Dead Pixel Test
Cycle fullscreen solid colors (red, green, blue, white, black and more) to find dead or stuck pixels on any monitor or phone.
Click “Start test” to go fullscreen, then click / press any key (or →) to cycle through solid colors. Inspect the screen for pixels that stay dark (dead) or show the wrong color (stuck). Press Esc to exit.
Tips: clean the screen first (dust looks like dead pixels); a stuck pixel shows one color on every background, a dead pixel stays black on white. Stuck pixels can sometimes be revived by gently massaging the spot or using rapid color cycling.
Privacy & Security
Runs entirely in your browser. No data is sent to any server.
How to Use
Click Start to go fullscreen, then click or use arrow keys to cycle colors while inspecting the screen. Press Esc to exit.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.