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Core Web Vitals Analyzer

Rate entered LCP, INP and CLS values and suggest the next focus.

Free browser toolRuns in your browserNo sign-up

LCP

green

INP

green

CLS

green

Next focus: All entered values meet good thresholds.

Enter field or lab values from PageSpeed Insights or Chrome. This is not a live measurement tool.

About the Core Web Vitals Analyzer

Core Web Vitals Analyzer classifies entered LCP, INP and CLS values using current good and poor thresholds.

Paste field or lab values from PageSpeed Insights, Chrome UX Report or DevTools; this page does not pretend to measure another site remotely.

Key features

  • LCP threshold rating
  • INP threshold rating
  • CLS threshold rating
  • Metric-specific next action

How to use

  1. 1Obtain LCP, INP and CLS from a trusted measurement source.
  2. 2Enter the values with the displayed units.
  3. 3Work first on a metric outside the good range and remeasure.

Examples

Use the Core Web Vitals Analyzer
Input: LCP 2.5 s, INP 200 ms, CLS 0.10
Output: All three at the good threshold

Evaluate the 75th percentile and mobile separately.

Frequently asked questions

Does this run a live PageSpeed test?
No. It interprets values you enter.
Should I use field or lab data?
Field data represents real users; lab data is useful for repeatable debugging. Use both appropriately.
Is my data uploaded?
No. Analysis and generation happen entirely in your browser.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.