Page Speed & Core Web Vitals Checker
Test your website's performance with Google PageSpeed Insights. Get Core Web Vitals scores, performance metrics, and optimization opportunities.
What Are Core Web Vitals?
Core Web Vitals are a set of real-world, user-centered metrics that measure loading performance, interactivity, and visual stability. Google uses these as ranking factors, making them critical for SEO.
Measures loading performance. LCP should occur within 2.5 seconds of page load.
Measures responsiveness. INP should be 200 milliseconds or less for good user experience.
Measures visual stability. CLS should be less than 0.1 to avoid unexpected layout shifts.
Frequently Asked Questions
What is a good PageSpeed score?
A score of 90-100 is considered good, 50-89 needs improvement, and below 50 is poor. Mobile scores are typically lower than desktop because of more constrained conditions. Focus on fixing the biggest opportunities first.
Does page speed affect SEO?
Yes. Google confirmed page experience (including Core Web Vitals) as a ranking factor. Slow pages have higher bounce rates, lower engagement, and fewer conversions — all of which impact rankings indirectly too.
What is the difference between lab data and field data?
Lab data comes from Lighthouse running in a controlled environment (simulated throttling). Field data (CrUX) comes from real Chrome users visiting your site. Field data is more representative but requires enough traffic to generate metrics.
How do I improve my page speed?
Common fixes: optimize and compress images, minify CSS/JS, enable text compression (gzip/brotli), reduce render-blocking resources, lazy-load offscreen images, use a CDN, and reduce server response time. Our full scanner provides specific recommendations.