Free tools
Core Web Vitals Checker
Check a URL's field Core Web Vitals and lab Lighthouse metrics before you decide what to monitor.
This scan checks
Field vitals
Lab scores
Pass or fail
Device view
What the free result includes
Use the checker for quick triage before adding the site to continuous monitoring. The public view shows the headline verdict and the most important metrics first.
Overall pass or fail verdict for the selected URL and device.
Field LCP, INP, CLS, and TTFB when CrUX data is available.
Lab performance, accessibility, best-practices, and SEO scores.