All screen tests
20 free, browser-based tools. Pick a category below.
Panel & Backlight
Dead Pixel TestFull-screen solid colors to find dead, stuck, and bright pixels.Open test→Backlight BleedReveal LCD backlight leakage and IPS glow in a dark room.Open test→Brightness Uniformity50% gray field and a 9-zone grid to spot uneven backlighting.Open test→Blooming TestA bright object on black to judge local-dimming halos.Open test→Burn-in TestFull-screen fields and a checkerboard to reveal OLED burn-in.Open test→Contrast TestBlack-and-white checkerboards to judge black/white separation.Open test→Black Level TestNear-black steps to see how dark your panel really goes.Open test→Viewing Angle TestGrey steps and color bars to reveal off-axis color/brightness shift.Open test→
Color & Calibration
Color TestDisplay pure black, white, red, green, blue and more, full-screen.Open test→Black ScreenA pure black full-screen for backlight, dust, and OLED checks.Open test→White ScreenA pure white full-screen for cleaning, lighting, and uniformity.Open test→Greyscale Test256-step ramp and smooth gradient to reveal color banding.Open test→Color GradientSmooth RGB gradients to judge color transitions and gamut.Open test→Gamma TestStripe-vs-patch pattern to read your display's gamma.Open test→
Motion & Timing
Fun & Utilities
Fake Broken ScreenCracked, glitch, TV static, no signal, dead pixels, glitching pixels, Windows BSOD, Mac, Linux, iOS and Android crash screens to prank friends.Open test→ScreensaverMatrix rain, starfield, snow, pipes, clock, and the classic DVD logo, full-screen.Open test→Boot Screen SimulatorFull-screen Windows 10, Windows XP, and macOS startup screens.Open test→