Check resolution, aspect ratio, and pixel density of any display
This tool has no configuration — open it fullscreen on the display you want to test.
It will show the actual viewport resolution, screen resolution, pixel density, and computed aspect ratio. Values update live on window resize.
Screen Resolution Tester
0 × 0
Viewport (CSS pixels)
0 × 0
Screen resolution
—
Aspect ratio
1x
Pixel density (DPR)
Detects viewport and screen resolution
Shows pixel density and scaling
Computes aspect ratio automatically
Updates live on window resize
Create unlimited screens with templates, themes, and real-time updates.
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