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Page Speed Test & Core Web Vitals

Test speed and Core Web Vitals scores

About Page Speed Test & Core Web Vitals

Test your page speed and Core Web Vitals performance. Get LCP, INP, CLS scores with real Chrome user data (CrUX) and Lighthouse lab data. Actionable optimization recommendations.

Frequently Asked Questions

What Core Web Vitals should I optimize first?

Focus on LCP (Largest Contentful Paint) first - it has the biggest ranking impact. Then CLS (Cumulative Layout Shift) as it's often easiest to fix with proper image dimensions. INP (Interaction to Next Paint) is important for interactive pages.

How does page speed affect SEO rankings?

Page speed is a confirmed Google ranking factor, especially on mobile. Pages that pass Core Web Vitals (LCP < 2.5s, INP < 200ms, CLS < 0.1) have a ranking advantage. Slow pages also hurt user engagement, increasing bounce rates.

What tools does Google recommend for speed testing?

Google recommends PageSpeed Insights (lab + field data), Chrome DevTools Lighthouse (detailed lab analysis), Chrome UX Report (real-world field data), and Web Vitals extension (real-time CWV monitoring). Use PageSpeed Insights for a comprehensive view.

What are good Core Web Vitals scores?

Google's thresholds: LCP under 2.5 seconds (good), INP under 200ms (good), CLS under 0.1 (good). Pages meeting all three thresholds get a ranking boost. Focus on LCP first — it has the largest impact on both rankings and user experience.

Why is my mobile score lower than desktop?

Mobile testing uses slower CPU throttling and 4G network simulation to represent real-world mobile conditions. Most users browse on mid-range devices, not flagships. Optimize for mobile first — it's what Google's mobile-first indexing evaluates.

How much does page speed affect rankings?

Page speed is a tiebreaker ranking factor, not a primary one. Extremely slow pages (LCP > 4s) are penalized. Meeting Core Web Vitals thresholds gives a small ranking boost. The bigger impact is on user behavior — fast pages convert significantly better.

How to Use Page Speed Test & Core Web Vitals

  1. 1

    Enter the URL you want to test

  2. 2

    Select device type: Desktop or Mobile

  3. 3

    Click 'Test Speed' to run the analysis via Lighthouse

  4. 4

    Review Core Web Vitals: LCP, FID/INP, CLS scores

  5. 5

    Check the performance breakdown and opportunity list

  6. 6

    Implement the prioritized recommendations to improve speed

Why Use Page Speed Test & Core Web Vitals?

Page speed is a confirmed Google ranking factor, and Core Web Vitals directly impact search visibility. Slow pages also have dramatically higher bounce rates — a 1-second delay reduces conversions by 7%. Our Page Speed Test analyzes your page against Google's own metrics and gives you a prioritized fix list.

Key Features

  • Core Web Vitals assessment (LCP, INP, CLS)
  • Lighthouse performance scoring
  • Desktop and mobile testing modes
  • Resource loading waterfall visualization
  • Specific optimization opportunities with estimated savings
  • Historical performance tracking