Output
Steady colors, steps or fine-line patterns
UserBenchmark / All Tools / Contrast Test
Display
Contrast Test
Compare light and dark steps to inspect clipping by eye.
Free to useNo downloadNo sign-up
Contrast Test · At a glance
Quick answer: Compare light and dark steps to inspect clipping by eye. Adjacent patches merging together indicate visible clipping under the current setup.
Contrast 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 the full grayscale and near-white steps while changing contrast.
- Keep the source pattern and ambient lighting fixed.
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
Adjacent patches merging together indicate visible clipping under the current setup. This is not a numerical contrast-ratio measurement.
Worked example and assumptions
Grayscale from black to white
Look for adjacent light and dark patches merging together. This pattern reveals clipping by eye; it does not measure a physical contrast ratio.
Look for adjacent light and dark patches merging together. This pattern reveals clipping by eye; it does not measure a physical contrast ratio.
What to check next
Reduce excessive contrast if bright steps disappear. Check black and white endpoints rather than judging one middle-gray patch.
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
Does the result give a contrast ratio?
No. Physical contrast requires measured black and white luminance. This page helps you see clipping and tonal separation.
How do I start the Contrast 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.