Dead Pixel Tester
No need to download some shady app just to test your screens pixels. Free, open, portable, fast, universally available! Bring out your dead … pixels.
It’s got all the good colors! There is RED, GREEN, and BLUE! And for the adventurous mind plenty of CYAN, MAGENTA, and YELLOW is available. Should you like a more conservative approach we got you covered with glamorous white  and abysmal black .
Brightness adjustment 10% — 100%. Optional color to black pattern of checker, horizontal stripes, and vertical stripes. Pattern can be zoomed to 1:1, Retina, 2X, 4X, 8X, 16X.
Simple toggle to run in fullscreen and fading menu on inactivity to proof every last pixel. Every function is available by hotkeys.
 may not contain any actual white.
 doubles as a practical but rather dull screen saver.