MultiView - Device Responsive Simulator

About

MultiView is the ultimate responsive design testing tool built for web developers, UI/UX designers, and QA engineers. Instead of manually resizing your browser or switching between physical devices, MultiView lets you preview any website across multiple device frames simultaneously — all in one place, all live and interactive.

🖥️ See Every Screen Size at Once
Load any URL and instantly see how it looks on an iPhone, iPad, Android phone, MacBook, desktop monitor, and more — all side by side on a single zoomable canvas. No more guessing. No more switching tabs. Just enter a URL and get a complete picture of your responsive layout in seconds.

📱 Real Device Previews
MultiView includes a full library of real device presets covering the most popular phones, tablets, laptops, and desktop monitors including:

iPhone 16 Pro Max, iPhone 16 Pro, iPhone 16, iPhone SE, iPhone 13 mini
iPad Pro 13" M4, iPad Pro 11" M4, iPad mini
Samsung Galaxy S24 Ultra, Galaxy Tab S9 Ultra, Galaxy Z Fold 6
Pixel 9 Pro XL, Pixel 9 Pro, Pixel Tablet
MacBook Pro 14", MacBook Pro 16", iMac 24"
Apple Watch Ultra 2, Galaxy Watch 7, Pixel Watch 3
Full HD 1080p, 4K UHD, and more

Each device frame uses accurate screen dimensions and pixel density so you get a true representation of how your design will look on real hardware.

⚡ Powerful Features Built for Developers
Sync Scrolling — Scroll one device frame and all other frames scroll with it automatically. Test your sticky headers, parallax effects, and scroll animations across every breakpoint at the same time.
Sync Clicks — Click or type in one frame and the interaction is mirrored across all other frames simultaneously. Perfect for testing form behaviour and navigation across multiple viewports at once.
Mobile User Agent Emulation — MultiView spoofs the browser user agent for each device frame so websites serve the correct mobile or tablet version of their site, exactly as real users would experience it.
Touch Emulation — Simulate real touch events inside mobile and tablet frames. Test tap targets, swipe gestures, and touch interactions without needing a physical device.
Custom Viewports — Not seeing your exact device in the library? Add any custom width and height as a viewport and preview your design at any resolution you need.
Force Dark Mode — Instantly apply dark mode across all frames to test your dark theme implementation across every device size simultaneously.
Zoom and Pan Canvas — The Figma-style infinite canvas lets you zoom in and out and pan across all your device frames freely. Use keyboard shortcuts, the scroll wheel, or the built-in zoom controls to navigate your workspace.
Zoom to Fit — One click to automatically fit all your open device frames perfectly within your viewport. Never lose track of your frames again.
Refresh All — Reload every device frame simultaneously with a single click. Essential for testing after code changes.
Collapsible Sidebar — A clean floating sidebar lets you browse and add devices quickly without cluttering your workspace. Search for any device by name and add it to your canvas instantly.
Flexible Dock — Position the control dock at the top, bottom, left, or right of your screen to suit your workflow.
Light and Dark Theme — MultiView itself supports both light and dark themes so you can work comfortably in any environment.
Keyboard Shortcuts — Power users can control everything from the keyboard. Switch tools, zoom, refresh, and navigate without touching the mouse.

🎯 Who Is MultiView For?
Web Developers — Catch responsive bugs before they reach production. Test your CSS breakpoints, flexible layouts, and media queries across real device dimensions instantly.
UI/UX Designers — Present your designs to clients showing exactly how they look on every device. No more exporting screenshots or setting up a device farm.
QA Engineers — Run visual regression checks across multiple viewports simultaneously. Find layout issues faster and with more confidence.
Freelancers and Agencies — Deliver pixel-perfect responsive websites to clients by testing thoroughly across all the devices your clients and their users actually use.

🔒 Privacy First
MultiView does not collect, store, or transmit any personal data. No analytics. No tracking. No accounts required. Everything runs locally in your browser. The extension only modifies response headers on sub-frame requests within its own dashboard to enable website previewing — your browsing data stays completely private.

🚀 Getting Started

Install MultiView from the Chrome Web Store
Click the MultiView icon in your toolbar on any webpage
The page you were viewing opens instantly in the MultiView dashboard
Add device frames from the sidebar and start previewing
Enter any URL in the navigation bar to load a different site

That is all it takes. No setup. No configuration. No account. Just install and start building better responsive websites.

MultiView is developed and maintained by the team at Pyzit. We are committed to building fast, reliable, and privacy-respecting developer tools. If you have feedback, feature requests, or run into any issues, visit us at pyzit.com.