Page speed test
Check your page's performance on mobile and desktop.
About this check
What's included
Four Lighthouse scores, two devices
Performance, accessibility, best practices and SEO, each 0–100, on a simulated mobile device and on desktop.
Lab and real-user metrics
Largest Contentful Paint, Cumulative Layout Shift and Total Blocking Time from the lab run, plus real-user LCP, INP and CLS from the Chrome UX Report when the page has enough traffic.
The page, not just the homepage
Paste any URL. A slow pricing page costs more than a fast homepage, and the test measures the address you give it.
Common questions
Why does mobile score lower than desktop?
The mobile test simulates a slower device and connection than the desktop test. Both help diagnose performance. Lighthouse scores are lab measurements, not a direct measure of Google rankings.
Why does the score change between runs?
Lab scores vary a few points with network and server conditions. Real-user data, when shown, is a 28-day rolling picture and moves much less.
I fixed something. Can I test again?
Results are cached for one hour, including reports where one device test did not finish. After that, the next check runs a new test.