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FreeToolBox

Screen Resolution Tester

Check your current screen resolution, viewport size, DPI and device pixel ratio. Test responsive breakpoints. Free screen info tool.

Screen Resolution
Viewport Size
Device Pixel Ratio
Color Depth
Available Size:
Orientation:
Touch:
CSS Breakpoint:

Responsive Breakpoint Tester

Tailwind CSS Breakpoints

sm (640px+)
md (768px+)
lg (1024px+)
xl (1280px+)
2xl (1536px+)
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Free Screen Resolution Tester

Instantly check your screen resolution, viewport size, device pixel ratio and color depth. See which CSS breakpoints are active and test responsive design.

What's Measured

  • Screen Resolution - Your monitor's native pixel dimensions
  • Viewport Size - The actual browser content area (changes when you resize)
  • Device Pixel Ratio - How many physical pixels per CSS pixel (2x on Retina)
  • CSS Breakpoints - Which Tailwind/Bootstrap breakpoints are active