Is the green screen effect free?

Yes. All 172 effects are free, including every keyer and matte tool. There is no paid tier that unlocks features — a subscription only removes ads from the app.

Do I have to upload my footage?

No. Decoding, keying and export all run in the browser tab on your own machine. Nothing is sent to a server, so there is no queue and no copy of your footage anywhere but your disk.

Does it work on a blue screen?

Yes. The key colour is whatever you set it to, so blue screens, and any other flat backing colour, work the same way as green.

Will it hold hair and soft edges?

Chroma Key answers linearly, which is what keeps a soft edge soft, and Key Cleaner is there for what it leaves. On a difficult plate, Color Difference Key gives you two mattes to tune against each other. A screen lit unevenly is still the thing that decides how good the edge gets.

Is there a watermark on the export?

No. Nothing is burned into the picture at any resolution, there is no length cap, and no card is needed to export.

Which browsers does it work in?

Chrome and Edge get the full experience. Firefox and Safari run the editor but cannot choose where a file is saved, so exports go to the Downloads folder. Desktop browsers only.

Can I animate the key?

Yes. Every control on every effect keyframes, including the keyer's tolerances and the spill suppressor's, with a curve editor for the easing.

bentocut

Green screen · Chroma key

Key a green screen in a browser tab.

Nine keying effects and four matte tools, running on your graphics card. Point Chroma Key at the screen colour and the background goes, live in the preview.

Open the editor See the whole editor

No account, no upload, no watermark on the way out.

What a keyer produces

A key is a chain, not one slider.

The plate as shot, the matte pulled from it, and the composite. The middle frame is the one everything else on the shelf operates on.

A keyer's output is alpha — a greyscale statement about which pixels survive. Every argument anyone has ever had about a green screen is an argument about that middle frame: how hard its edge is, whether it holds hair, whether it flickers frame to frame.

So the tools are split the way the problem is. The keyer decides where the edge falls. Key Cleaner decides what the edge looks like. The spill suppressors deal with the light that bounced off the screen and landed on your subject, which no matte can fix because it is in the picture rather than in the alpha.

Green or blue
Live in the preview
GPU accelerated
Stack as many as you need
Every control keyframes

Removing a green screen, start to finish

Six steps, none of which involve an account or a render queue.

01
Drag the clip in
It is ready to cut the moment it lands. Nothing uploads, so there is no import bar and no queue.
02
Add Chroma Key
Select the clip, press ⌘E, and pick it off the shelf. Set the key colour to your screen and the background drops out live in the preview.
03
Work the matte, not the picture
BALANCE and SCREEN GAIN decide how much of the screen counts as screen. Turn SHOW MATTE on and you are looking at what the keyer actually produced.
04
Clean the edge
Key Cleaner sits under the keyer and touches only alpha: CHOKE pulls a green fringe in, SOFTEN takes the aliasing off, REDUCE CHATTER stops the edge boiling on grainy footage.
05
Take the green off the subject
Advanced Spill Suppressor subtracts the screen's hue out of skin and hair without draining the colour underneath it.
06
Put something behind, and export
Drop a clip, a still or a solid on the track below. Then export MP4, WebM or MKV up to 8K, with nothing burned into the picture.

The whole shelf

Nine keyers, because one of them will hold a shot the others can't.

Which to reach for, and what each one is actually measuring.

Chroma Key

The one to start with. Measures hue against the screen colour and answers linearly, which is what makes its edges soft. Carries its own spill control.

Color Difference Key

Builds two mattes — green over red, green over blue — and levels them separately, so a pixel has to look like the screen against both. Wins on a yellow or a cyan that fools one of them.

Color Range

Brightness and hue on separate tolerances. The one for removing an object rather than a backing: a grey sky but not the grey road, a lit surface but not its shadow.

Linear Color Key

Straight RGB distance from one colour. Blunt on footage, exact on a graphic — and useful last in the rack, pointed at whatever another keyer left behind.

Extract

Keys on brightness alone, no colour involved. Smoke against black, a flame, a lamp, white text off a page: footage where the subject is the luminance and there is no screen to sample.

Key Cleaner

Reads alpha, writes alpha, leaves the picture alone. Choke, soften, steepen, and average the matte across frames so it stops flickering on grain.

Advanced Spill Suppressor

Subtracts the screen's direction out of a pixel's chroma and leaves its brightness where it was, so the lit side of a cheek stops being green without going grey.

Linear Color Spill Suppressor

The same subtraction with no wedge and no threshold — every pixel loses that much of the screen's hue, in proportion. Nothing to tune, and it keyframes in a straight line.

Wire Removal

Two keyframeable handles mark a rig wire and the picture is walked across it. Invisible against sky or a soft-focus set; a smear against detail, and the honest fix there is a patch.

And four tools for the matte itself

Simple Choker — Contract or spread the matte edge

Matte Choker — Spread then contract, to close holes in a matte

Refine Hard Matte — Snap a crisp matte edge onto the picture's own

Refine Soft Matte — Rebuild fractional coverage on a soft edge

What it won't do

You need an actual screen: There is no AI background removal here. A keyer measures colour, so a subject in a kitchen has nothing to key against.
A badly lit screen costs edge: Five keyers means one of them will usually hold a shot the others can't. None of them can recover a subject the screen was brighter than.
Chrome and Edge get the full export: Firefox and Safari can't pick a destination folder, so exports land in Downloads.
Desktop only, and the tab stays open: Export runs in the page. Close the tab mid-render and the render goes with it.

Questions people ask before they start

Is the green screen effect free?: Yes. All 172 effects are free, including every keyer and matte tool. There is no paid tier that unlocks features — a subscription only removes ads from the app.
Do I have to upload my footage?: No. Decoding, keying and export all run in the browser tab on your own machine. Nothing is sent to a server, so there is no queue and no copy of your footage anywhere but your disk.
Does it work on a blue screen?: Yes. The key colour is whatever you set it to, so blue screens, and any other flat backing colour, work the same way as green.
Will it hold hair and soft edges?: Chroma Key answers linearly, which is what keeps a soft edge soft, and Key Cleaner is there for what it leaves. On a difficult plate, Color Difference Key gives you two mattes to tune against each other. A screen lit unevenly is still the thing that decides how good the edge gets.
Is there a watermark on the export?: No. Nothing is burned into the picture at any resolution, there is no length cap, and no card is needed to export.
Which browsers does it work in?: Chrome and Edge get the full experience. Firefox and Safari run the editor but cannot choose where a file is saved, so exports go to the Downloads folder. Desktop browsers only.
Can I animate the key?: Yes. Every control on every effect keyframes, including the keyer's tolerances and the spill suppressor's, with a curve editor for the easing.

The rest of it is free too

Open a tab and key something.

Open the editor

Free, no account, and your footage never leaves the machine.