GOOGLE LIGHTHOUSE ENGINE • CORE WEB VITALS • ZERO SIGN-UP

Free Website PageSpeed Analyzer

Enter any URL to get an authoritative performance audit powered by Google Lighthouse and senior architectural analysis. Every metric, blocking resource, and exact code-level remediation with a downloadable PDF report.

Audit Mode:

Why PageSpeed Directly Impacts Growth & Revenue

Google Search Rankings

Core Web Vitals are an official Google ranking factor. Slow websites lose ranking positions and precious organic search visibility.

Revenue & Conversion Rates

Amazon calculated that every 100ms of latency costs 1% in direct sales. Faster page loads directly boost conversion rates and checkout completion.

User Retention & Bounce Rate

Over 50% of mobile users abandon pages that take longer than 3 seconds to render. Speed is fundamental to retaining customers.

Lighthouse Diagnostic Metrics Analyzed

Largest Contentful Paint (LCP) — Main viewport render speed

First Contentful Paint (FCP) — Initial paint timeline

Cumulative Layout Shift (CLS) — Visual stability & layout integrity

Total Blocking Time (TBT) — Main thread responsiveness

Speed Index — Progressive visual load progression

Time to Interactive (TTI) — Full thread readiness

Server Response Time (TTFB) — Backend latency & DNS overhead

Render-Blocking Resources — Critical CSS & synchronous scripts

Next-Gen Image Compression — WebP, AVIF, and srcset sizing

JavaScript Execution Overhead — V8 CPU compile & parse bottlenecks

Third-Party Script Auditing — External tags, analytics, and trackers

HTTP Cache Policy Analysis — Static asset TTL headers

DOM Complexity & Depth — Document tree rendering efficiency

Architectural Recommendations — Precise code-level remediation

Framework & CMS Detection — WordPress, Shopify, React, Next.js

Downloadable Executive PDF — Formatted report for your stakeholders

Frequently Asked Questions

Is this performance tool completely free?

Yes, 100% free with no account creation or credit card required. It connects directly to Google's PageSpeed Insights Lighthouse infrastructure.

How accurate is this analysis?

This tool runs on Google Lighthouse — the exact enterprise standard used by Chrome DevTools and Google Search Console. The audit numbers reflect genuine laboratory metrics.

What is considered a passing PageSpeed score?

Scores between 90-100 represent green/good performance, 50-89 indicates room for improvement, and below 50 is poor. Aiming for 90+ on both mobile and desktop maximizes SEO authority.

How do I remediate low scores?

Key fixes include modernizing image formats, optimizing font loading, deferring non-critical scripts, implementing edge caching, and minimizing CSS bundles. The report provides tailored instructions.

Does site speed directly affect Google rankings?

Yes. Core Web Vitals (LCP, INP, CLS) are verified Google search algorithm ranking signals, particularly for mobile search results.