Free tool
Mobile-Friendly Test
Run the mobile-friendly test
Free, no sign-up. You get the full LaunchSafer report, including the checks below, in 30–90 seconds.
What makes a page mobile-friendly
The page must declare a responsive viewport (width=device-width) so phones don't render a shrunken desktop layout, and it must not block pinch-zoom, which people with low vision rely on.
It also has to be fast on a mid-range phone over a mobile connection. That's why the mobile Lighthouse score and Core Web Vitals (LCP, CLS and TBT) are part of this test.
Mobile performance, measured, not estimated
Performance numbers come from Google PageSpeed Insights, which runs Lighthouse on Google's servers with a simulated mobile device. If the measurement fails, LaunchSafer says so and leaves it out of the score; it never estimates numbers.
Frequently asked questions
Is Google's Mobile-Friendly Test still available?
No. Google retired it in December 2023 and points people to Lighthouse, which is what LaunchSafer uses for its mobile measurements.
What is a good mobile Lighthouse score?
90 or above is considered good, 50–89 needs improvement, and below 50 is poor.
Do you test on a real phone?
No. Lighthouse simulates a mid-range phone and slower network. Where Google has enough real-user data, the report also shows field data from real Chrome users.