Output
Steady colors, steps or fine-line patterns
UserBenchmark / All Tools / Subpixel Layout Test
Display
Subpixel Layout Test
Inspect fine RGB lines and text with a magnifier or macro camera.
Free to useNo downloadNo sign-up
Subpixel Layout Test · At a glance
Quick answer: Inspect fine RGB lines and text with a magnifier or macro camera. The apparent order can be altered by scaling and antialiasing.
Subpixel Layout Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Inspect fine RGB lines using a magnifier or macro camera.
- Keep native resolution and browser zoom at 100%.
Input
Manual visual inspection
Browser requirement
Native resolution; fullscreen support
Processing
Runs on your device; no tool-result upload
How it works and what the result means
These are visual inspection patterns. The page cannot read individual panel pixels, measure nits or contrast ratio, diagnose a panel automatically, or repair dead pixels.
Reading the result
The apparent order can be altered by scaling and antialiasing. Physical subpixel structure is best judged on a magnified image of the panel itself.
Worked example and assumptions
One-CSS-pixel repeating RGB lines
Use a macro camera or magnifier to inspect the physical panel. Browser zoom, OS scaling and text antialiasing can change the apparent pattern.
Use a macro camera or magnifier to inspect the physical panel. Browser zoom, OS scaling and text antialiasing can change the apparent pattern.
What to check next
Avoid drawing conclusions from a screenshot because screenshots record the source image rather than physical subpixels.
Use native screen resolution and 100% browser zoom for fine patterns. Disable adaptive brightness for comparisons. PWM inspection needs an external camera; banding can also be a camera artifact.
Frequently asked questions
Why does a screenshot not reveal my panel layout?
It contains digital pixel values before the panel displays them. RGB, BGR or other physical arrangements are properties of the screen hardware.
How do I start the Subpixel Layout Test?
Choose a pattern and open fullscreen. Inspect the entire panel, then click to cycle patterns. Press Escape to leave fullscreen.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.