Free Mobile-Friendly Test

How it works

What gets checked

The tool loads your page the way Google's mobile crawler does: throttled connection, simulated mid-range phone. It verifies the viewport meta tag is present and configured correctly, checks whether zoom has been disabled, measures how the page performs on mobile data, and reviews accessibility signals like tap-target size and text contrast.

The viewport tag: the single most common failure

One missing line of code causes more mobile problems than everything else combined. Without <meta name="viewport" content="width=device-width, initial-scale=1"> in the head, a phone renders your desktop layout shrunk down to fit, and visitors have to pinch and zoom to read anything. Most people leave instead. Google also flags the page as not mobile-friendly, which affects ranking directly.

Mobile-first indexing, in plain terms

Google now uses the mobile version of your site to decide how you rank, even for searches made on a desktop. If content is hidden on mobile, or the mobile version loads a stripped-down page, that reduced version is what Google indexes. A common and expensive mistake is hiding text on mobile "to keep it clean": you are hiding it from Google too.

What good mobile actually looks like

Text readable without zooming, at 16px or larger. Tap targets at least 48 by 48 pixels with space between them. A phone user has a fingertip, not a mouse pointer. No horizontal scrolling, ever. Forms that use the correct keyboard type, so a phone number field opens the number pad. And a page that loads in under three seconds on 4G, not on your office fibre connection.