Core Web Vitals Checker
Enter your LCP, INP and CLS numbers from PageSpeed Insights or Search Console to see whether each one passes, what it means in plain words, and the most common fixes.
How to get your numbers
- Open PageSpeed Insights (pagespeed.web.dev) and test your page on mobile.
- Use the field data at the top (real users) if it is shown. Otherwise use the lab data.
- Enter LCP, INP and CLS here to see what passes and what to fix.
- For the whole site, check the Core Web Vitals report in Google Search Console.
Core Web Vitals thresholds
| Metric | Good | Needs improvement | Poor |
|---|---|---|---|
| LCP | 2.5 s or less | Up to 4 s | Over 4 s |
| INP | 200 ms or less | Up to 500 ms | Over 500 ms |
| CLS | 0.1 or less | Up to 0.25 | Over 0.25 |
Do Core Web Vitals affect rankings?
They are part of Google’s page experience signals, but relevance and content quality matter much more. Think of them as a tie-breaker and, more importantly, a conversion factor: faster, stable pages keep more visitors and get more enquiries.
Fix tools
Check page size with the page weight budget calculator, preload the hero image with the preload tag generator, and add lazy loading below the fold with the lazy load code generator.
More free tools and guides
Practise tools like this on real projects in our digital marketing course in Faridabad, with weekday, weekend and online batches.
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Frequently Asked Questions
Is this Core Web Vitals checker free?
Yes. It is free with no sign-up and works in your browser.
What are the three Core Web Vitals?
LCP for loading, INP for responsiveness, and CLS for visual stability.
Why are my lab and field results different?
Lab data is one simulated test. Field data comes from real Chrome users over 28 days, which Google uses for assessment.
Did INP replace FID?
Yes. INP replaced First Input Delay as a Core Web Vital in March 2024.