Tool description

The Screen Size Detector is a real-time display measurement tool that provides instant information about both viewport dimensions and physical screen resolution. This tool automatically detects and displays the current browser viewport size (the visible area of the web page) as well as the total screen dimensions of the user's device. The detector updates dynamically when the browser window is resized, making it invaluable for responsive web design, testing, and understanding how content appears across different screen sizes and device configurations.

Features

  • Real-time Detection: Automatically detects and displays current viewport and screen dimensions
  • Dynamic Updates: Instantly updates measurements when browser window is resized or device orientation changes
  • Dual Measurement Display: Shows both viewport dimensions (browser window) and total screen resolution
  • Pixel-perfect Accuracy: Provides exact pixel measurements for precise design and development work
  • Copy-to-Clipboard Values: All dimension values can be easily copied for documentation or development use
  • Responsive Monitoring: Perfect for testing responsive breakpoints and media queries
  • Cross-device Compatibility: Works across desktop, tablet, and mobile devices for comprehensive testing
  • Clean Output Format: Clear separation between viewport and screen measurements with pixel units
  • No Configuration Required: Works immediately without any setup or input from users

Use cases

  • Responsive Web Design: Test and verify how websites appear at different viewport sizes and breakpoints
  • CSS Media Query Development: Determine exact pixel values for creating responsive CSS media queries
  • Mobile Development: Understand device screen dimensions for mobile-first design and optimization
  • Cross-browser Testing: Verify consistent behavior across different browsers and screen resolutions
  • User Experience Research: Analyze how content adapts to different screen sizes and device types
  • Design System Development: Establish design guidelines based on common viewport and screen dimensions
  • Quality Assurance: Test website layouts across various screen sizes for consistency and usability
  • Client Presentation: Demonstrate responsive design capabilities and screen size considerations to clients
  • Development Documentation: Record screen size requirements and responsive behavior for technical specifications