Page Speed Checker
Check Google PageSpeed Insights scores and Core Web Vitals for any public URL with our free page speed checker. Get Performance, Accessibility, Best Practices, and SEO scores powered by Google Lighthouse, plus detailed metrics like LCP, CLS, TBT, and FCP with optimization opportunities - no signup required.
Enter any public URL to fetch Google PageSpeed Insights scores and Core Web Vitals. Results include Performance, Accessibility, Best Practices, and SEO scores, plus detailed metrics like LCP, CLS, TBT, and FCP - powered by the Google Lighthouse engine.
Enter any public URL - https:// is added automatically if omitted
Mobile uses throttled network simulation
Results are fetched from the Google PageSpeed Insights API v5, which runs a Lighthouse audit on the target URL from Google's servers. Analysis typically takes 15-30 seconds. The URL must be publicly accessible - localhost and private network URLs are not supported.
Why Use Our Page Speed Checker?
Instant PageSpeed Insights Analysis
Our page speed checker fetches Google PageSpeed Insights scores for any public URL instantly. Get Performance, Accessibility, Best Practices, and SEO scores powered by the Google Lighthouse engine - no signup required.
Full Core Web Vitals Report
Our page speed checker displays all Core Web Vitals including LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), TBT (Total Blocking Time), FCP (First Contentful Paint), and Speed Index with pass/fail status.
Mobile and Desktop Analysis
Switch between mobile and desktop strategies to see how your page performs on both device types. Mobile analysis uses throttled network simulation to reflect real-world conditions for smartphone users.
Actionable Opportunities and Diagnostics
Beyond scores, our page speed checker surfaces specific optimization opportunities - unused JavaScript, render-blocking resources, unoptimized images - with estimated savings to help you prioritize improvements.
Common Use Cases for Page Speed Checker
Pre-Launch Website Auditing
Run a page speed check before launching a new website or landing page to identify performance bottlenecks. Our page speed checker surfaces Core Web Vitals issues before they affect real users and search rankings.
SEO Performance Optimization
Google uses Core Web Vitals as a ranking signal. Use our page speed checker to measure LCP, CLS, and FCP scores and identify specific improvements that can boost your search engine rankings.
Competitor Benchmarking
Check the page speed of competitor websites to benchmark your performance against industry standards. Our page speed checker lets you analyze any public URL to understand where you stand.
E-Commerce Conversion Optimization
Slow page load times directly reduce conversion rates. Use our page speed checker to identify performance issues on product pages, checkout flows, and landing pages that may be costing you sales.
Developer Performance Testing
Developers use our page speed checker to validate performance improvements after deploying optimizations. Compare before and after scores for image compression, code splitting, and caching changes.
Client Reporting & Proposals
Web agencies and consultants use our page speed checker to generate performance data for client reports and proposals. Quickly pull PageSpeed Insights scores for any client website without leaving the browser.
Understanding Page Speed and Core Web Vitals
What is a Page Speed Checker?
A page speed checker is a tool that analyzes the loading performance of a web page and reports metrics that affect user experience and search engine rankings. Our page speed checker uses the Google PageSpeed Insights API v5, which runs a full Lighthouse auditon the target URL from Google's servers and returns scores across four categories: Performance, Accessibility, Best Practices, and SEO. The Performance score is calculated from a weighted combination of Core Web Vitals and other timing metrics, giving you a single 0-100 number that reflects the overall loading experience for real users.
How Our Page Speed Checker Works
- Enter a URL: Type or paste any public URL into the input field. Our page speed checker automatically adds
https://if omitted. Choose between mobile (throttled network) or desktop strategy. - Google Lighthouse Analysis:Click Check Page Speed and the tool sends a request to the Google PageSpeed Insights API. Google's servers load the page in a controlled environment and run a full Lighthouse audit. This typically takes 15-30 seconds.
- Review Your Results: View your Lighthouse scores as visual score rings, Core Web Vitals with pass/fail status, optimization opportunities with estimated savings, and diagnostic metrics to help you prioritize improvements.
Core Web Vitals Explained
- LCP (Largest Contentful Paint): Measures how long it takes for the largest visible content element to load. Good: under 2.5s. Poor: over 4s. Directly impacts perceived load speed.
- CLS (Cumulative Layout Shift): Measures visual stability - how much page elements shift unexpectedly during loading. Good: under 0.1. Poor: over 0.25. Affects user experience and accidental clicks.
- TBT (Total Blocking Time): Measures the total time the main thread was blocked long enough to prevent input response. Good: under 200ms. Poor: over 600ms. Correlates with FID (First Input Delay) in the field.
- FCP (First Contentful Paint): Measures when the first text or image is painted. Good: under 1.8s. Poor: over 3s. Indicates when users first see something meaningful on the page.
Understanding PageSpeed Scores
PageSpeed Insights scores range from 0 to 100. Scores of 90-100 are Good (green), 50-89 Need Improvement (orange), and 0-49 are Poor (red). The Performance score is a weighted average of six metrics: FCP (10%), Speed Index (10%), LCP (25%), TBT (30%), CLS (15%), and Time to Interactive (10%). Mobile scores are typically lower than desktop scores because mobile analysis simulates a slower network (4G) and less powerful CPU. A score of 50 on mobile is often equivalent to a score of 80 on desktop for the same page.
Related Tools
DMARC Record Checker
Check DMARC records for any domain via Cloudflare DNS-over-HTTPS. Validate email authentication policy (none/quarantine/reject), analyse alignment settings (adkim, aspf), and extract reporting addresses (rua, ruf) - free online DMARC record checker.
DNS Leak Test
Check if DNS queries and WebRTC are leaking your real IP outside your VPN tunnel. Detects local IPs via WebRTC STUN requests, checks public IP and geolocation via free APIs, and identifies DNS resolvers - free online DNS leak test.
DNS Record Comparator
Compare DNS records across Cloudflare, Google, and Quad9 nameservers automatically. Detects differences in A, MX, NS, CNAME, TXT, AAAA, and SOA records with severity indicators - free online DNS comparison tool.
Reverse DNS Lookup
Look up PTR records for any IPv4 or IPv6 address via Cloudflare DNS-over-HTTPS. Instantly find the hostname behind any IP address with DNSSEC validation status and query time - free online reverse DNS lookup tool.
Frequently Asked Questions About Page Speed Checker
A page speed checker is a tool that analyzes the loading performance of a web page and reports metrics that affect user experience and search rankings. Our page speed checker uses the Google PageSpeed Insights API to run a full Lighthouse audit and return Performance, Accessibility, Best Practices, and SEO scores for any public URL.
A page speed check typically takes 15-30 seconds. Google's servers load the target URL in a controlled environment and run a full Lighthouse audit, which includes loading all page resources, executing JavaScript, and measuring timing metrics. Complex pages with many resources may take longer.
Mobile analysis simulates a mid-tier Android device on a throttled 4G network connection with a slower CPU. Desktop analysis uses a faster network and CPU. Mobile scores are typically 20-40 points lower than desktop scores for the same page. Google uses mobile scores as the primary signal for search ranking.
PageSpeed Insights runs Lighthouse from Google's servers in a controlled environment, while Chrome DevTools runs Lighthouse on your local machine with your actual network and hardware. Results can differ due to server location, network conditions, CPU throttling settings, and browser extensions. The PageSpeed Insights score reflects a standardized, reproducible measurement.
Core Web Vitals are a set of metrics defined by Google that measure real-world user experience: LCP (loading), CLS (visual stability), and TBT/FID (interactivity). Google uses Core Web Vitals as a ranking signal in search results. Pages that pass Core Web Vitals thresholds may receive a ranking boost over pages with poor scores.
You can check any publicly accessible URL. The URL must be reachable from Google's servers - localhost, private network addresses, and password-protected pages are not supported. Pages that require authentication or block Google's crawlers may return errors or inaccurate results.
Yes! Our page speed checker is 100% free with no signup, no account, and no usage limits. Check as many URLs as you need - completely free, forever. Results are powered by the Google PageSpeed Insights API.
The Opportunities section in the results shows specific improvements with estimated savings. Common improvements include eliminating render-blocking resources, deferring unused JavaScript, optimizing images (using WebP format and proper sizing), enabling text compression (gzip/brotli), and leveraging browser caching. Focus on the highest-impact opportunities first.
PageSpeed Insights scores can vary slightly between runs due to network variability, server response time fluctuations, and the inherent variability of the Lighthouse measurement environment. For the most reliable results, run multiple checks and average the scores. Significant variations (more than 10 points) usually indicate real performance inconsistencies on the server.