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Responsive Design Tester
New Popular
Test website on different devices
Settings
Enter the URL of the website to test
Preview
1920 × 1080px
Enter a website URL to preview it in different viewport sizes
What is Responsive Design Tester?
Responsive Design Tester is a free online tool that previews how your website looks on different devices and screen sizes. Test responsive design with mobile, tablet, and desktop views.
Features
- Preview websites on different devices
- Multiple device presets (Desktop, Laptop, Tablet, Mobile)
- Custom viewport sizes
- Rotate viewport (portrait/landscape)
- Adjustable scale for better viewing
- Real-time preview
- 100% client-side
Supported Devices
- Desktop (1920×1080)
- Laptop (1366×768)
- Tablet (768×1024, 1024×768)
- Mobile (375×667, 667×375)
- iPhone 12/13 (390×844)
- iPhone SE (375×667)
- iPad (810×1080)
- iPad Pro (1024×1366)
- Custom sizes (320px - 2560px)
Note
Some websites may not load in the preview due to X-Frame-Options or Content Security Policy restrictions that prevent embedding in iframes. This is a security feature implemented by those websites.
Frequently Asked Questions
Is this tool free to use?
Yes, Responsive Design Tester is completely free. No registration required.
Is my data secure?
All processing happens in your browser. Your data never leaves your device.