← All free tools
Core Web Vitals checker
Lab LCP, INP, and CLS for any public URL. Free, no signup. Field CrUX may differ.
Uses Google PageSpeed Insights lab data when available. Optional env: PAGESPEED_API_KEY
Lab LCP, INP, and CLS for any public URL. Free, no signup. Field CrUX may differ.
Uses Google PageSpeed Insights lab data when available. Optional env: PAGESPEED_API_KEY