Website Responsive Testing Tool
Preview any website across Mobile, Tablet & Desktop device sizes.
How to Test Website Responsiveness
Check how your website looks on mobile, tablet, and desktop in three easy steps.
Enter Website URL
Paste your website link into the input box and click the Test URL button to load the preview.
Select Device View
Switch between Desktop, Tablet, Mobile, or Custom screen sizes to see how your site adapts.
Preview & Analyze
Instantly preview your website layout and test responsiveness across different screen sizes.
Frequently Asked Questions
Is this website responsive testing tool free to use?
Yes, the Website Responsive Testing Tool is 100% free. You can preview your website on mobile, tablet, and desktop screens without any signup or payment.
Do you store or track the websites I test?
No. We respect your privacy. The tool runs directly in your browser, and we do not store or track the URLs you test.
Why is my website not loading in the preview?
Some websites block iframe embedding for security reasons. If your site does not load, it likely prevents being displayed inside other websites.
Can I test custom screen sizes?
Yes. You can use the Custom option to enter your own width and height to preview how your website looks on any screen size.
Is this the same as real device testing?
This tool simulates different screen sizes and viewports. While it’s great for layout testing, real device testing may still be needed for final QA.