Following on from Compare Website Speed last week, we’re rolling out another upgrade to our free tools: a rebuilt Core Web Vitals Test.
Here’s a live report for ikea.com to dig into while you read.
Front and centre: an overall UX Rating, summarising your site’s real-user experience in a single number.
Now with UX Rating#
Up front, you’ll see UX Rating: the share of real-world experience on your site that rates as good. Every metric a real Chrome user records is graded, and UX Rating is the percentage of those grades that came back good.
It tells you how much of what your visitors experience is actually good, and gives you a faster read than scanning a wall of metrics. Read more about why we built UX Rating.
It also makes for clean comparisons: see how your UX Rating stacks up against competitors, side by side.
See performance country by country#
UX Rating is also plotted globally, rendered on our custom hexagonal world map, so you can see how user experience varies between the countries your site serves. There’s also map data for LCP, CLS, INP and even TTFB.
Performance by country, rendered on our 10kb hexagonal world map.
Country-level CrUX data requires using Google’s BigQuery database, which is complex and eye-wateringly expensive. We’ve done it; you don’t have to. And then we made it free.
Deeper metric reports#
Dig into Largest Contentful Paint, Cumulative Layout Shift and Interaction to Next Paint with up to 9 months of history, experience distributions, and subpart breakdowns.
Spot a degrading trend in LCP, see where your users are getting stuck on INP, or confirm a recent CLS fix landed cleanly.
The LCP detail page, with a trend chart flagging a degrading 75th percentile, and an experience distribution by user experience.
Powered by real Chrome user data#
The data comes from Google’s Chrome User Experience Report: the same field dataset used in Calibre’s dedicated CrUX Monitoring product.
Use Core Web Vitals Test to:
- See whether any site passes Google’s Core Web Vitals assessment.
- Get a UX Rating that tells you how much of your visitors’ experience is actually good.
- Compare performance across the countries your site serves.
- Trace regressions in LCP, CLS or INP across 9 months of history.
- Share any report by URL, no sign-up needed.
For continuous monitoring of all your websites (and competitors), use Calibre CrUX Monitoring.
Calibre combines CrUX, Real User Monitoring and Synthetic Monitoring, giving you everything you need to monitor and improve your sites. Start a free trial.
Try Core Web Vitals Test on any site: