OLED Gray Uniformity Test & Burn In Checker
Free online OLED gray test to check screen uniformity, detect burn-in marks, and spot panel banding. Adjust gray levels from pure black to pure white — no install needed.
Panel Uniformity Check
Display full-screen gray patterns to reveal uneven brightness, clouding, and mura defects across your entire panel.
8 Grayscale Presets
Quick-access presets from pure black (0) to pure white (255), covering the critical 5%–25% range where burn-in is most visible.
Fine Gray Level Control
Slider and ±1 buttons for precise RGB value adjustment. Test any gray level from 0 to 255 with smooth transitions.
All Screen Types
Works on OLED, QD-OLED, AMOLED, LCD, IPS, and VA panels. Test TVs, monitors, laptops, tablets, and smartphones.
Tap for Fullscreen Mode
Best results in a dark room
Testing Tip: 50% Gray
Best for uniformity testing
Gray Level Control
Fine-tune the gray level for precision testing
Quick Presets
Common gray levels for burn-in testing
Pro Tips for Best Results
- Test in a completely dark room
- Use fullscreen mode for accuracy
- Check all gray levels systematically
- Take your time at 5-25% gray levels
Why Use an OLED Gray Uniformity Test?
Gray uniformity testing is the most effective method to reveal burn-in, image retention, and panel manufacturing defects. By filling the screen with solid gray at various brightness levels, you can spot problems that are invisible during normal content viewing.
Gray Level Test Reference
Each level reveals different display issues
Complete Guide to OLED Gray Uniformity & Burn In Testing
“Gray patterns are the gold standard for detecting OLED burn-in and panel non-uniformity. Most professional reviewers use gray screens as their primary diagnostic tool.”
This free online OLED gray uniformity test lets you fill your screen with any shade of gray from pure black to pure white. Burn-in marks, banding, and dirty screen effect become clearly visible on gray backgrounds because your eyes can easily detect brightness variations against a uniform mid-tone surface.
How to Perform an OLED Gray Uniformity Test
Follow these steps for a thorough screen uniformity check:
- Dim your room lights and set your display to normal brightness (avoid max brightness).
- Click "Enter Fullscreen Mode" on the test canvas above for the most accurate results.
- Start with 50% gray (RGB 128) — this is the best level for spotting overall uniformity problems.
- Use the quick presets to cycle through 5%, 10%, and 25% gray — these reveal burn-in most clearly.
- Enable auto-cycle mode to automatically sweep through all gray levels every 3 seconds.
What to Look for in a Gray Uniformity Test
When viewing a full-screen gray pattern, watch for these common defects: darker patches that indicate mura or clouding, faint ghost images from previous static content (burn-in), horizontal or vertical bands that suggest panel manufacturing issues, and color tinting (the gray appears slightly pink, green, or blue in certain areas).
Understanding Gray Banding on OLED Displays
Gray banding appears as visible horizontal or vertical stripes when displaying gradient content. It is especially noticeable on large OLED TVs at 5%–20% gray. Banding occurs due to minor voltage inconsistencies between pixel rows or columns. While slight banding is normal on most consumer OLEDs, severe banding may indicate a defective panel worth warranty replacement.
Dirty Screen Effect (DSE) Test for Monitors & TVs
Dirty Screen Effect (DSE) looks like smudges or stains on a uniform gray background — as if the screen needs cleaning, but the marks never wipe away. DSE is caused by uneven application of display layers during manufacturing. It is most visible on 25%–50% gray. Our free gray test tool is specifically designed to help you detect DSE before your return window expires.
Important: Image Retention vs. Permanent Burn-In
Not all visible marks on a gray screen are permanent burn-in. Temporary image retention is common on OLED and can fade after a few minutes of varied content. To distinguish between the two: run a pixel refresher (if your TV has one), wait 10 minutes, then re-test. If the marks disappear, it was temporary retention. If they persist, it is likely permanent burn-in.
Supported Display Types for Gray Uniformity Testing
This gray uniformity test works on all major display technologies and devices:
OLED / QD-OLED / AMOLED
The most critical test for OLED owners. Check for burn-in, near-black uniformity, and color tinting that affects premium displays.
LCD / IPS / VA
Reveal backlight uniformity issues, IPS glow, and clouding on LCD monitors and TVs using gray level testing.
Phones & Tablets
Test smartphone AMOLED or LCD screens for burn-in from static UI elements like status bars and navigation.
Regular gray uniformity testing helps you detect display degradation early and provides visual evidence for warranty claims. Bookmark this free tool and test your screens periodically.