Page Speed Checker
Test your website's load speed and Core Web Vitals — get actionable fixes to rank higher and convert better.
What is Page Speed Checker?
Page speed is a confirmed Google ranking factor for both desktop and mobile search, meaning faster pages rank higher than slower pages when all other signals are equal. Beyond rankings, speed directly affects user experience and conversion rates: studies by Google show that 53% of mobile users abandon a page that takes more than 3 seconds to load, and every 100ms delay in load time correlates with a 1% drop in conversions. Google's Core Web Vitals — Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) — are the specific metrics Google measures for the Page Experience ranking signal. This tool measures your page's real-world loading performance, reports Core Web Vitals scores against Google's thresholds (Good/Needs Improvement/Poor), and provides prioritised recommendations for the improvements that will have the largest impact.
How to Use Page Speed Checker
- 1
Enter Your Page URL
Paste any live URL. The tool runs a performance audit using Google's Lighthouse engine, measuring load time from a standard network and device configuration.
- 2
Review Performance Scores
Receive scores for the three Core Web Vitals (LCP, INP, CLS) plus Total Blocking Time, First Contentful Paint, and an overall Performance score (0–100).
- 3
Implement Recommendations
Get prioritised improvement recommendations ranked by estimated impact — from image optimisation and unused JavaScript removal to server response time improvements.
Use Cases
Pre-Launch Performance Baseline
Before launching a new website or major redesign, establish performance baselines across all key page templates (homepage, product page, blog post, checkout). Fix any issues that score "Poor" before launch — it is far easier to optimise a page before it has live traffic than to make changes to a production site serving real users.
Diagnosing Ranking Drops
If a previously well-ranking page drops in position after a site update, poor Core Web Vitals (particularly a worsened LCP or CLS regression) may be the cause. Run the page through the speed checker before and after the update to identify if performance changed and what specifically degraded.
Comparing Against Competitors
Run your key pages and your top competitors' equivalent pages through the speed checker to benchmark your performance. If a competitor scores 90+ on mobile and you score 45, speed is likely contributing to their ranking advantage — and closing that gap is one of the fastest wins in technical SEO.
Features
Core Web Vitals Measurement
Reports Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) against Google's Good/Needs Improvement/Poor thresholds.
Waterfall Chart
Visual resource loading waterfall showing exactly when each asset (HTML, CSS, JS, images, fonts) loads and how long each takes — pinpoints bottlenecks precisely.
Resource Size Analysis
Breaks down page weight by resource type, identifying oversized JavaScript bundles, uncompressed images, and render-blocking CSS that slow initial load.
Mobile vs Desktop Comparison
Run the same URL on simulated mobile (throttled 4G) and desktop connections to identify mobile-specific performance issues that may only surface on slower connections.
Frequently Asked Questions
Google's Lighthouse scores pages from 0–100. A score of 90–100 is "Good", 50–89 is "Needs Improvement", and 0–49 is "Poor". For Core Web Vitals specifically: LCP should be under 2.5 seconds (Good), 2.5–4.0s needs improvement, over 4.0s is Poor. CLS should be under 0.1 (Good). INP should be under 200ms (Good). The overall Performance score aggregates multiple metrics, but Core Web Vitals are the metrics that directly feed into Google's Page Experience ranking signal.
Lab-based speed tests (like Lighthouse) have natural variability — network conditions, server load, and test infrastructure all introduce small differences between runs. A ±5 point swing is normal. For consistent results, run tests 3–5 times and average the scores. More importantly, Google's ranking uses field data (real user measurements collected via Chrome) through the Chrome UX Report, not lab tests. Lab scores guide optimisation; field data affects rankings. Monitor both for a complete picture.
Largest Contentful Paint is dominated by three factors: server response time (how long it takes to receive the first byte of HTML), render-blocking resources (large CSS and JS that delay when the browser can start rendering), and the LCP element's resource load time (usually the hero image). The highest-impact improvements are: using a CDN to reduce server response time, preloading your LCP image with <link rel="preload">, optimising image format and size (WebP instead of PNG/JPEG), and eliminating render-blocking JS. These four changes alone can move most pages from "Poor" to "Good".
Yes, significantly. Server response time (Time to First Byte or TTFB) is directly affected by your hosting infrastructure. Shared hosting on congested servers can have TTFB of 500ms–2000ms, while a well-configured VPS or cloud hosting with server-side caching typically achieves under 200ms. A CDN (Content Delivery Network) serves your static assets from edge servers geographically close to each user, often cutting load times by 50–70% for international visitors. Hosting is often the fastest single improvement you can make to page speed.
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