Fast sites rank better. This tool uses the same PageSpeed Insights API as Google Search Console: it measures Core Web Vitals (LCP, INP, CLS) from CrUX field data over the last 28 days — the exact numbers Google uses for ranking.
Site speed and Core Web Vitals tester
LCP, INP, CLS measurement via the Google PageSpeed Insights API. Supports mobile and desktop.
Tool widget will live here. Use the main product in the meantime.