❯devtools

Display Tester

Calibrate monitor colors, detect dead pixels, test dynamic contrast steps, and check for backlight bleeding.

Screen Resolution1920 × 1080

Viewport Area1920 × 1080

Pixel Ratio (HiDPI)1x (Standard)

Color Depth24-bit Depth

Layout Orientationlandscape

Dead Pixel & Light Bleed Solid Tests

Solid fullscreen backgrounds help you instantly spot dead sub-pixels (black dots), bright/stuck sub-pixels (always-on colors), or uneven edge backlight bleeding (pure black test).

Or cycle all solids in a hands-on sequence:

Contrast & Gradient Calibration Sweeps

Observe the rendering of grey bands and smooth sweeps to evaluate your panel's contrast response limits and color banding depth levels.

Convergence, Sharpness & Focus Patterns

Focus lines, checkerboards, and vertical strips reveal sharpness anomalies, bad pixel-mapping configurations, and image scaling artifacts.

Custom Color Inspector Canvas

Select a custom hex value with the color picker utility and deploy it onto fullscreen canvas to inspect specific custom display bounds.

Inspect Color HEX

Tip: Wipe down your monitor screen with a microfiber cloth before starting stuck pixel tests to avoid mistaking real-world dust for monitor issues!

Stuck Pixel Revival GuidanceIf you locate a stuck sub-pixel (which remains continuously green, red, or blue), you can sometimes massage it back to action. Open a solid bright fullscreen canvas and gently apply light focal pressure using a soft microfiber cloth for a few seconds. Alternatively, flash active high-frequency color boxes over the area for an extended period to stimulate electrical connections.