Monitor Dead Pixel & Stuck Pixel Tester
The problem: Spotting tiny defective or stuck sub-pixels on high-resolution computer monitors requires clean, distraction-free solid color fields.
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Monitor Dead Pixel & Stuck Pixel Tester: the complete guide
A Monitor Dead Pixel and Stuck Sub-Pixel Tester provides fullscreen solid primary and secondary color backgrounds to inspect computer monitors, laptop panels, tablets, and OLED screens for display defects. Manufacturing anomalies such as stuck transistors (permanently illuminated sub-pixels) or dead pixels (unpowered dark dots) are best spotted against pure black, white, red, green, blue, cyan, magenta, and yellow color fields. This utility runs entirely in your browser with zero installation.
Dead Pixels vs. Stuck Pixels: Key Differences
A dead pixel occurs when the thin-film transistor (TFT) powering a pixel fails to pass voltage, leaving it permanently dark against white or bright backgrounds. In contrast, a stuck pixel is frozen in an 'on' state, displaying as a bright green, red, or blue dot even against solid black screens. OLED displays may also exhibit individual sub-pixel burn-out.
Screen Preparation & Inspection Protocol
Before initiating a dead pixel test, clean the monitor screen with a microfiber cloth to remove dust particles that mimic dead pixels. Launch fullscreen mode and cycle systematically through all 8 test colors using arrow keys. Inspect all four screen quadrants, paying special attention to edges and high-contrast transitions.
Step by step: how to use Dead Pixel Tester
- 1
Clean your physical monitor screen thoroughly with an approved microfiber cloth.
- 2
Click 'Launch Fullscreen Test' to enter an uninterrupted full-display view.
- 3
Use the Spacebar, Right Arrow, or click the screen to cycle through solid test colors.
- 4
Inspect the display closely against Pure Black for bright stuck sub-pixels.
- 5
Inspect the display against Pure White for dark dead pixels and backlight bleed.
- 6
Press the ESC key at any time to exit fullscreen mode.
Security & privacy
Native HTML5 Fullscreen API only. No external plugins, browser extensions, or screen recording scripts are executed. Your screen resolution and hardware IDs remain completely private.