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Pixel & Color Dead Pixel Test Stuck Pixel Fixer Greyscale & Banding Test Backlight Bleed Test Contrast & Brightness Test
Motion & Refresh Refresh Rate Test Ghosting & Response Time Test Screen Flicker Test
Display Info Screen Resolution Checker Viewport Size Checker
Touch & OLED Touch Screen Test OLED Burn-in Test
Calculators PPI Calculator Aspect Ratio Calculator Screen Size Calculator
Monitor Test, all tests in one launcher View all tools

Monitor Test

  • Free
  • Runs in browser
  • No download

Run all monitor tests in sequence

Click any test below. Work from top to bottom for a complete display health check.

Dead Pixel TestCycle solid colors to spot dead and stuck pixels.Run TestFlashingStuck Pixel FixerRapidly cycles colors on a small area to try to revive a stuck pixel.Run TestGreyscale & Banding TestSmooth gradients reveal banding and uneven greys.Run TestBacklight Bleed TestA dark screen shows light leaking at the edges.Run TestContrast & Brightness TestNear-black and near-white steps to tune settings.Run TestRefresh Rate TestMeasure the frame rate your browser draws at.Run TestFlashingGhosting & Response Time TestMoving targets reveal trails and smearing.Run TestFlashingScreen Flicker TestPatterns that help you notice visible flicker.Run TestScreen Resolution CheckerSee resolution, viewport and pixel ratio.Run TestViewport Size CheckerLive browser window size as you resize.Run TestTouch Screen TestDraw across the screen to find dead touch zones.Run TestOLED Burn-in TestSolid colors and grids to spot image retention.Run TestPPI CalculatorPixel density from resolution and diagonal.Open calculatorAspect Ratio CalculatorFind ratios and resize without distortion.Open calculatorScreen Size CalculatorWidth and height from diagonal and ratio.Open calculator

Found a problem? Compare top-rated monitors

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Best overall

LG 27UK850-W 27" 4K IPS USB-C

27" · 3840 × 2160 · 60 HzCheck price
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Best for gaming

ASUS TUF Gaming VG27AQ 27" 1440p 165Hz IPS

27" · 2560 × 1440 · 165 HzCheck price
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Best for creators

BenQ PD3220U 32" 4K Thunderbolt 3 IPS

32" · 3840 × 2160 · 60 HzCheck price

Related tools

All screen tests
Dead Pixel TestCycle solid colors to spot dead and stuck pixels.Run TestBacklight Bleed TestA dark screen shows light leaking at the edges.Run TestRefresh Rate TestMeasure the frame rate your browser draws at.Run TestScreen Resolution CheckerSee resolution, viewport and pixel ratio.Run Test

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