Responsive Checker

Preview websites at different screen sizes

responsivepreviewmobiletabletviewport

Device Presets

📱 mobile

📲 tablet

🖥️ desktop

Custom Size

375 × 667px
100%
Note: Some websites may block being displayed in iframes due to security policies (X-Frame-Options or CSP). For best results, test your own websites or use sites that allow framing.

Common Breakpoints

About Responsive Checker

Preview websites at different screen sizes This free online tool runs entirely in your browser, ensuring your data stays private and secure. No server uploads, no data collection. Fast, reliable, and available 24/7.

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