Screen Test
Find dead or stuck pixels, backlight bleed and color banding in full screen, measure the refresh rate and see the motion blur of your display
Your screen
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Refresh rate, measured
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Resolution
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Pixel ratio
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Colors
The refresh rate is how often the browser draws, measured over a second: a battery saver, or Safari on a 120 Hz screen, may hold it at 60. The resolution is the screen in CSS pixels times the pixel ratio: with a scaled display mode, the size the system draws at, not always the panel's.
Tests
- Click, → or Space
- Next screen
- ←
- Previous screen
- Esc
- Quit
Each test opens in full screen and ends after its last screen. Clean the screen first: a speck of dust looks like a dead pixel, but it moves when you wipe it.