Mobile-Friendly Checker

Check whether a public URL works well on mobile — viewport setup, tap target sizing, text legibility, and content width — using Google's real Lighthouse engine.

Check a URL

This calls Google's public PageSpeed Insights API directly from your browser (mobile strategy) and reads its mobile-usability-related Lighthouse audits — nothing passes through our servers. Google retired its old standalone Mobile-Friendly Test tool; this is the closest real equivalent still available today. Grab a free API key from Google Cloud Console if you hit the keyless rate limit.
Runs the real Lighthouse mobile audit — the same engine behind Chrome DevTools.

About this tool

This calls Google's own PageSpeed Insights API directly from your browser, running a real mobile Lighthouse audit against the URL you enter, and then pulls out the specific checks that matter for mobile usability: viewport configuration, tap target sizing, legible font sizes, and content that fits the screen width without horizontal scrolling. Google retired its old standalone Mobile-Friendly Test tool, so this is the closest real equivalent still available.

Is this the same as Google's old Mobile-Friendly Test?

Not exactly — Google shut that standalone tool down. This uses the mobile-usability-relevant audits from the PageSpeed Insights API's Lighthouse report instead, which checks the same underlying signals (viewport, tap targets, font size, content width) using the same Lighthouse engine.

Why does it sometimes ask for an API key?

Google allows a limited number of free requests per day without a key. If that quota is exhausted, you'll be rate-limited (HTTP 429) — adding a free key from Google Cloud Console removes that shared limit.

Does the URL I enter pass through this site's servers?

No. The request goes directly from your browser to Google's `googleapis.com` endpoint — this site never sees the URL you test or the results.