Mobile-Friendly Test

Why Mobile-Friendliness Matters for SEO

Since 2019, Google has used mobile-first indexing for all websites. This means Google primarily uses the mobile version of your site for ranking and indexing. If your site does not work well on mobile devices, it will struggle to rank regardless of how good your desktop experience is. Over 60% of all Google searches now come from mobile devices, making mobile optimization non-negotiable.

A poor mobile experience also increases bounce rates. Google reports that 53% of mobile users abandon sites that take longer than 3 seconds to load. Each second of delay reduces conversions by approximately 7%. This tool helps you identify exactly what is holding back your mobile performance.

Understanding Your Lighthouse Scores

This tool runs a real Google Lighthouse audit via the PageSpeed Insights API, the same engine Chrome DevTools uses. You receive four scores:

• Performance (0-100) measures loading speed, interactivity, and visual stability. It includes metrics like First Contentful Paint, Largest Contentful Paint, Total Blocking Time, Cumulative Layout Shift, and Speed Index.
• Accessibility (0-100) evaluates how usable your site is for people with disabilities, including color contrast, ARIA labels, heading structure, and keyboard navigation.
• Best Practices (0-100) checks for modern web development standards like HTTPS, image aspect ratios, console errors, and deprecated APIs.
• SEO (0-100) verifies basic search engine optimization requirements such as meta tags, crawlable links, valid robots.txt, and structured data.

Scores are color-coded: green (90-100) is good, orange (50-89) needs improvement, and red (0-49) is poor. Aim for all four categories above 90 for optimal mobile search performance.

Key Mobile Usability Factors

Beyond Lighthouse scores, mobile-friendliness depends on five core usability checks:

• Viewport meta tag -- ensures your page scales correctly on mobile screens. Without it, mobile browsers render the page at desktop width, making text unreadable.
• Font sizes -- text must be at least 12px on mobile to be legible without zooming. Small fonts force users to pinch-to-zoom, which Google considers a poor mobile experience.
• Tap targets -- buttons and links need adequate size (at least 48x48 CSS pixels) and spacing so users can tap them accurately with their fingers.
• Content width -- all content must fit within the viewport without horizontal scrolling. Elements wider than the screen create a frustrating experience.
• Plugin usage -- plugins like Flash are not supported on most mobile browsers and signal an outdated, non-mobile-friendly site.

Use this tool alongside our Local Rank Checker to see how mobile issues impact your local search rankings, and our Schema Generator to add structured data that improves your SEO score.