Screen Test is a free online toolkit for testing monitors, laptops, and other displays. It offers Dead Pixel, Refresh Rate, FPS, Backlight Bleed, Screen Size & Resolution, Monitor Color, Color Calibration, Greyscale, HDR, sRGB, Color Accuracy, Color Gamut, Color Depth, and Burn-in tests. No downloads are required. Ideal for gamers, designers, developers, photographers, monitor buyers, and everyday users.