Core Web Vitals Checker

Good: LCP < 2.5s, CLS < 0.1, TBT < 200ms. These affect Google ranking.

This uses Google PageSpeed Insights API for lab data. For field data check Chrome UX Report.

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Frequently Asked Questions

What are Core Web Vitals?

Three key metrics Google uses: LCP (loading), FID/TBT (interactivity), CLS (visual stability).

What are good scores?

Good: LCP < 2.5s, CLS < 0.1, TBT < 200ms. These affect Google ranking.

Does this use real user data?

This uses Google PageSpeed Insights API for lab data. For field data check Chrome UX Report.