ProofMark
Circle what’s wrong. State your changes. Hand it to AI.
Paste a screenshot (⌘V) or drop in a PDF, drag a circle around anything, and type what you want changed. Everything runs on your device — nothing is uploaded, ever.
An empty quadrant of chart.
⌘V to paste a screenshot — or drop an image or PDF here, or click to browse.
Visual feedback beats a paragraph of directions.
If you build with AI, you spend a surprising amount of time describing pixels in words: “the third card down, no, the one under the header, make that gap smaller.” The model does its best with your paragraph. You both deserve better.
So: circle it. Number it. Say what you want in a line each. Copy the marked-up proof and the numbered list, paste both into Claude or ChatGPT, and the conversation starts from exactly what you see instead of what you managed to describe. Works on screenshots and PDFs alike — web pages, decks, contracts, print proofs.
It runs entirely in your browser — no account, no upload, no server. Your screenshots and documents never leave your machine.
Built in an afternoon, with AI, because the loop it tightens is one I run every day.