Blue screen remover
Blue backdrops are used whenever the subject is warm — skin tones, brown hair, warm clothing, anything with a lot of red and yellow in it. This tool keys blue the same way it keys green: locally, in your browser, with the key colour as a parameter rather than a fixed assumption.
Blue or green — which one should you shoot on?
Both work. The usual reasons to pick blue:
- Warm subjects. Green screens spill green onto skin, which reads as sickly. Blue spill is easier to live with on warm tones.
- Night scenes. Blue is closer to the ambient colour of a night look, so the composite sits better.
- Blue clothing. The obvious reverse: if the talent is wearing blue, do not shoot on blue.
Green is still the more common choice, mostly because digital camera sensors are more sensitive in the green channel, so a green screen keys more cleanly at the same light level.
How to key a blue screen here
- Open the tool and drop your file in — photo or video, either works.
- Under Key colour, pick Blue. Auto-detect usually finds it on its own; setting it by hand is the fallback.
- Leave Tolerance at the default and look at the result on the checkerboard. Raise it only if patches of blue survive; lower it only if parts of the subject vanish.
- Export a transparent PNG, a ZIP of PNG frames, or a transparent WebM.
Why the key colour is a parameter
A lot of "green screen remover" tools hard-code green. That is fine until you have a blue screen, a magenta one, or a neutral wall. This one measures distance in the Cb/Cr plane from whatever key colour you give it, and falls back to a luminance measure when the backdrop has almost no chroma — which is what lets it handle a white wall, badly but not catastrophically.
We published the measurement behind that on the benchmark page, including the two cases where a single global threshold fails.
What you get out
- Transparent PNG for stills.
- PNG sequence in a ZIP for bringing frames into an editor.
- Transparent WebM for video that needs to keep its alpha.
No watermark, no resolution cap, no account. The file stays on your machine the whole time — see why that matters.