InjuredPixels - Easily check your PC, laptop, tablet, smartphone, connected screen or TV for dead pixels, scratches...

Dead Pixel Buddy - web app tool to detect dead pixels on lcds plasmas tvs

Black-Screen.cc - Free Black Screen for fullscreen focus, OLED power saving, and display testing. Use black, white, red, green, and more for pixel checks and downloads.

ScreenTest.run - The easiest way to check your monitor for dead pixels. Fullscreen, dark mode, no ads. Works on PC, Mac, and Mobile.

Screentest - Program for testing the quality of CRT/LCD screens. It displays various patterns and allows you to estimate the quality of your CRT/LCD monitor.

EIZO Monitor Test - The EIZO monitor test lets you quickly and easily assess your monitor’s image quality. You can carry out 13 individual tests to check how uniform the image display is across the entire monitor, for example, or if the text is displayed sharply.