Free Core Web Vitals Checker

Enter a URL to measure your Core Web Vitals scores — LCP, CLS, and INP — using Google's PageSpeed Insights API.

How it works

This tool uses Google's PageSpeed Insights API to measure your three Core Web Vitals: Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP). These are the metrics Google uses as ranking signals.

Good scores: LCP under 2.5s, CLS under 0.1, INP under 200ms. This check may take 10–15 seconds as it runs a full Lighthouse analysis.

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