Sense — Multi-Screen Preview

Preview any website across mobile, tablet, laptop, and desktop sizes side by side, in one click.

Sense lets you preview any website across Mobile, Tablet, Laptop, and Desktop screen sizes side by side, in a single tab — no more manually resizing your browser window or fighting with DevTools' device toolbar. Click the toolbar icon (or press Ctrl+Shift+Y) on any site to open a four-device grid. Each card renders the page at a real device width, so responsive breakpoints trigger exactly as they would for an actual visitor. Swap in specific devices per category (iPhone SE, Pixel 7, iPad Pro, MacBook Air, and more), flip a card between portrait and landscape, and save a screenshot — just one card, or all four combined into a single image. Key features: • Four device categories previewed simultaneously, each with a dropdown of real device sizes • Portrait/landscape toggle per card, with a clear on-screen indicator of which one you're in • One-click screenshot export — a single device, or all four combined into one image • Toggle which categories are shown, to focus on just Mobile + Tablet, for example • Light and dark mode, following your system by default or set manually • Remembers your last URL, device choices, category visibility, and theme between sessions • Recent-URLs dropdown for quickly re-previewing sites you've checked before • Fully customizable device list via the Options page • A short guided tour for first-time users, reopenable anytime from the toolbar Sense only touches the preview frames inside its own tab. It doesn't collect analytics, doesn't track your browsing, and doesn't send any data anywhere — everything it remembers is stored locally in your browser.