Convert MOV to Transparent WebM

Drag your MOV files here

Or

The classic motion-design handoff: export a ProRes 4444 MOV with alpha from After Effects, then convert it here into a transparent WebM that is small enough for a website.

How to convert MOV to Transparent WebM

  1. Add your MOV 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 transparent WebM file gets its own download button, or grab everything with Download all.

From After Effects to the web

In After Effects, add your comp to the Render Queue, choose QuickTime with Apple ProRes 4444 and set Channels to RGB + Alpha. Drop that MOV here.

A ProRes master of a few seconds can be 100 MB+; the transparent WebM is usually under a few megabytes and plays in Chrome, Firefox and Edge.

Frequently asked questions

My WebM is not transparent — why?

Check the MOV was exported with RGB + Alpha, and that Transparency is switched on. Then view it in Chrome, not Safari or QuickTime.

Does this work with Premiere and Final Cut exports?

Yes, any MOV with an alpha channel works.

Why is transparent WebM slow to render?

VP9 alpha encodes two streams. Run the optional native helper for much faster rendering.

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