What is a page speed checker?

A page speed checker tests how fast your website loads by running a Google Lighthouse audit. It measures key performance metrics like Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Total Blocking Time (TBT), giving you a 0-100 performance score with actionable optimization tips.

What are Core Web Vitals?

Core Web Vitals are Google's metrics for measuring real-world user experience: LCP (Largest Contentful Paint) measures loading speed — good is under 2.5 seconds. CLS (Cumulative Layout Shift) measures visual stability — good is under 0.1. INP/TBT measures interactivity — good is under 200ms. These directly affect your Google search rankings.

What is a good page speed score?

A score of 90-100 is considered fast (green), 50-89 needs improvement (orange), and 0-49 is slow (red). Most websites score between 40-70 on mobile. Desktop scores are typically higher because desktop devices have more processing power. Focus on getting Core Web Vitals into the 'good' range for the best SEO impact.

Why is my mobile score lower than desktop?

Mobile scores are almost always lower because Google simulates a mid-tier mobile device on a slow 4G connection. This means slower CPU, less memory, and higher network latency. To improve mobile scores, focus on reducing JavaScript, optimizing images, and minimizing layout shifts.

Does page speed affect SEO rankings?

Yes, page speed is a confirmed Google ranking factor. Since 2021, Google uses Core Web Vitals as part of its page experience signals for ranking. Pages that pass all three Core Web Vitals thresholds get a ranking boost. Slow pages also have higher bounce rates, which indirectly hurts SEO.

Free Tool — No Signup Required

Page Speed Checker

Test your website speed with Google Lighthouse. Get performance scores, Core Web Vitals, and optimization recommendations for both mobile and desktop.

How It Works

Enter your URL

We send it to Google PageSpeed Insights API for a full Lighthouse audit.

We test both devices

Your page is analyzed for mobile and desktop performance, SEO, accessibility, and best practices.

Get actionable results

See Lighthouse scores, Core Web Vitals, and the top improvements to make your site faster.

Why Page Speed Matters

Page speed is a confirmed Google ranking factor for both mobile and desktop searches. Google's Core Web Vitals (LCP, CLS, INP) directly affect your search visibility and user experience.

Studies show that a 1-second delay in page load time leads to 7% fewer conversions, 11% fewer pageviews, and 16% lower customer satisfaction. Faster sites rank higher, convert better, and keep users engaged.

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