Lighthouse Score Interpreter

Paste a Lighthouse JSON report (downloaded from DevTools, PageSpeed Insights, or a CI run) and get a plain-English summary of every score, with the top opportunities ranked by potential impact. Useful when sharing perf reports with non-developers or triaging which fix to do first.

How to use the Lighthouse Score Interpreter

Run Lighthouse in Chrome DevTools (Lighthouse panel → Generate report → Save as JSON), or download the JSON from pagespeed.web.dev. Paste it here. The interpreter shows each category score, lists the top opportunities sorted by potential savings, and explains each metric in plain English.