Convert Transparent Video to WebM

Drag your transparent video here

Or

Already have a transparent video? Convert it to WebM with its alpha channel intact — the smallest way to put transparent motion on a website.

How to convert Transparent Video to WebM

  1. Add your transparent 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.

Keeping alpha intact

Rewwwrap reads the source's pixel format to detect alpha, then encodes VP9 with a yuva420p pixel format so transparency is preserved.

Re-encoding an existing transparent WebM (for example to shrink it) also keeps alpha, because WebM input is decoded with libvpx rather than the alpha-dropping native decoder.

Frequently asked questions

Which transparent formats can I convert?

ProRes 4444 MOV, Animation (QTRLE) MOV, PNG MOV, transparent WebM and transparent GIF.

Can I shrink an existing transparent WebM?

Yes — drop it in and lower the quality or scale. Alpha is kept.

Which browsers show WebM transparency?

Chrome, Edge, Firefox and Opera. Safari shows it opaque.

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