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Tools/Site Auditor

Site Auditor

Run a full Lighthouse audit on any URL. Get performance scores, Core Web Vitals, SEO checks, accessibility issues, and actionable recommendations — powered by the Google PageSpeed Insights API.

API calls go directly to Google — we don't proxy or store any data
This tool is made possible thanks to the free Google PageSpeed Insights API and the open-source Lighthouse project by the Google Chrome team. Thank you for keeping web performance analysis accessible to everyone.
How it works
Lighthouse Site Audit (PageSpeed Insights API)
01URL input

The target URL — must be publicly accessible for Google's servers to fetch and analyze the page

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02API request

PageSpeed Insights API runs a full Lighthouse audit on Google's infrastructure — mobile or desktop simulation

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03Categories

Four audit categories scored 0–100: Performance, Accessibility, Best Practices, and SEO

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04Core Web Vitals

Real-user field data (CrUX): LCP (loading), CLS (visual stability), FCP (first paint), TTFB (server response)

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05Recommendations

Each failed audit includes a description, impact estimate, and specific items to fix — prioritized by severity

Spec: Google PageSpeed Insights API v5, Lighthouse 12.x, Chrome UX Report (CrUX)

Lab data (simulated) shows what the page could score under controlled conditions. Field data (CrUX) shows what real users actually experience — field data is what Google uses for ranking.

Frequently Asked Questions