Responsive Viewport Design Tester
Verify viewport compatibility, test layout responsiveness, and check scaling issues.
Test Mobile-Friendly Page Layouts
Mobile responsiveness is a critical ranking factor. This mobile viewport tester displays interactive website previews in iPhone, iPad, and desktop viewports, helping you spot layout issues.
Key Benefits & Features
iPhone/iPad Presets
Simulates mobile device screen sizes.
Interactive Frames
Test layouts with mobile-specific designs.
Usability Audit
Identify horizontal overflow or tiny font sizes.
How to Use the Mobile Viewport Tester Step-by-Step
This utility runs entirely inside your browser using client-side JavaScript. We prioritize your security: none of your inputted text is logged or stored.
- 1
Enter the target website address URL.
- 2
Toggle device viewports to inspect styling grids.
- 3
Verify touch elements scaling on mobile viewports.
Practical Examples
Mobile mode
Frequently Asked Questions (FAQ)
What is mobile-first indexation?▼
Google crawls and evaluates websites using mobile user-agents first. A poor mobile layout will hurt desktop search performance.
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