Адаптивний переглядач показує поточну сторінку у кількох розмірах viewport поруч.
Testing responsive designs traditionally means resizing the browser window or using DevTools' device toolbar to switch between viewport sizes one at a time. This works, but you can only see one size at a time — making it impossible to compare how a section looks on mobile vs desktop simultaneously. Responsive Viewer solves this by rendering the page in multiple viewports at once, displayed side by side on your screen. Select from preset device profiles (iPhone 15, iPad Pro, Pixel 8, MacBook, 1440p Desktop) or enter custom dimensions. Each viewport is a fully rendered instance of the page, not a static screenshot — scroll one and all others scroll to the same position. This synchronized scrolling lets you compare the exact same content area across all device sizes at a glance. It's the fastest way to spot responsive issues: navigation that wraps incorrectly, images that overflow their containers, text that becomes unreadable on small screens, or spacing that collapses awkwardly.
See the current page rendered simultaneously in multiple viewport sizes displayed side by side on your screen. Compare mobile, tablet, and desktop layouts at a glance without switching between views. Each viewport is a fully functional render of the page.
Choose from a library of popular device presets: iPhone 15 (393×852), iPhone SE (375×667), iPad (820×1180), iPad Pro (1024×1366), Pixel 8 (412×915), MacBook Pro (1440×900), and Full HD Desktop (1920×1080). Presets are updated with current device dimensions.
Enter any custom width and height to test non-standard viewport sizes. Need to check how the page looks at exactly 768px wide (the common tablet breakpoint)? Just type it in. Multiple custom viewports can be added alongside presets.
Scroll one viewport and all others scroll to the same vertical position. This lets you compare the exact same content section across all device sizes simultaneously — see how the hero area, pricing table, or footer renders across mobile, tablet, and desktop.
Each viewport is displayed inside a realistic device frame — phone bezels, tablet borders, laptop chrome. The visual context helps stakeholders understand which viewport represents which device during reviews and presentations.
Toggle individual devices on and off to focus on specific size comparisons. Comparing just mobile and desktop? Deselect the tablet presets. Need to see only iPhones? Deselect everything else. Full control over which viewports are visible.
After implementing a responsive design, use Responsive Viewer to verify that every section looks correct across all target device sizes. Catch text overflow, image scaling issues, navigation collapse problems, and spacing inconsistencies — all in one view.
Show clients how their website looks across devices during a review meeting. The side-by-side view is immediately intuitive — no need to explain viewport concepts. Clients can see mobile, tablet, and desktop simultaneously.
Seeing a layout break at a specific width? Add a custom viewport at the exact pixel width where the issue occurs and compare it against slightly wider and narrower viewports to identify which CSS breakpoint is causing the problem.
Check if long headings wrap correctly on mobile, if data tables become scrollable on small screens, if form inputs are large enough to tap, and if CTAs remain visible and accessible across all device sizes.
Use the multi-device view to create compelling responsive design showcase images. Take a screenshot of the Responsive Viewer showing your design across 3-4 device sizes for portfolio presentations.
Open the DevSuite Pro floating dock and click the Responsive Viewer icon. The page transitions into multi-viewport mode with device frames displayed side by side.
The device bar at the top shows available presets (iPhone, iPad, Pixel, MacBook, Desktop). Click devices to toggle them on/off. Selected devices appear as viewports below.
Click the "Custom" button and enter specific width × height dimensions to add a custom viewport. Useful for testing exact breakpoint values like 768px, 1024px, or 1280px.
Scroll any viewport — all others follow to the same position. Compare how the same section looks across all selected device sizes simultaneously.
Click the Responsive Viewer icon again or the close button to exit multi-viewport mode and return to the normal single-page view.
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