Compare

See exactly what drifted.

Scan two URLs at once and every check lines up in one table — the rows that disagree flagged, so staging-vs-prod drift can't slip past a deploy. Or benchmark your site against one you admire, header for header.

A
B

Try a comparison — real grades, side by side

github.com vs gitlab.com headers, side by side → stripe.com vs paypal.com headers, side by side → cloudflare.com vs fastly.com headers, side by side → nytimes.com vs theguardian.com headers, side by side →