Responsive Design Checker

Test your website's responsiveness across different devices and screen sizes with our free online design checker.

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5,240+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

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About This Tool

Our Responsive Design Checker allows you to test how your website or web application appears on various devices and screen sizes. Simply enter a URL and select from our comprehensive list of device presets (including popular smartphones, tablets, and desktop resolutions) to see how your design adapts. The tool simulates actual viewport dimensions, provides pixel-perfect previews, and helps identify responsive design issues before deployment. Perfect for web developers, designers, and QA teams who need to ensure cross-device compatibility.

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How to Use

Enter a valid website URL in the input field
Select a device preset from the dropdown menu or enter custom dimensions
Click 'Check Responsiveness' to generate the preview
View the simulated device display in the results section
Use the screenshot button to capture the preview for documentation
Test multiple devices by changing selections and clicking again

Frequently Asked Questions

Find Quick Answers

Does this tool work with password-protected or local websites?

No, the tool can only check publicly accessible websites. Password-protected sites, localhost URLs, and sites with strict CORS policies cannot be tested.

Can I test custom screen sizes not in the preset list?

Yes, you can use the 'Custom' option to enter any width and height dimensions for specialized testing scenarios.

Does the tool affect my website's analytics or performance?

No, the tool only loads your website in an iframe for preview purposes. It doesn't inject tracking code or affect your site's performance metrics.

Can I download the responsive preview results?

Yes, you can use the screenshot feature to capture and download the device preview as a PNG image for documentation or sharing.

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