Responsive Design Tester
// Preview HTML at multiple viewport sizes
Device Presets
×
Zoom:
iPhone 14390×844
#About Responsive Design Tester
Free online responsive design tester. Preview your HTML content at multiple device viewport sizes including iPhone, iPad, laptop, and desktop resolutions. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
What device sizes are included? ▾
Preset sizes include iPhone SE (375x667), iPhone 14 (390x844), iPad (768x1024), iPad Pro (1024x1366), Laptop (1366x768), and Desktop (1920x1080). You can also enter custom dimensions.
Can I test external URLs? ▾
Due to browser security restrictions (X-Frame-Options), most external sites cannot be loaded in iframes. This tool is designed for testing your own HTML content pasted directly into the editor.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/responsive-design-tester" width="100%" height="500" frameborder="0" title="Responsive Design Tester"></iframe>