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Test if your website is mobile-friendly. Check viewport, responsive CSS, touch targets, font sizes, and horizontal scroll — get an instant mobile score with actionable fixes. No login required.
Check viewport, touch targets, font sizes, responsive CSS, and more. Get an instant mobile score with actionable recommendations. No login required.
Presence of <meta name="viewport"> and whether it sets width=device-width, initial-scale=1
Whether @media queries appear in the page source — the core responsive-layout signal
Inline widths under 44px on buttons, links, and inputs — a common mobile tap-target mistake
Inline font-size below 16px, the minimum size readable on phones without pinching to zoom
Large fixed pixel widths and overflow-x rules that force sideways scrolling on narrow screens
Which images lack srcset, <picture>, or <source> and so download full-size on mobile data
A mobile-friendly test checks whether your pages work well on phones: content fits the screen, text is readable without zooming, tap targets are large enough, and nothing forces sideways scrolling. SiteRepair scores those signals from 0-100 and lists the specific issues that hold your mobile experience back.
Enter a URL and SiteRepair fetches the page, then analyses the returned HTML and source for mobile signals: the viewport meta tag, @media queries, inline element dimensions, font sizes, overflow rules, and responsive-image attributes. Each failed signal becomes an issue with a concrete fix. The analysis runs on the fetched source, not on a rendered device viewport, so results reflect what the page declares rather than how a specific phone paints it.
Six signals: viewport configuration, responsive CSS (@media queries), touch-target sizing, font readability, horizontal-overflow risk, and responsive images (srcset, <picture>, <source>). Your mobile score starts at 100 and drops per issue by severity — errors weigh more than warnings, which weigh more than informational notes.
The most common causes are a missing or misconfigured viewport meta tag, no @media queries so the layout never adapts, buttons or links narrower than 44px, body text under 16px, fixed pixel widths wider than a phone screen, and images without srcset that download full-size over mobile data. Each reported issue includes the exact fix to apply.
No. SiteRepair analyses your page's fetched HTML and source for mobile signals — it does not render on a physical phone, run browser or device emulation, or perform Lighthouse mobile testing, and it does not validate Google Search Console's mobile-friendly classification. It is a fast source-level check; for rendered-device behaviour and Core Web Vitals, pair it with our performance audit or Google's own tools.
Want the deeper mobile picture? Read our mobile performance guides or run a full performance audit for Core Web Vitals on mobile.
Mobile-friendliness and Core Web Vitals go hand in hand. A performance audit shows exactly which assets are causing your mobile experience to lag.
Try Performance Checker