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Visual Proof
UI Screenshot Diff Proof Studio
Compare before and after UI screenshots, generate annotated diff heatmaps, changed-pixel percentages, viewport proof sheets, and JSON evidence receipts.
Reviewed 2026-06-18
DesignBrowser-firstReal artifactProof receiptNo signup
WHY THIS EXISTS
Built for creators and agents that need artifact proof
Compare before and after UI screenshots, generate annotated diff heatmaps, changed-pixel percentages, viewport proof sheets, and JSON evidence receipts. The useful output is not a vague score: every run creates a visible artifact and a receipt that names the input, evidence, limits, and next action.
- Creates a visible diff artifact instead of only a text score.
- Reports dimensions, threshold, changed pixels, and containment warnings.
- Gives AI agents a concrete visual proof receipt before claiming UI work is done.
Boundary: Not for legal visual evidence, medical imaging, pixel-perfect accessibility certification, or replacing human design review.