Page Speed Insights
Overview
The Page Speed Insights tool provides comprehensive website performance analysis with real-time metrics, helping developers identify bottlenecks and optimize load times for better user experience.
This professional-grade analyzer measures Core Web Vitals (LCP, INP, CLS), generates performance grades, and delivers actionable insights with detailed breakdowns of resource loading, render-blocking requests, and optimization opportunities—all without leaving your browser.
Key Features
- Real-time Core Web Vitals measurement (LCP, INP, CLS, FCP, TTFB)
- Performance grade calculation with A-F scoring system
- Mobile and desktop device simulation for accurate testing
- Comprehensive performance insights with severity indicators
- Render-blocking resource detection and analysis
- Image optimization recommendations with estimated savings
- Unused CSS and JavaScript identification
- Cache policy analysis and suggestions
- Content breakdown by file type and domain
- Resource waterfall visualization with loading timeline
- HTTP response code analysis
- Third-party script impact assessment
- DOM size optimization recommendations
- LCP element discovery and breakdown analysis
- Layout shift culprit identification
- Network dependency tree visualization
- Best practices and security checks (CSP, HSTS, COOP)
- SEO validation with structured data checks
- Detailed file request analysis with size and duration
- Export reports to PDF or copy for sharing
- Visual performance comparison between mobile and desktop
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