Screen Resolution Simulator

Responsive design is no longer optional — with mobile traffic accounting for over 55% of global web visits, your site must look and function flawlessly across phones, tablets, laptops, and ultrawide monitors. Our free Screen Resolution Simulator lets you instantly preview any URL across 14 device viewports — from the compact iPhone SE (375×667) to expansive ultrawide monitors (3440×1440). See exactly how your layout adapts, how text reflows, and where media queries kick in. Rotate between portrait and landscape, zoom in for pixel-level inspection, and jump between devices with a single click. The sandboxed iframe loads the live page so you're testing the real thing, not a static mockup.

How to Use

1. Enter a URL — Type any publicly accessible URL. HTTPS is added automatically if no protocol is specified.
2. Select a device — Choose from iPhone, Pixel, Galaxy, iPad, MacBook, or desktop monitor presets. The viewport updates instantly.
3. Rotate orientation — Toggle between portrait and landscape to test both orientations on mobile devices.
4. Zoom for detail — Use the zoom slider or quick presets (50%, 75%, 100%) to inspect layouts at different scales.

Key Features

• 14 Device Presets

  iPhone 16/SE, Pixel 8, Galaxy S24, iPad Mini/Air/Pro, MacBook, desktop monitors up to 4K+ ultrawide.

• Portrait & Landscape

  One-click rotation to test both orientations. Dimensions swap and the iframe updates instantly.

• Zoom Controls

  Slider from 25%–100% with quick-preset buttons. Inspect at pixel level or zoom out for overview.

• Device Frame

  Visual viewport border with mock title bar (traffic light dots + resolution label) for realistic preview context.

• Live Page Loading

  Loads the actual live URL in a sandboxed iframe — test real pages, not static mockups.

• Open in New Tab

  Quick link to open the tested URL in a full browser tab for comparison with the simulated viewport.