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Free PageSpeed Insights Checker - Core Web Vitals

Paste a URL to run Google PageSpeed Insights. See Performance, Accessibility, Best Practices, and SEO scores, lab metrics (LCP, CLS, TBT), and Chrome UX Report field data when Google has enough samples.

Core Web Vitals

Google PageSpeed Insights

Live Lighthouse scores plus Chrome UX Report field data when Google has enough samples. Mobile or desktop.

Runs Google PageSpeed Insights (Lighthouse) from our server. Lab scores are a single test, not 28-day field data. Takes 15-40 seconds.

How to use

How to use PageSpeed

  1. 1

    Paste a public URL

    Homepage or a key landing page. Localhost is blocked.

  2. 2

    Pick mobile or desktop

    Mobile is the default - that is what most founders need to pass.

  3. 3

    Read lab vs field

    Fix the largest lab savings first, then confirm field LCP/INP/CLS once you have traffic.

Guide

How to read a PageSpeed Insights report

Google runs Lighthouse on the URL from their lab. The Performance score is a weighted blend of FCP, LCP, TBT, CLS, and Speed Index - not a ranking factor by itself. Core Web Vitals in Search Console use field data, not this one lab run.

Treat 90+ as good, 50-89 as needs work, and below 50 as poor - the same bands Google uses. A single run can swing 5-10 points. Re-test after a deploy rather than chasing one point.

Field data appears only when Chrome UX Report has enough samples for that URL (or the origin). New launches often have lab scores only. That is expected, not a tool failure.

This is the official PageSpeed Insights API, not a local Lighthouse install. Results should match pagespeed.web.dev for the same URL and strategy.

Explore more on free ScrollLaunch tools, browse DR-ranked directories, or launch with a dofollow backlink.

Questions

PageSpeed FAQ

What is a PageSpeed Insights check?

Google loads the URL in Lighthouse and returns Performance, Accessibility, Best Practices, and SEO scores, plus lab metrics (LCP, CLS, TBT). If the URL has enough Chrome traffic, you also get 28-day field data.

Why is lab different from field data?

Lab is one simulated run (device + network Google chose). Field is real Chrome users over ~28 days. A marketing site can score 90 in lab and still have a slow LCP in the field.

Does this replace Google's official tool?

Same API as pagespeed.web.dev. Use this for a quick founder check, then the official report for the full audit tree. Pair with the website SEO checker for title and meta.

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