🟥 Dead Pixel Test
Check your monitor, laptop, or phone screen for dead and stuck pixels. Tap a color to fill the whole screen — black, white, red, green, blue and gray — and look closely for dots that stay the wrong color. Cycle through colors in fullscreen; a dead pixel stays black, a stuck pixel stays one color.
Fill the screen with a solid color and look for dots that don't match. Best in a dark room.
Tap/click to go to the next color, Esc to exit.
🔒 Runs 100% in your browser. Your data never leaves your device.
How to use
- Tap a color or press Start to go fullscreen.
- Click or press → to cycle colors, ← to go back.
- Look closely for pixels that stay black or a wrong color.
- Press Esc to exit fullscreen.
FAQ
Dead pixel vs stuck pixel?
A dead pixel stays black on every color because it gets no power. A stuck pixel stays one color (often red, green or blue). Stuck pixels sometimes recover; dead pixels usually don't.
How do I find them?
View each solid color fullscreen in a dark room and look for dots that don't match. Black finds stuck-on pixels; white finds dead (always-off) pixels.
Can this fix a stuck pixel?
This tool helps you find them. Some stuck pixels recover with rapid color flashing or gentle pressure, but there is no guarantee.