Interactive Speed Analyzer
Test your page load performance, Core Web Vitals, and Lighthouse diagnostics.
Interactive Speed Analyzer
Test your page load performance, Core Web Vitals, and Lighthouse diagnostics.
Speed & Performance Checklist
Essential optimization practices to achieve peak Google PageSpeed and Core Web Vitals scores.
Edge CDN & Static Caching
Distribute static assets from edge locations nearest to users to bring TTFB under 50ms.
Modern Image Compression (WebP / AVIF)
Leverage next-gen image formats and responsive picture elements to reduce page payload by up to 60%.
Critical CSS & Script Deferral
Defer non-critical JavaScript to eliminate main thread blocking and minimize Total Blocking Time (TBT).
Layout Stability (CLS Prevention)
Set explicit aspect ratios and dimensions on media containers to prevent unexpected layout shifts.
Core Web Vitals Technical Breakdown
Understand the key metrics Google uses to evaluate user experience and speed rankings.
Largest Contentful Paint (LCP)
Measures loading performance. To provide a good user experience, LCP should occur within 2.5 seconds.
Total Blocking Time (TBT)
Measures page load responsiveness. To provide a good user experience, TBT should be less than 150 milliseconds.
Cumulative Layout Shift (CLS)
Measures visual stability. To provide a good user experience, pages should maintain a CLS of 0.1 or less.
Time to First Byte (TTFB)
Measures server responsiveness. A TTFB of less than 200ms is considered excellent.
Recent Analysis Reports
Explore performance diagnostics ran by other users on our engine.