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Core Web Vitals Checker

Measure LCP, CLS, TBT and INP against Google's thresholds and see what to fix.

These are lab estimates, not field data

This server fetches the page and measures response timing and code volume. It cannot run a real browser, so the numbers are a good signal but not the values in your Search Console Core Web Vitals report. Use this to find what to fix, then confirm in Search Console.

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What Is Core Web Vitals Checker?

The Core Web Vitals Checker measures a page against current Google thresholds for loading, interactivity, and visual stability. It reports LCP, CLS, TBT, and INP with pass-or-fail verdicts and points to what needs fixing whenever a metric misses.

Who Uses the Core Web Vitals Checker?

Developers, performance engineers, and SEO teams use it to triage slow pages and confirm that optimizations actually move the numbers.

How to Use the Core Web Vitals Checker

  1. Enter the full URL of the page to measure.
  2. Submit the form to run the lab measurement.
  3. Read each metric against its threshold: LCP, CLS, TBT, and INP.
  4. Work through the flagged issues, then re-measure to confirm the fix.

Why Choose Our Core Web Vitals Checker?

  • Lab measurement with no browser extensions required
  • Every metric judged against current Google thresholds
  • Highlights exactly which vitals are failing

Try the Core Web Vitals Checker above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.