Page Speed Checker

Test your website speed and Core Web Vitals for mobile and desktop. Powered by Google PageSpeed Insights the same tool Google uses to measure ranking signals.

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What Core Web Vitals mean for your ranking

LCP under 2.5s — Largest Contentful Paint measures how fast your main content loads. Google wants it under 2.5s — above 4s is a ranking penalty.

CLS under 0.1 — Cumulative Layout Shift measures visual stability. Pages that jump around as they load frustrate users and get penalised.

TBT under 200ms — Total Blocking Time reflects interactivity. High TBT means JavaScript is blocking the main thread — your page feels frozen.

Mobile score matters more — Google indexes the mobile version of your site first. A desktop score of 95 doesn't help if mobile is 40.

Frequently asked questions

Does page speed affect SEO rankings?

Yes. Google uses Core Web Vitals (LCP, CLS, INP) as ranking signals since 2021. Pages with poor CWV scores are at a disadvantage vs. equivalent content on faster pages.

What's a good PageSpeed score?

90–100 is good, 50–89 needs improvement, 0–49 is poor. Aim for 90+ on desktop and 70+ on mobile. Mobile is harder due to slower connections and devices.

Why is my mobile score so much lower?

Mobile scores are assessed on a simulated 4G connection with a mid-tier device. Large images, render-blocking scripts, and unoptimised fonts hit mobile much harder than desktop.

How do I fix a slow LCP?

Preload your hero image, use a CDN, switch to WebP format, and ensure your server response time (TTFB) is under 200ms. LCP is almost always caused by large images or slow servers.

Speed is just one ranking factor

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