What is my Window Size?

Discover your browser window size in real time. This tool is ideal for developers testing responsive designs or users needing precise window dimensions.

Detecting...

Your browser window dimensions

Width

-

pixels
Height

-

pixels
Window Information

-

Aspect Ratio

-

Total Pixels

-

Viewport Size

-

Orientation
Responsive Breakpoints
XS < 576px
SM ≥ 576px
MD ≥ 768px
LG ≥ 992px
XL ≥ 1200px
XXL ≥ 1400px
Real-time Detection

Instantly detect your current browser window size with live updates as you resize.

Responsive Testing

Perfect for testing responsive designs and identifying Bootstrap breakpoints.

Easy Sharing

Copy or share your window dimensions for development and testing purposes.

Perfect For
  • Responsive web design testing
  • Bootstrap breakpoint validation
  • CSS media query testing
  • Cross-browser compatibility
  • Mobile-first development
  • UI/UX testing
  • Design validation
  • Quality assurance
How It Works

This tool monitors your browser window in real-time:

  • Detects actual browser window size (not screen resolution)
  • Updates automatically when you resize the window
  • Shows responsive breakpoints for Bootstrap framework
  • Provides accurate dimensions for development work
Bootstrap Breakpoints
  • XS: < 576px (Extra small devices)
  • SM: ≥ 576px (Small devices)
  • MD: ≥ 768px (Medium devices)
  • LG: ≥ 992px (Large devices)
  • XL: ≥ 1200px (Extra large devices)
  • XXL: ≥ 1400px (Extra extra large devices)
Window Size vs Screen Resolution
Window Size

The size of your browser window, which can be resized and is typically smaller than your screen resolution.

Screen Resolution

The total number of pixels on your physical display, which remains constant regardless of browser window size.