close the tab, so be sure to download it.
File size is roughly quality (Mbps) × length. Dropping to 720p and choosing Standard or Small file quality helps the most. Turn on Remove audio if you don't need sound, and trim to just the part you need.
If you're not sure where it's going, choose MP4 (H.264): it plays on phones, social media, messaging apps and almost every website. WebM (VP9) is smaller at the same quality but mainly for web browsers. Formats your browser can't encode are grayed out, and if AAC audio isn't supported you can use Opus or no audio.
Yes, but depending on your device it can take longer than the video itself, and because the whole result is kept in browser memory, very long videos (tens of minutes or several GB) may fail. In that case, convert them in parts. Only convert videos you have the rights to.