Convert Video to WebM

Drag your video here

Or

Drop in almost any video — MOV, MP4, MKV, AVI, MPEG or an animated GIF — and get VP9 WebM back. Rewwwrap converts in your browser, so there is no upload step and no waiting in a queue.

How to convert Video to WebM

  1. Add your video filesDrag them onto the drop zone above, or click to browse. Add as many as you like — they stay on your computer.
  2. Tune the settingsSet quality, frame rate and scale. Leave Transparency on to keep any alpha channel.
  3. Convert and downloadClick Convert. Each finished WebM file gets its own download button, or grab everything with Download all.

What is WebM?

WebM is an open, royalty-free video format designed for the web. It pairs the VP9 video codec with Opus audio and is supported natively by Chrome, Edge, Firefox and Android.

It is the only widely supported web video format that can carry an alpha channel, which is why designers use it for transparent overlays, animated logos and cut-out product shots.

Frequently asked questions

Which input formats are supported?

MOV (including ProRes), MP4, M4V, MKV, AVI, MPEG, WebM and animated GIF.

Can I convert several videos at once?

Yes — drop multiple files and they are converted one after another, each with its own download button, plus a Download all ZIP.

Does WebM work on iPhone?

Recent versions of Safari on iOS and macOS play VP9 WebM, but do not render WebM transparency. Offer an MP4 fallback for older Apple devices.

Related converters