Hardware
Hardware
Refresh Rate Test
Measure your display's real, live refresh rate right in your browser using requestAnimationFrame timing, and catch a monitor advertised at 144Hz or higher that is really only running at 60Hz.
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Greyscale Test
Check a display for banding, shadow crushing, and highlight clipping with a real continuous 0-255 grey gradient, an interactive value readout, and a dedicated near-white patch set.
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Burn-in Test
Reveal OLED, plasma, or other display burn-in with solid gray, black, and white fields, plus a Flicker Boost mode that alternates gray shades to make faint marks easier to spot.
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Dead Pixel Test
Cycle full-screen through 9 solid colors to spot dead, bright, or stuck pixels on any monitor, laptop, phone, or TV, with an auto-play mode for hands-free scanning.
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Flicker Test
A clean reference screen and step-by-step instructions for detecting PWM backlight flicker with your phone camera, plus a strobe reference.
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Gamma Calibration
Estimate your display's effective gamma with the classic stripe-vs-solid-patch test across five candidate gamma values, sRGB 2.2 marked.
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Blooming Test
Test your Mini LED or FALD display for blooming with a star field, center, corner, and edge dot patterns and adjustable dot size.
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Brightness Test
Test your screen with a 10-step brightness ladder and a 9-zone fullscreen uniformity check to spot clouding or uneven backlighting.
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Color Accuracy Test
Play an interactive color-matching game: reproduce a target color with RGB sliders and get a perceptual accuracy score.
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Color Banding Test
See exactly what 6-bit vs 8-bit color banding looks like with an honest, adjustable mathematical quantization simulation.
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Gradient Test
Check your screen for color banding with grayscale, RGB channel, radial, and hue wheel gradient patterns, in fullscreen.
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P3 Gamut Test
Compare sRGB against Display P3 across 12 hues around the color wheel to see exactly where wide-gamut displays show more vivid color.
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sRGB Color Test
Check your display against a 24-patch sRGB reference set: primaries, memory colors, and a neutral grey ramp, with a fullscreen patch view.
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RGB Channel Test
Test your screen for dead, stuck, or hot pixels with pure red/green/blue channel isolation plus any custom color via hex or picker.
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Backlight Bleed Test
Test your LCD screen for backlight bleed with a full-screen pure black pattern and a 3x3 scan grid, plus IPS glow guidance.
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Black Level Test
Test how well your screen distinguishes near-black shades with 12 labeled RGB patches and a fullscreen single-patch view.
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Screen Tearing Test
Test your screen for tearing with sweeping bars at an adjustable frame-locked speed, plus a VSync/FreeSync/G-Sync explainer.
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Touch Screen Test
Test a touchscreen with multi-touch visualization, a free-draw precision canvas, and a dead-zone grid coverage scan.
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HDR Test
Check what your browser and display report about HDR and wide color gamut support, with a real sRGB vs Display P3 visual comparison.
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Ghosting Test
Test your monitor for screen ghosting and motion blur with a moving block, scrolling text, or fine-line pattern at an adjustable speed.
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Scroll Test
Test your mouse scroll wheel or trackpad with live direction, delta values, speed, and automatic wheel chatter detection.
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Antenna Length Calculator
Calculate the physical length of a dipole, vertical, or loop antenna from an operating frequency, right in your browser.
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Battery Health
Live battery percentage, charging state, and time estimates, plus a session-based full-charge runtime estimate and cycle usage tracker, low-battery and full-charge alerts, battery care tips, and direct steps to check your real battery health on Windows, macOS, Chromebook, and iPhone.
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Screen & Monitor Tester
Check a laptop, monitor, or TV before you buy it secondhand: dead/stuck pixel sweep, light bleed and IPS glow test, burn-in and banding check, refresh rate measurement, motion/ghosting test, and a black/white level test.