Screen Resolution Tester

Display real-time viewport and screen resolution information. Shows current viewport width and height, screen dimensions, aspect ratio, device pixel ratio, screen size category (Mobile, Tablet, Laptop, Desktop, 4K), orientation (Portrait/Landscape), and device information. Browser detection (Chrome, Firefox, Safari, Edge, Opera), operating system detection (Windows, macOS, Linux, Android, iOS), color depth, language, and timezone. Updates automatically on window resize and orientation change. Copy all information with one click. Common screen resolutions reference guide for Desktop (1920×1080, 1366×768), Tablet (768×1024, 1024×768), Mobile (375×667, 414×896), and 4K (3840×2160). Perfect for web developers, designers, and responsive design testing. Real-time monitoring of viewport changes as you resize your browser window.