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Core Web Vitals Checker

Free Core Web Vitals checker — run Google PageSpeed Insights on any page: performance score, LCP, CLS, INP, TBT and more, with lab and CrUX field data in one report.

Check Core Web Vitals

Enter any page URL to get Lighthouse lab data and CrUX real-user field data from Google PageSpeed Insights in one pass: LCP, CLS, INP, TBT, FCP and more.

  • Lab + CrUX field data with performance score and top opportunities
  • Mobile and desktop strategies, same as Google
  • Free, no signup; a run takes about 15-40 seconds (full Lighthouse run)

How it works

  1. Enter a page URL and choose mobile or desktop.
  2. We run the full Google Lighthouse analysis plus CrUX field data for the URL.
  3. Review the score, each metric rating and the top opportunities — fix the biggest-impact item first.

Features

  • Performance score with color grading from a full Lighthouse run
  • Six lab metrics: LCP, CLS, TBT, FCP, Speed Index and TTI with ratings
  • CrUX real-user field data for both the page and the whole origin
  • Top opportunities ranked by impact so you fix what matters first
  • Mobile and desktop strategies, same as the Google tool

FAQ

What are Core Web Vitals?
Core Web Vitals are Google page experience metrics: LCP (loading), INP (interactivity) and CLS (visual stability). They are part of Google page experience signals.
What is the difference between lab and field data?
Lab data comes from a controlled Lighthouse run on one device profile; field data (CrUX) aggregates real Chrome users over the last 28 days. Lab shows what to fix; field shows what users experience.
Why is there no field data for my page?
Google only publishes CrUX data for URLs with enough real traffic. New or low-traffic pages have no field data — that is normal; use the lab metrics instead.
Is this tool free?
Yes, completely free with no signup. Each run takes 15-40 seconds; results are cached for 6 hours.

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