Free SEO tool
Website speed test
Test how fast any website loads. Get the Google PageSpeed performance score and Core Web Vitals (LCP, CLS, FCP, TBT) for mobile and desktop. Free, no signup.
Why site speed matters
Speed is both a ranking factor and a conversion factor. Google uses Core Web Vitals as a signal, and real users bounce when pages are slow: every extra second of load time measurably drops conversions. This test runs a full Lighthouse analysis through Google PageSpeed Insights and shows the lab metrics that move your score, so you know exactly what to fix first.
FAQ
- What is a good website speed score?
- On Google PageSpeed, 90-100 is fast (green), 50-89 needs work (orange), and 0-49 is slow (red). Aim for 90+ on mobile, since mobile is what Google indexes and most visitors use.
- What are Core Web Vitals?
- Three user-experience metrics Google uses as a ranking signal: Largest Contentful Paint (LCP, load speed, good under 2.5s), Cumulative Layout Shift (CLS, visual stability, good under 0.1), and Interaction to Next Paint / Total Blocking Time (responsiveness). This test reports LCP, CLS, FCP and TBT.
- Why is my mobile score lower than desktop?
- PageSpeed tests mobile on a throttled connection and a slower simulated device, which is realistic for real users. A big gap usually means heavy JavaScript, large images, or render-blocking resources hurting phones most.
- How do I make my website faster?
- Compress and lazy-load images, serve modern formats (WebP/AVIF), cut and defer unused JavaScript, use a CDN, and set a fast largest element (usually the hero image or heading). Fix the biggest LCP and TBT offenders first.