Screen pixel test
Show solid colours and a grid for manual monitor inspection, with optional fullscreen display.
Inspect your screen manually using solid colours and a grid. Clean the screen first. Browser zoom and device scaling affect grid pixels.
Arrow keys or Space change patterns. H hides or shows controls. Escape exits. There is no flashing sequence or automatic diagnosis.
What it does
Show solid colours and a grid for manual monitor inspection, with optional fullscreen display.
How to use it
- Start the test and inspect white, black, red, green, blue and grid patterns. Use buttons or arrow keys to change patterns.
- Fullscreen is optional. H or a background click hides or shows controls; Escape exits. Finish inspection records completion only when you choose it.
- This is a manual visual check. It does not diagnose, count or repair pixels. Browser zoom and operating-system scaling affect the grid.
Example
Switch from a white screen to black, then inspect primary colours for visible irregularities.
Methodology
Browser CSS displays static solid sRGB colours and a 20-CSS-pixel grid. Patterns change only on user input.
Limitations
No automatic hardware access, calibrated colour measurement, burn-in repair or flashing sequences. Browser fullscreen may be unavailable.
Automation
This tool runs in your browser. No upload API or MCP endpoint is available.
View capabilities and documentationReference updated
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