Dead Pixel & Screen Quality Diagnostic Tester

Click any color below to inspect your monitor. Use Left/Right Arrow keys or click to cycle colors. Press Escape to return.

Primary Test PatternsClick swatch to inspect in fullscreen

Pitch Black

#000000

Pure White

#FFFFFF

Pure Red (R)

#FF0000

Pure Green (G)

#00FF00

Pure Blue (B)

#0000FF

Cyan (C)

#00FFFF

Magenta (M)

#FF00FF

Yellow (Y)

#FFFF00

50% Neutral Grey

#808080

Auto Cycle Slideshow

Cycles through every solid color pattern automatically at your chosen speed.

Stuck Pixel Exerciser (Rapid Strobe)

Rapidly alternates primary colors to stimulate stuck LCD sub-pixels.