MotionShine01 / Drop
Choose a video
Drag in an MP4 or a MOV. It plays from your own disk.
Free tool
MP4 to WebM converter.
Turn an MP4 or a Mac .mov into a WebM with VP9 video and Opus sound, the format many websites use for background and inline video. It runs in your browser, so nothing is uploaded.
This runs in your browser. Your files are never uploaded.
How it works
Three steps, nothing to install.
02 / Pick
Choose the quality
Balanced suits most uses. Small makes a lighter file for a web page.
03 / Save
Convert and download
The video is re-encoded to VP9 and Opus. Play it, then download it.
Questions
Good to know.
Is my video uploaded?
No. It is converted in this tab with your browser, so the file never leaves your computer.
Why use WebM?
WebM with VP9 is an open format that browsers play well, and it is often smaller than H.264 at the same look. Websites use it for background and inline video.
Which codecs does it use?
VP9 video and Opus sound. If the browser cannot encode VP9 it uses VP8.
Does it lower the quality?
The video is re-encoded, so there is a small loss, as with any re-encode. Pick High for the least loss.
Will Safari play the WebM?
Current Safari plays VP9 WebM on recent Macs and iPhones. For the widest support, keep an MP4 as well.
Which browsers work?
Current Chrome and Edge can encode VP9. Other browsers may not be able to make the file.