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Browser-based display diagnostics for every screen. Check refresh rate, hunt for dead pixels, and evaluate ghosting — all without installing anything.
Detect whether your monitor is running at 60Hz, 144Hz, 240Hz, or higher. Uses requestAnimationFrame timing for accurate results.
Cycle through 8 solid-color fullscreen panels to spot dead, stuck, or hot pixels on any monitor or laptop screen.
Watch a moving object at adjustable speeds to evaluate your display's pixel response time and motion blur.
Display 12 sRGB reference swatches and 4 gradient ramps to visually evaluate your monitor's color reproduction.
Show near-black and near-white patches to reveal how many brightness levels your display can distinguish.
Fullscreen black at adjustable brightness levels to expose backlight bleed, clouding, and IPS glow.
Cycle through solid colors with an optional grid overlay to check for uneven brightness or tinting across your panel.
Animated objects moving at different speeds to evaluate pixel response time, motion blur, and overdrive artifacts.
Manufacturers list ideal specs — your actual experience depends on how your monitor is configured and what your cable supports. These tests show you what your display is actually doing.