Monitor Test Tools. Dead Pixels, Backlight Bleed & Color Accuracy
Diagnose any monitor in a browser tab. Cycle solid fills for dead pixels, scan gradients for banding, refresh the panel to recover OLED burn-in, and verify contrast. Every test runs zero-install, fullscreen, with a result-reading guide below.
All 10 tools
Browse other hubsDead Pixel Test
Cycle solid fills to spot stuck or dead subpixels.
Backlight Bleed Test
Pure-black fullscreen reveals IPS bleed in the corners.
Gradient Test
Smooth ramps for banding and 8-bit vs 10-bit checks.
- OLED
OLED Burn-In Fixer
Rotating pixel refresh that can reduce mild OLED retention.
Color Blindness Test
Ishihara-style plates for a quick self-check.
Contrast Ratio Test
Stacked black-and-white blocks to verify panel contrast.
Grid Alignment Test
Pixel grid for geometry and projector keystone fixes.
Refresh Rate Test
Sliding marker that exposes high-refresh smoothness.
Blue Light Filter
Warm-tone overlay for late-night reading.
- Aa
High Contrast Mode
Maximum-contrast accessibility preview.