All-around check
A complete pass through the basics.
YOUR DISPLAY, UNDER A CLOSER LOOK
Gray screen uniformity test.
Compare several gray screen levels to notice patches, bands, or tint by eye.
↗ No installation◉ Visual inspection⌂ Stays on your device
5% gray
RGB 13, 13, 13YOUR TEST PATTERN
Start with 5% gray.
Select a color, then give it the whole screen.
← → Switch colorsEsc ExitF Fullscreen
Tap the pattern to show controls. No automatic cycling or flashing.
◎ You inspect the physical screen. Nothing is scanned or uploaded.Go at your own pace ↗
YOUR EYES. YOUR NOTES.
Keep a little record.
Save what you noticed, so you can compare later. One record per test, stored only in this browser.
⌂ Local to this deviceNo automatic result. Choose only what you actually observed.
A MORE FOCUSED LOOK
Something specific on your mind?
Choose a check for what you’re seeing.
Screen bleed (LCD)
Compare LCD black and near-black fields for edge light.
Dead pixel test
Fixed dark, bright, or colored points.
Screen burn-in
Lingering logos, shapes, or uneven tones.
OLED screen test
Compare gray and color fields on OLED or AMOLED screens.
LCD screen test
Compare familiar colors and gray levels on an LCD.
TAKE A MINUTE. TAKE A CLOSER LOOK.
How to compare gray-screen uniformity
You do the observing.
We provide the patterns.
- 01
Use your usual viewing position and a comfortable brightness. Reflections and aggressive dark-room viewing can change what you see.
- 02
Compare 5% and 10% gray for near-black areas, then 20% and 50% gray for broader patches or tint.
- 03
Keep the same screen and settings. Note the shade and location where an area is easiest to see.
- 04
Repeat during normal content. A uniformity measurement needs calibrated equipment and is outside this visual check.
BEFORE YOU DRAW A CONCLUSION
Your screen check questions
Which gray level should I look at first?
Compare several values. Low gray can make near-black banding easier to notice; mid gray can help expose broader tint and clouding. Results vary by panel and viewing conditions.
Does this uniformity test measure screen brightness?
No. It places uniform patterns on screen for your eyes. Luminance mapping requires a sensor and measurements at defined points.
Can I decide a return from one banding test?
One browser pattern cannot determine manufacturing tolerance or warranty coverage. Repeat during ordinary use and check the policy for your exact model.
Is this a gray or greyscale screen test?
Yes. It shows digital gray levels, also spelled grey, for visual comparison. The levels are not measured brightness percentages.
Can this OLED gray uniformity test measure luminance?
No. It displays different digital gray values for your eyes to compare. Measuring luminance uniformity requires a sensor and fixed measurement positions.
Can I use white to check screen uniformity?
Yes. This tool includes a white field for a visual look at broad tint or uneven areas. Compare it with gray levels at your normal brightness; the browser cannot map or score uniformity.
Can I run a screen uniformity test on an iPhone?
Yes. Open the gray and white fields in a modern phone browser and compare them at consistent brightness. Browser bars, adaptive color settings, and viewing conditions can affect what you see.
MAKE SENSE OF WHAT YOU SEE
Put your observation in context.
Compare the clues, then return to the tool to repeat your check.
Instructions source-checked · RTINGS: how they measure monitor gray uniformity. Manufacturer guidance explains the concepts; it does not certify this tool or your panel.
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