Responsive Design Tester: Preview Sites at iPhone, iPad, Desktop Sizes

Test any URL at different screen sizes. 8 device presets from iPhone SE to 4K. Custom dimensions. Live iframe preview.

Responsive Tester

Presets: iPhone SE (375x667), iPhone 14 (390x844), iPhone 15 Pro Max (430x932), iPad Mini (768x1024), iPad Pro (1024x1366), Laptop (1366x768), Desktop (1920x1080), 4K (3840x2160).

Full toolkit: devtools-site-delta.vercel.app