CrUX History Trends

CrUX is Google’s dataset of real-user performance, collected from actual Chrome visitors who opt in. It’s the “field data” Google uses for the Core Web Vitals part of page experience — as opposed to “lab data” from a one-off test like Lighthouse. This tool charts the p75 (75th-percentile) value over time, which is exactly what Google grades.

LCP (Largest Contentful Paint — loading), INP (Interaction to Next Paint — responsiveness, which replaced FID), CLS (Cumulative Layout Shift — visual stability), plus FCP (First Contentful Paint) and TTFB (Time to First Byte). For each, you get the p75 trend with the “good” and “poor” thresholds marked.

CrUX only publishes data for origins with enough real Chrome traffic to be statistically significant and anonymous. Newer or lower-traffic sites often aren’t covered yet. That isn’t a problem with your site — it just means Google doesn’t have enough field data. Use a lab test (our UI/UX Checker / PageSpeed) in the meantime.

Real-user (field) data — aggregated from actual visitors over 28-day rolling windows, shown across roughly the last 40 weeks. It reflects real devices and networks, so it can differ from a clean lab test. It’s the data that actually affects your Core Web Vitals assessment in Search Console.