Como funciona
- 1Upload MP4, MOV, WEBM, or MKV
- 2Pick WebM (alpha for the web) or MOV (ProRes 4444 for editors)
- 3Keep existing alpha, or chroma-key green / blue / white / black / custom
- 4Preview on a checkerboard (WebM) and download
Assistente de VozPrecisa de legendas de IA?Ferramenta online grátis
Vídeo transparente online
WebM VP9 alfa ou ProRes 4444
WebM VP9 alfa ou ProRes 4444
Vídeo transparente online
WebM VP9 alfa ou ProRes 4444
- MP4
- MOV
- WEBM
- MKV
MP4 H.264 não tem alfa. WebM VP9+alfa no Chrome/Firefox; ProRes MOV para edição.
Pronto — solte um arquivo abaixo.
Por que esta página
WebM VP9 + alpha
Browser-playable overlay with a real alpha channel. Requires -auto-alt-ref 0.
ProRes 4444 MOV
Editing format with alpha for Premiere / Final Cut. May not preview in the browser.
Solid-color key
H.264 sources have no alpha — key out green/white/black to create one.
FAQ
Why can’t you just make my MP4 transparent?
Standard H.264 MP4 has no alpha plane. The pixels are opaque. True transparency needs a format that stores alpha, such as VP9 WebM or ProRes 4444.
My clip is on a white or green background.
Choose that key color. Similarity controls how close a pixel must be; blend softens the edge.
The source already has transparency.
Set background key to “Keep existing alpha” so we re-encode without chromakey.
Safari / iPhone?
VP9 alpha is most reliable in Chrome and Firefox. For Apple editors, download the ProRes MOV.