Page Speed Analyzer — Help & Documentation
Measure your website's Core Web Vitals (LCP, FID, CLS, FCP) and get actionable recommendations to improve performance for both mobile and desktop.
Features
- Analyze both mobile and desktop performance
- Detailed Core Web Vitals analysis (LCP, FID, CLS, FCP)
- Image, CSS, and JavaScript optimization analysis
- Caching and compression checks
- Actionable recommendations for improvement
How to Use
Enter the URL you want to test.
Select the device — Mobile, Desktop, or both.
Choose analysis options like image and CSS analysis.
Click "Analyze Page Speed" to start the test.
Review the results including performance scores, Core Web Vitals, and optimization opportunities.
Core Web Vitals Explained
Largest Contentful Paint
Measures loading performance.
Should be below 2.5 seconds.
First Input Delay
Measures interactivity.
Should be below 100 milliseconds.
Cumulative Layout Shift
Measures visual stability.
Should be less than 0.1.
First Contentful Paint
Measures the time to first content render.
Should be below 1.8 seconds.
Best Practices
- Test your most important pages regularly, not just the homepage.
- Pay close attention to mobile performance, as it is a key ranking factor.
- Use the recommendations to create a prioritized list of performance improvements.
- Compress images and use modern formats like WebP to improve LCP.
- Implement browser caching to speed up load times for returning visitors.
Quick Tips
Image Optimization: Compressing images and using modern formats like WebP can significantly improve your LCP score.
Caching: Implement browser caching to speed up load times for returning visitors.
Mobile First: Google uses mobile-first indexing, so prioritize mobile performance in your optimization efforts.