Responsive Design Tester
Test how your website looks on different devices and screen sizes. Preview on phones, tablets, laptops, and desktops — completely free online.
Enter a URL above to preview your website
Frequently Asked Questions
A Responsive Design Tester lets you preview how a website looks on different screen sizes and devices. You can test on popular phones, tablets, laptops, and desktops without owning every device.
You can test on iPhone SE (375x667), iPhone 14 (390x844), iPad (768x1024), iPad Pro (1024x1366), Laptop (1366x768), and Desktop (1920x1080). You can also enter custom dimensions for any screen size.
Yes, the tool simply loads your website in an iframe at the selected viewport size. No data is stored or transmitted. Everything happens in your browser.
Yes, completely free with no registration. Test as many websites and screen sizes as you need with no limits.