Transparent Video Maker — Video to WebM with Alpha

Convert your video to a transparent WebM (alpha channel preserved) for websites, overlays and motion graphics — free, in your browser. No upload, no sign-up.

Frequently asked questions

Do you upload my video?

No. Processing runs locally in your browser.

Which sources keep transparency?

Sources that already contain an alpha channel — typically WebM/MKV (VP8/VP9 alpha), or MOV in browsers that can decode it. A normal MP4 has no transparency to keep.

Can I use ProRes MOV files?

Yes. ProRes sources with alpha—including iPhone ProRes 4444—decode locally in supported browsers. No upload required.

What output format do I get?

A WebM file using VP9 with the alpha channel encoded as side data.

Where can I use a transparent WebM?

On websites (HTML video with transparency), overlays, and motion graphics in modern browsers.

Will it reduce quality?

Re-encoding can slightly change quality depending on the source and bitrate.