What screenshots catch that Lighthouse misses
A cookie banner covering the CTA, a font that failed open, a hero that cropped on mobile, a pricing table that wrapped incorrectly — none of that is INP, and all of it loses conversions.
Diffs are not about pixel perfection. They are about noticing that last night’s deploy changed the story visitors see.
Keep noise down
Watch money pages first: home, pricing, signup. Ignore pages that intentionally rotate ads every hour.
Compare against the previous good run, not against an ancient baseline from a redesign you already shipped.
Schedule it
On Pro, AuditHQ compares each new screenshot against the previous run and highlights changed pixels — so a deploy that moved your hero or pricing table shows up next to scores, not in a separate tool.
Free plans still capture a screenshot each run; upgrade to Pro for before/after diff and full audit history.