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Page Speed & Core Web Vitals

Page Speed & Core Web Vitals

Enter your URL to measure your performance score and Core Web Vitals (LCP, INP, CLS) using Google PageSpeed Insights data.

What is Page Speed & Core Web Vitals?

This tool uses Google PageSpeed Insights data to measure your page's loading performance with a 0–100 score and the three core web vitals (LCP, INP, CLS). Page speed is a factor that directly affects both user experience and Google rankings.

How to use it

  1. 1Enter the full address of the page you want to measure.
  2. 2Pick mobile or desktop and press 'Analyze' (results arrive within 15-30 s).
  3. 3Review the performance score and LCP/INP/CLS values; fix the 'poor' ones first.

Core Web Vitals thresholds

LCP ≤ 2.5 s
Largest content — Time for the page's main content to become visible. Under 2.5 s is considered 'good'.
INP ≤ 200 ms
Interaction response — Response time to clicks or taps. Under 200 ms is considered 'good'.
CLS ≤ 0.1
Visual stability — How much elements shift while the page loads. Under 0.1 is considered 'good'.

Frequently asked questions

What's the difference between field and lab data?

Field data is collected from real users (Chrome) who visited your site over the last 28 days and requires enough traffic. Lab data is a controlled, instant simulation; low-traffic pages show only lab data.

Does page speed affect SEO?

Yes. Core Web Vitals are among Google's official ranking signals. Fast, stable pages offer a better user experience, are abandoned less and gain a ranking advantage.

How do I improve my score?

Compress images and switch to modern formats (WebP/AVIF), reduce unnecessary JavaScript, use caching, optimize fonts and choose fast hosting/a CDN.

Why does the result change slightly each time?

Lab measurements can show small fluctuations depending on network and server conditions. Measuring the same page a few times helps you see the trend.