Dead Pixel Test & Monitor Patterns — Full-Screen Manual Inspection
Inspect your display with static black, white, RGB, gray, gradient and grid patterns. Mark suspicious positions and download a manual observation record.
Screen Inspector
Choose your inputs, or load the working example to explore the result. Your files stay on this device.
Your inputs
Required fields are marked with an asterisk.
Your result
Review your output, then save it to your device.
Make the next step clear.
Your findings, assumptions and next steps will appear here after you run the check.
Screen Inspector · https://screen.kitforma.com/ · KitForma
Runs locally in your browser
Download actual usable output
Explicit assumptions and supported inputs
Understand the evidence.
Focused guides explain the rules, the edge cases and the checks worth doing before you act.
Inspect a screen for suspicious pixels
Use several solid colors before classifying what you see.
Read the guide ↗Field guide / 02Use gray and gradient patterns carefully
Understand the effect of display processing and viewing conditions.
Read the guide ↗Field guide / 03Document a manual monitor inspection
Keep coordinates, settings and limitations together.
Read the guide ↗Before you start
Can the browser automatically detect dead pixels?
No. A browser can display patterns, but it cannot inspect the physical panel.
Does this repair stuck pixels?
No. The viewer provides static inspection patterns and a manual record; it makes no repair claim.
Will a screenshot show a panel defect?
Usually not. A screenshot records the rendered image, not the light emitted by a damaged physical pixel.
Can I use this on a phone or external monitor?
Yes, where the browser supports the viewer. Full-screen support varies; browser-area mode remains available.
Does it use rapid flashing?
No. Colors change only when you click or press an arrow key.
Sources & assumptions
Formats, algorithms and supported features are documented below. Check the stated scope and inspect your output before using it.
- EIZO monitor test ↗
Monitor inspection patterns and the influence of browser color handling.
- Fullscreen API ↗
Browser full-screen capabilities and user-activation requirements.
- Device pixel ratio ↗
CSS pixels can differ from physical device pixels.
Reviewed 2026-10-17. Read our methodology or report an issue.