Dead Pixel Checker

Dead Pixel Checker Overview

Cycle through solid colors to find stuck or dead pixels on your screen.

Dead Pixel Checker is a comprehensive screen diagnostic tool that helps you identify dead, stuck, or hot pixels on your monitor, laptop, smartphone, or tablet display by cycling through solid colors in fullscreen mode. Dead pixels are individual pixels that remain permanently black (completely non-functional), while stuck pixels stay lit in a single color (red, green, or blue) regardless of what the screen displays. This checker uses pure black, white, red, green, and blue backgrounds to make any pixel defects immediately visible against the uniform color field. Detecting dead or stuck pixels is crucial when purchasing new displays, validating warranty claims, troubleshooting display issues, or assessing screen quality for professional work. The tool works by entering fullscreen mode and allowing you to cycle through different solid colors by clicking or tapping anywhere on the screen, making it easy to systematically check every area of your display. Modern displays contain millions of pixels, and even a single dead pixel can be distracting, especially for designers, photographers, video editors, and gamers who demand perfect image quality. This dead pixel test is invaluable for consumers testing new monitors before the return period expires, professionals ensuring display quality for color-critical work, and anyone experiencing visual anomalies on their screen.

How to Use Dead Pixel Checker

Frequently Asked Questions

What is the difference between a dead pixel and a stuck pixel?
A dead pixel is completely black and non-functional, receiving no power. A stuck pixel is lit in a single color (red, green, or blue) and stuck in the "on" position. Stuck pixels can sometimes be fixed, while dead pixels are usually permanent hardware failures.
Can stuck pixels be fixed?
Sometimes yes! Try gently massaging the affected area with a soft cloth while the pixel is displaying different colors, or use pixel-fixing software that rapidly cycles colors. Success rates vary, but many users report fixing stuck pixels with these methods.
How many dead pixels are acceptable?
Most manufacturers allow 3-5 dead pixels before considering a display defective under warranty, depending on the pixel class and location. However, for professional or premium displays, even one dead pixel may qualify for replacement. Check your specific warranty terms.
Why should I test in fullscreen mode?
Fullscreen mode eliminates all UI elements, borders, and distractions, providing a pure solid color across the entire display. This makes even tiny pixel defects immediately visible and ensures you can test every corner and edge of your screen.
What colors should I test with?
Test with pure black (reveals stuck bright pixels), pure white (reveals dead dark pixels), and primary colors red, green, and blue (reveals stuck pixels in other colors). This combination ensures you can detect any type of pixel defect.

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