All screen tests

28 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→Dead Pixel Test→Backlight BleedReveal LCD backlight leakage and IPS glow in a dark room.Open test→Backlight Bleed→Brightness UniformityA 50% gray field, a 9-zone grid and a panning gray to spot uneven backlighting.Open test→Brightness Uniformity→Blooming TestA bright object on black to judge local-dimming halos.Open test→Blooming Test→Burn-in TestFull-screen fields and a checkerboard to reveal OLED burn-in.Open test→Burn-in Test→Contrast TestBlack-and-white checkerboards to judge black/white separation.Open test→Contrast Test→Black Level TestNear-black steps to see how dark your panel really goes.Open test→Black Level Test→Viewing Angle TestGrey steps and color bars to reveal off-axis color/brightness shift.Open test→Viewing Angle Test→Touch Screen TestTouch every cell or draw freely to find dead zones and multi-touch limits.Open test→Touch Screen Test→Overscan TestEdge markers, circles and a grid to catch cropping, stretching and distortion.Open test→Overscan Test→Sharpness TestPixel-level lines, checkerboards and text to expose scaling blur and oversharpening.Open test→Sharpness Test→PWM Flicker TestBright fields and a fast-moving line for the pencil and camera flicker tests.Open test→PWM Flicker Test→

Color & Calibration

Color TestDisplay pure black, white, red, green, blue and more, full-screen.Open test→Color Test→Black ScreenA pure black full-screen for backlight, dust, and OLED checks.Open test→Black Screen→White ScreenA pure white full-screen for cleaning, lighting, and uniformity.Open test→White Screen→Greyscale TestSmooth gradient and 32-step ramp to reveal color banding.Open test→Greyscale Test→Color GradientSmooth spectrum and RGB gradients to judge color transitions and banding.Open test→Color Gradient→Gamma TestStripe-vs-patch pattern to read your display's gamma.Open test→Gamma Test→Wide Color Gamut TestHidden logos in P3 colors that only a wide-gamut screen can show.Open test→Wide Color Gamut Test→HDR TestA real HDR image with brightness steps up to 1,600 nits, plus HDR detection.Open test→HDR Test→

Motion & Timing

Refresh RateMeasure your real refresh rate and watch a moving reference.Open test→Refresh Rate→Ghosting TestMoving boxes at selectable speeds to reveal ghosting and trails.Open test→Ghosting Test→Screen Tearing TestFast scrolling bars that reveal tearing without V-Sync/VRR.Open test→Screen Tearing Test→Frame Skipping TestOne cell per frame — photograph it to catch a screen that drops frames.Open test→Frame Skipping Test→

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→Fake Broken Screen→ScreensaverMatrix rain, starfield, snow, pipes, clock, and the classic DVD logo, full-screen.Open test→Screensaver→Boot Screen SimulatorFull-screen Windows 10, Windows XP, and macOS startup screens.Open test→Boot Screen Simulator→Screen InfoSee your screen resolution, scaling, refresh rate, color gamut and HDR support.Open test→Screen Info→