Online Tool Base
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Know Your Screen with Viewport Info

Responsive design requires knowledge. The Viewport Info tool on Online Tool Base instantly identifies your current screen resolution, helping you debug media queries.

Responsive Debugging

onlinetoolbase.online shows you:

  • Inner Width/Height: The actual usable browser area.
  • Screen Size: The physical device resolution.
  • Pixel Ratio: Detect Retina/High-DPI displays.

How to Use

  1. Open the page on any device.
  2. Resize your browser window.
  3. Watch values update in real-time.

Perfect your responsiveness with Viewport Info at Online Tool Base.