Free online dead pixel test tool. Detect stuck pixels, dead pixels, and hot pixels on your monitor, laptop, or phone screen. Use full-screen color tests in black, white, red, green, blue, and more.
Click anywhere or press spacebar to cycle through colors. Look for dots that don't match the background color.
Press Space or Arrow keys to navigate. Press F for fullscreen.
A free online tool to detect dead, stuck, and hot pixels on any display. Dead pixels appear as black dots on white backgrounds, while stuck pixels show as colored dots on black backgrounds. This tool cycles through solid colors to make defects visible.
A dead pixel is a pixel on your screen that remains unlit (black) regardless of what is being displayed. It occurs when the pixel's transistor fails completely.
A stuck pixel is a pixel that remains a fixed color (usually red, green, or blue) even when the screen changes. Unlike dead pixels, stuck pixels may sometimes be fixed with software tools or gentle pressure.
Some stuck pixels can be fixed using software that rapidly cycles colors, or by gently massaging the area with a soft cloth. However, dead pixels typically cannot be fixed and may require screen replacement if under warranty.
Yes! This dead pixel test works on any device with a web browser — desktop monitors, laptops, tablets, smartphones, and even TVs with a browser.