About

I sell AI-generated clipart on Adobe Stock. The slow part of that work was never the generating; it was turning a render made on a blue background into a transparent PNG a buyer can drop onto anything. So I wrote a chroma keyer in Python for my own pipeline and put thousands of my own images through it, changing it each time a render came out wrong.

ClipBrook is that keyer, ported to TypeScript so it runs in worker threads in your browser instead of on my desk. The guide is the other half of the same job: the prompt wording I use to get renders that cut cleanly, written out for each generator.

Why it is free

The site is a set of static files, and your own computer does the cutting, so a thousand visitors cost about what one visitor costs. There is no account, no credit balance, no watermark and no limit on how many files you cut. Ads may appear on the site later; if they do, the privacy page will say what they collect before they go live.

What is open and what is not

The cutting engine is open source under the AGPL. The web app around it, this text, the guide and the design are not. The open-source page covers the license and where the code lives.

The 4500 and 3000 px export sizes exist for print-on-demand and marketplace uploads, which is the work the tool was written for. The keyer is arithmetic on pixel values, not a trained model, and it only works on art rendered against one flat color.

Contact

[email protected]. If a render cuts badly, attach the file yourself. The tool sends nothing anywhere, so there is no copy of your image for me to look at otherwise.