Responsive Viewer — Mobile & Tablet Simulator

Test and preview responsive websites on 77+ mobile phones, tablets, foldables, and desktop viewports in real-time.

Multiscreen Simulator is a comprehensive responsive testing suite built for web developers, designers, and QA testers. Preview and test your web applications on 77+ realistic device frames with accurate CSS viewports, Device Pixel Ratios (DPR), and orientation switching. 🚀 KEY FEATURES: • 77+ Real Device Frames: Test on iPhone 18 Pro, Google Pixel 10, Galaxy S26 Ultra, foldables, tablets, and laptops. • Accurate CSS Viewports: Real dimensions, DPR scaling, and orientation rotation (portrait / landscape). • High-Resolution Transparent Mockups: Export device frames with transparent backgrounds ready for presentations and Figma. • 1-Click Code Generation: Copy exact CSS media queries and device User-Agent strings. • Local File Testing: Seamlessly test local projects (file:/// URLs) and localhost dev servers. • Full Privacy: All testing runs 100% locally inside your browser sandbox. No account registration or subscriptions required. 🔧 HOW TO USE: 1. Click the extension icon on any open tab. 2. Select your target device from the catalog bar. 3. Toggle orientation, test interactive touch events, or capture full-page screenshots.