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Core Web Vitals
Free CrUX Monitor 2026
Check real Chrome user data (Core Web Vitals) for any origin or URL. Powered by the Google Chrome UX Report (CrUX) API — the same data source Google uses for the page experience ranking signal.
How to read this report
- LCP (Largest Contentful Paint) — good ≤ 2.5s, poor ≥ 4s.
- INP (Interaction to Next Paint) — good ≤ 200ms, poor ≥ 500ms.
- CLS (Cumulative Layout Shift) — good ≤ 0.1, poor ≥ 0.25.
- FCP (First Contentful Paint) — good ≤ 1.8s, poor ≥ 3s.
- TTFB (Time to First Byte) — good ≤ 0.8s, poor ≥ 1.8s.
Data comes from real Chrome users (28-day rolling window for the current record, 25 weekly points for history). Small sites without enough traffic may return “no data”.