Free tool
Lab scores from Lighthouse.
The same engine as DevTools.
Paste a public URL and we run headless Chrome with Lighthouse: Core Web Vitals context, category scores, and prioritized audits. Built on Google's open-source project—perfect for a baseline before deeper answer-engine work.
Lighthouse
URL in. Chrome Lighthouse scores out.
Lighthouse ready
Powered by GoogleChrome/lighthouse. Lab data only—real users, networks, and AI citations can differ. First run may take up to a minute. With GOOGLE_PAGESPEED_API_KEY, each run fetches mobile and desktop Lighthouse passes from Google (same idea as switching device mode in DevTools). Without the key, this machine runs one local headless Chrome pass; Vercel requires the key.
lighthouse run
Launching headless Chrome
Loading page with Lighthouse
Auditing performance & metrics
Accessibility & best practices
SEO checks & assembling report
$ Waiting for a public URL.