Chrome UX Report (CrUX)
CrUX is Google's real-user performance dataset that powers the Core Web Vitals ranking signal. Understanding it is essential for technical SEO.
The Chrome UX Report (CrUX) is a public dataset of real user experience metrics collected from Chrome browser sessions on opted-in Chrome users. It provides 75th percentile Core Web Vitals data for millions of URLs and origins.
CrUX data is aggregated in 28-day rolling windows and updated monthly. Google uses CrUX field data as the source for the Core Web Vitals ranking signal — specifically, whether a URL has 'Good' LCP, CLS, and INP at the 75th percentile across real Chrome users.
Understanding CrUX means understanding that your PageSpeed Insights lab score is not what Google uses for rankings. A site can score 90 in Lighthouse but have 'Poor' CrUX data if real users on slower devices experience poor performance. Both views are important — lab for regression detection, field for ranking assessment.
FAQ
What is CrUX?
The Chrome UX Report (CrUX) is Google's dataset of real-user Core Web Vitals metrics collected from Chrome browsers. It's what powers the Core Web Vitals data in Google Search Console and the field data section of PageSpeed Insights.
How often does CrUX data update?
CrUX data is aggregated in a 28-day rolling window and updates approximately monthly. Performance improvements take 28 days or more to fully appear in CrUX data.
What if my URL has no CrUX data?
URLs need a minimum traffic threshold to appear in CrUX. Low-traffic pages or new pages often have no URL-level data. In this case, Google falls back to origin-level data (all pages on your domain averaged together).
How do I view my CrUX data?
Google Search Console's Core Web Vitals report shows CrUX data for your site. PageSpeed Insights shows CrUX for individual URLs. AuditJet displays CrUX alongside synthetic monitoring data for each monitored page.
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