Dead Pixel Test
Cycle solid full-screen colors so you can look for dark or stuck pixels. You record what you see.
Visual inspection aidPrivacy-first
Tests run locally in your browser. We do not upload keystrokes, pointer paths, or media.
Important
- The page only shows patterns. It cannot detect pixels for you or issue warranty judgments.
Dead pixels stay dark on all colors. Stuck pixels stay bright in one color. Clean the screen first — dust can look like a pixel fault. The page only shows patterns; you record what you see.
Fullscreen not supportedWake Lock not supported
Your observation (local only)
Choose what you observed after reviewing the colors.
How to use
- Clean the screen surface.
- Click Start Test (no auto-fullscreen on load).
- Inspect each solid color. Use Space/arrows, click/touch, or autoplay (4s).
- Exit anytime, then record what you saw.
What the result means
- You are the sensor — the page cannot see pixels.
- Dark spots on every color may be dead pixels or debris.
- Bright stuck colors may be stuck subpixels.
Limitations
- Not a manufacturer warranty tool.
- Dust and coating defects can mimic pixels.
- Autoplay is slow on purpose — no rapid flashing.
Troubleshooting
- Hard to see small defects
- Use fullscreen, dim room lights, and view from multiple angles.
Related tools
FAQ
Can the website count dead pixels for me?
No. Browsers cannot read individual panel pixels. You must inspect visually.