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Make a green screen video

Choose green, blue, or a custom screen color, preview the edges, and create key-ready footage.

How it works
  1. ImportChoose source
  2. AnalyzeRun locally
  3. PreviewReview result
  4. ExportCreate file
InputMP4, WebM, MOV and M4V videoOutputMP4 or WebM video

When you actually have a green or blue screen, colour keying beats segmentation: the edges are cleaner, the mask is stable frame to frame, and the result holds up under scrutiny. This tool keys on green, blue or a custom colour you sample from the footage, and gives you an edge inspection view so you can see exactly what the key is doing.

Green or blue, and why it matters

Green is the usual choice because digital sensors capture more green information than red or blue, giving a cleaner key, and because green is furthest from most skin tones. Blue is the better option when the subject is wearing green, when you need a colour that will not spill green onto blond hair, and in some traditional film workflows. A custom colour handles the cases where you are keying something else entirely — a coloured wall, a paper backdrop, a solid area of a graphic.

Lighting the screen is most of the job

A key is only as good as the screen behind it. Light the backdrop separately from the subject and as evenly as you can, because shadows and hot spots mean no single colour range covers the whole frame, and you end up choosing between holes in the subject and patches of screen left behind. Keep the subject well away from the backdrop — a metre or more if space allows — so bounced green light does not land on their shoulders and hair. Fixing spill in software is possible; not creating it is far better.

Inspecting the edges

Judging a key from the composite alone hides its faults, because a busy replacement background disguises a rough edge until someone watches it full screen. Inspecting the matte directly shows what is really happening: whether the subject is solid, whether the background is truly gone, and whether there is a fringe of screen colour around the outline. Tighten until the background is clean without eating into hair and fingers, and check a few frames with movement — a key that holds on a static pose can fall apart the moment someone gestures.

Questions, answered

Should I use a green or a blue screen?

Green in most cases — sensors capture more green detail and it is furthest from skin tones. Choose blue if the subject wears green, or when green spill onto light hair would be a problem.

Why is my key patchy?

Almost always uneven lighting on the backdrop. Shadows and hot spots mean no single colour range covers the whole screen. Light the backdrop separately and evenly before adjusting settings.

What is green spill and how do I avoid it?

Light bouncing off the screen onto your subject, usually on shoulders and hair. Move the subject further from the backdrop — a metre or more — and light them separately.

Can I key a colour other than green or blue?

Yes, you can sample a custom colour from the footage, which covers coloured walls, paper backdrops and solid areas in graphics.

What if I do not have a green screen?

Use the background removal tool, which separates the subject without one. Edges are softer than a well-lit key, and blurring the background instead is the most forgiving option.

Useful next steps

Continue with a tool that fits naturally after green screen maker.

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