Core Web Vitals Checker
See whether a page passes Google's LCP, INP and CLS thresholds and which fixes save the most time.
Inspect Core Web Vitals of a page
Real-user LCP, INP and CLS from the Chrome UX Report are shown at the 75th percentile with a pass or fail assessment, followed by a Lighthouse lab score and the audits with the largest estimated savings.
Interpret the result
Start with any Core Web Vital rated poor in the real-user data, apply the top lab suggestions, then allow 28 days for the field data to reflect the change.
Prioritize fixes
Field data exists only for pages and sites with enough Chrome traffic, lab scores vary between runs, and the URL you test is sent to Google to run the analysis.
How to interpret Core Web Vitals of a page
Real-user LCP, INP and CLS from the Chrome UX Report are shown at the 75th percentile with a pass or fail assessment, followed by a Lighthouse lab score and the audits with the largest estimated savings.
Limits of this check
Field data exists only for pages and sites with enough Chrome traffic, lab scores vary between runs, and the URL you test is sent to Google to run the analysis.
Frequently asked questions
What does this tool check?
Real-user LCP, INP and CLS from the Chrome UX Report are shown at the 75th percentile with a pass or fail assessment, followed by a Lighthouse lab score and the audits with the largest estimated savings.
How should I use the result?
Start with any Core Web Vital rated poor in the real-user data, apply the top lab suggestions, then allow 28 days for the field data to reflect the change.
What are the limits?
Field data exists only for pages and sites with enough Chrome traffic, lab scores vary between runs, and the URL you test is sent to Google to run the analysis.
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