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Page Speed Checker

Opens Google PageSpeed Insights in a new tab — the industry-standard tool for measuring Core Web Vitals and getting actionable improvement suggestions.

Core Web Vitals Reference

LCPLargest Contentful Paint
Good: ≤ 2.5sNeeds work: 2.5s – 4.0sPoor: > 4.0s

Measures loading performance. Marks the point when the largest text or image element is rendered.

INPInteraction to Next Paint
Good: ≤ 200msNeeds work: 200ms – 500msPoor: > 500ms

Measures responsiveness. Reports the latency of all click, tap, and keyboard interactions.

CLSCumulative Layout Shift
Good: ≤ 0.1Needs work: 0.1 – 0.25Poor: > 0.25

Measures visual stability. Quantifies unexpected layout shifts that occur during the page's lifecycle.

FCPFirst Contentful Paint
Good: ≤ 1.8sNeeds work: 1.8s – 3.0sPoor: > 3.0s

Measures when the browser renders the first piece of DOM content after a user navigates to the page.

TTFBTime to First Byte
Good: ≤ 800msNeeds work: 800ms – 1.8sPoor: > 1.8s

Measures the time it takes the server to respond to a request with the first byte of a response.

Quick Optimization Tips

Images

  • •Use modern formats (WebP, AVIF) — save 25–50% over JPEG/PNG
  • •Set explicit width/height attributes to avoid layout shifts
  • •Lazy-load below-the-fold images with loading="lazy"

JavaScript

  • •Remove unused JavaScript — use code splitting and tree-shaking
  • •Defer non-critical scripts with defer or async attributes
  • •Minify and compress JS bundles

CSS

  • •Inline critical CSS and defer the rest
  • •Remove unused CSS rules
  • •Avoid render-blocking stylesheets in <head>

Server

  • •Enable HTTP/2 or HTTP/3
  • •Use a CDN for static assets
  • •Add proper Cache-Control headers

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About Page Speed Checker

The Page Speed Checker measures your web page's loading performance and provides actionable recommendations to make it faster. It evaluates key metrics like Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift that directly impact user experience and search rankings. Website owners, developers, and SEO teams use it to diagnose bottlenecks and prioritize performance improvements.

Key Features

  • Measures Core Web Vitals including LCP, FID, CLS, and TTFB
  • Separate performance scores for mobile and desktop environments
  • Prioritized list of optimization opportunities with estimated time savings
  • Waterfall chart showing resource loading sequence and blocking requests
  • Screenshot timeline capturing visual progress of the page load
  • Historical tracking to compare performance before and after optimizations

How to Use Page Speed Checker

  1. 1

    Enter the page URL

    Paste the full URL of the page you want to analyze. Make sure to test the live production URL rather than a staging or localhost address.

  2. 2

    Select the test environment

    Choose between mobile and desktop analysis, or run both to see how performance differs across device types.

  3. 3

    Review the performance score

    Check the overall score from 0 to 100 and examine individual Core Web Vitals metrics to see which ones pass or need improvement.

  4. 4

    Analyze the recommendations

    Read through the prioritized list of suggestions, such as compressing images, deferring unused JavaScript, or improving server response times.

  5. 5

    Implement fixes and re-test

    Address the highest-impact recommendations first, then re-run the checker to measure the improvement and verify your changes had the desired effect.

Common Use Cases

Pre-launch performance auditing

Test your website before launch to identify and fix performance issues while changes are still easy to make, ensuring a fast experience from day one.

Core Web Vitals compliance

Monitor and improve LCP, FID, and CLS scores to meet Google's page experience requirements, which influence search rankings and visibility.

E-commerce conversion optimization

Speed up product and checkout pages where every extra second of load time directly correlates with lower conversion rates and increased cart abandonment.

Why Use Our Page Speed Checker

While Google PageSpeed Insights requires navigating to a separate site and interpreting raw data, this tool delivers Core Web Vitals scores, prioritized fix recommendations, and visual load timelines in one clean interface. Test both mobile and desktop instantly, track historical performance, and act on the highest-impact improvements without juggling multiple diagnostic tools.

Performance Data Stays on Your Terms

Your tested URLs and performance metrics are not stored in any shared database or public benchmark. Competitors cannot look up your speed scores or optimization weaknesses, and your performance audit history remains visible only to you.

Frequently Asked Questions

What is a good page speed score?
A score of 90 or above is considered good, 50-89 needs improvement, and below 50 is poor. Focus on the individual Core Web Vitals metrics rather than the overall score alone, since a single slow metric can significantly impact user experience.
Why is my mobile score much lower than desktop?
Mobile tests simulate a mid-tier device on a slower network connection, so they are more demanding than desktop tests. Large images, unminified JavaScript, and render-blocking resources have a much greater impact on mobile performance.
How does page speed affect SEO?
Google uses page experience signals, including Core Web Vitals, as ranking factors. Slow pages also see higher bounce rates and lower engagement, which indirectly hurts rankings. Improving speed benefits both user experience and organic search visibility.

Last updated: April 6, 2026