Free SEO tool · Technical
Page Speed Checker
Test any page with Google PageSpeed Insights and see the performance score, Core Web Vitals and the fixes that save the most time.
Uses Google PageSpeed Insights (Lighthouse). A test takes 15–40 seconds.
Core Web Vitals
Biggest opportunities
Core Web Vitals in plain words
- LCP (Largest Contentful Paint): how fast the main content appears. Aim for under 2.5 seconds.
- INP (Interaction to Next Paint): how quickly the page reacts to taps and clicks. Aim for under 200 ms.
- CLS (Cumulative Layout Shift): how much the page jumps while loading. Aim for under 0.1.
Quick wins for a faster site
- Compress and resize images, and serve them as WebP.
- Use a caching plugin and a CDN.
- Remove plugins and scripts you do not use.
- Set width and height on images and ads to stop layout shifts.
Frequently asked questions
Why is my mobile score lower than desktop?
The mobile test simulates a mid-range phone on a slower network, so the same page scores lower. Google mainly uses mobile performance.
What is the difference between lab and field data?
Lab data comes from one simulated test right now. Field data comes from real Chrome users over the last 28 days and is what Google uses for Core Web Vitals.
Why does the score change every time?
Network and server conditions vary between tests. Run it two or three times and look at the trend.
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