All screen testing tools
Every test runs free in your browser. Pick one to get started.
Screen tests
Dead Pixel TestFull-screen solid colors to spot dead, stuck or hot pixels on any display.
Colour TestPure primaries and secondaries to judge colour reproduction and spot a tint.
Brightness & GrayscaleA greyscale ramp to check brightness, black level and even backlighting.
Backlight BleedNear-black fields to reveal light leakage, IPS glow and clouding at the edges.
Gradient / BandingSmooth gradients that expose colour banding on 6-bit and FRC panels.
Black LevelPure black plus a near-black shadow ladder to judge black depth and spot crush.
RGB Channel TestIsolate red, green and blue one channel at a time to find a dead or weak subpixel.
Colour DepthDark-zoom ramps and near-value pairs that reveal your real bit depth — 6, 8 or 10-bit.
Colour AccuracyA 12-hue wheel, saturation ramps and grey neutrality to spot a cast or oversaturated mode.
Blooming & HaloA bright shape on black to reveal the halo local-dimming backlights glow around highlights.
HDR TestDetect HDR capability, compare real P3 vs sRGB colour, and run contrast and highlight patterns.
Gamma CalibrationA fusion pattern that reveals your gamma by eye, plus shadow and highlight detail ladders.
Motion tests
Ghosting TestTrack a moving UFO to reveal motion-blur trails and overdrive overshoot; tune your response time.
Screen TearingFast-scrolling patterns that expose tearing, so you can confirm VSync or FreeSync/G-SYNC fixes it.
Refresh RateMeasure your display's real Hz live, with a gauge, frame-time chart and rating.
Flicker & PWMSteady fields for the pencil and camera tests that reveal PWM backlight flicker and eye strain.
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