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This essential web developer and SEO tool lets you test how your website appears across different devices and screen sizes. According to Google's Mobile-First Indexing guidelines, responsive design is now critical for search rankings and user experience.
✅ Mobile-Friendly Testing - Check compliance with Google's Mobile Usability Standards
✅ Cross-Device Preview - See how your site renders on phones, tablets, and desktops
✅ SEO Optimization - Identify layout issues affecting Core Web Vitals
✅ Design Validation - Ensure proper display on all viewports
✅ Instant Results - No downloads or installations required
✔ 100+ Device Presets - iPhone, Android, iPad, and desktop resolutions
✔ Custom Resolution Input - Test any screen size (1920×1080, 1366×768, etc.)
✔ Orientation Switching - Portrait vs. landscape mode testing
✔ Pixel-Perfect Inspection - Zoom to check image quality and text readability
Web Designers creating responsive layouts
SEO Specialists optimizing for mobile-first indexing
Developers debugging CSS media queries
Content Creators ensuring readability across devices
E-commerce Managers testing product page displays
Enter your website URL
Select a device preset or enter custom dimensions
View real-time rendering with interactive controls
Capture screenshots for client reports
Search Engine Land confirms that:
60% of searches now come from mobile devices
Poor mobile experience increases bounce rates
Google penalizes non-responsive sites in rankings
✔ Test multiple breakpoints (320px, 768px, 1024px+)
✔ Check Google's PageSpeed Insights after adjustments
✔ Verify touch targets meet WCAG 2.1 standards
✔ Compare rendering across Chrome, Safari and Firefox
Optimize your website for every device – no coding skills required!