Core Web Vitals Analyzer
Enter your LCP, INP and CLS numbers from PageSpeed Insights or Search Console and instantly see which metrics pass Google's published "Good" thresholds.
Enter measured values from PageSpeed Insights, Chrome DevTools, or Google Search Console — this tool grades the numbers you provide against Google's published Core Web Vitals thresholds; it does not crawl or measure your site itself.
Grading results
How to use this tool
- 1Run your page through PageSpeed Insights or check Search Console for your LCP, INP and CLS values.
- 2Enter those three measured values into this tool.
- 3Review each metric's grade and the overall pass/fail verdict.
Example use cases
Pre-launch performance check
A developer checks PageSpeed Insights results against Google's thresholds before pushing a redesign live.
Monthly vitals tracking
An SEO team logs their Search Console field data into this tool each month to track whether pages stay in the "Good" range.
Frequently asked questions
Does this tool measure my site directly?
No — browsers block cross-origin performance measurement, so this tool grades numbers you already measured with PageSpeed Insights, Chrome DevTools or Search Console.
Where do these thresholds come from?
They are Google's officially published Core Web Vitals thresholds: LCP ≤2.5s, INP ≤200ms, and CLS ≤0.1 for a "Good" rating.
Do Core Web Vitals affect rankings?
Yes, they are part of Google's page experience signals, though content relevance still matters far more for rankings overall.