PageSpeed Insights Performance
Comprehensive performance analysis with Core Web Vitals, resource breakdown, and optimization opportunities.
Enter a URL to generate a full performance report
Frequently Asked Questions
01What is PageSpeed Insights?
PageSpeed Insights (PSI) is a Google tool that analyzes web page performance using Lighthouse. It provides a performance score (0-100), Core Web Vitals metrics, and actionable optimization recommendations for both mobile and desktop.
02What is the difference between PageSpeed Insights and Lighthouse?
PageSpeed Insights runs Lighthouse audits on Google's servers and adds real user data from CrUX (Chrome User Experience Report). Lighthouse in Chrome DevTools runs locally. PSI also provides field data showing how real users experience your page.
03Why is my mobile score lower than desktop?
PSI applies CPU throttling (4x slowdown) and network throttling for mobile tests, simulating a mid-range phone on 4G. Desktop tests use minimal throttling. This means JavaScript-heavy pages score significantly lower on mobile.
04How do I improve my PageSpeed Insights score?
Focus on the highest-impact metrics: reduce Total Blocking Time (30% weight) by code-splitting JavaScript, optimize Largest Contentful Paint (25%) by preloading key resources, and minimize Cumulative Layout Shift (25%) by setting image dimensions.