Screen Test Online

✓ Prueba de pantalla en línea y gratuita

Check any display for dead pixels, backlight bleed, color banding and geometry — full screen, free, nothing to install.

Eight solid color screensBlack, white, red, green, blue, cyan, magenta and yellow reveal dead or stuck pixels, dust, smudges and backlight bleed.
Gradient and banding checkA black-to-white ramp plus RGB ramps show whether your panel renders smooth gradients or breaks them into visible bands.
Shadow and highlight detailA 32-step grayscale plus fine 0–15 and 240–255 steps expose crushed blacks and blown highlights from bad contrast or gamma.
Color cast and saturationA hue wheel and a color chart with a neutral gray reference row make even a slight white balance shift easy to spot.