Test Your Website Speed
Get a performance score, Core Web Vitals analysis, and actionable optimization tips for any website. Free, no signup.
Why Website Speed Matters
Page speed directly impacts user experience, conversion rates, and search engine rankings. Google uses Core Web Vitals (LCP, FID, CLS) as ranking factors. A 1-second delay in load time can reduce conversions by 7% and page views by 11%. Amazon found that every 100ms of latency cost them 1% in sales.
Understanding Core Web Vitals
Largest Contentful Paint (LCP) measures loading performance — aim for under 2.5 seconds. First Input Delay (FID) / Total Blocking Time (TBT) measures interactivity — aim for under 200ms. Cumulative Layout Shift (CLS) measures visual stability — aim for under 0.1. These three metrics together determine your Core Web Vitals assessment in Google Search Console.
How to Improve Your Score
The most impactful optimizations include: serving images in next-gen formats (WebP, AVIF), enabling text compression (Brotli), minimizing JavaScript execution time, preloading critical resources, using a CDN, implementing proper cache headers, and lazy loading below-the-fold content. Our tool provides specific, actionable recommendations based on your site's actual performance profile.