Technical SEO Tool
Core Web Vitals Checker
Measure LCP, INP, and CLS with Google PageSpeed Insights and review both Lighthouse lab results and field data when available.
How to use
- Enter the full public URL of the page you want to test.
- Click Check Core Web Vitals.
- Wait for the mobile and desktop Lighthouse runs to complete.
- Review LCP, INP, and CLS, then compare the lab results with field data when Google provides it.
Important: Lab measurements are controlled tests and can differ from real-user data. A good lab result does not guarantee good field Core Web Vitals. Google recommends looking at the 75th percentile of page loads for Core Web Vitals field assessment.
Enter a public URL and run the checker.