Pro Display Diagnostics
Free Online Dead Pixel Monitor Tester & Screen Checker
Instantly identify dead pixels, stuck pixels, and backlight bleeding. A professional-grade utility for calibrating and checking display health directly in your browser.
Dead Pixel Detection
Pure RGBW cycles reveal pixels that are permanently black (dead) or permanently bright (stuck).
Backlight Bleeding
Using the pure black test at 100% brightness helps visualize light leaking from the edges of the panel.
Pattern Overlays
Diagnostic grids and gradients help check for color uniformity and subtle panel inconsistencies.