CH 04 · Screen
OLED Burn-In Test
This test cycles full-screen grey fields from 10% to 50%, then red, green and blue, to make retained images easier to see. Start the test and look for shapes that stay visible across fields. Nothing leaves your device.
Eight flat fields fill the screen: five greys from 10% to 50%, then pure red, green and blue. A flat field makes an uneven patch easy to see: the shadow of a logo, a menu bar or a game's HUD. Each field stays for five seconds, so nothing changes faster than once every three seconds.
- Temporary image retentionA faint ghost of a recent image that fades within minutes or hours. It is normal on OLED screens after bright static content and is not damage.
- Burn-inA shadow that stays in the same place on several grey fields and does not fade, even after the screen has shown moving content for a day. It is permanent wear of the pixels that were lit hardest.
- How to lookDim the room, set the brightness you normally use and look from straight on. A shape that shows on several fields in the same place is more likely burn-in than one that shows on a single field.
- To avoid burn-inUse a dark theme, let the screen sleep, hide the taskbar or dock when you can, and leave the maker's pixel shift and panel care options on.
The Demo runs the test in a window on this page instead of full screen, with sample values where a device would be read. Its result is labelled Demo and is never yours.
What the test checks
OLED burn-in can leave a faint outline or patch where an image stayed on screen. This screen burn test shows full-screen fields at set levels so you can look for those marks against changing backgrounds.
The test cycles through grey at levels from 10% to 50%, followed by red, green and blue fields. A retained image may stand out more clearly on one field than another, so watch the whole cycle rather than judging from a single colour.
Reading the fields
Look for shapes that resemble items often shown in the same place, such as a fixed icon or bar. If a shape remains visible in the same spot as the fields change, the screen may have image retention. A uniform field with no fixed shapes visible gives no obvious sign during this check.
Temporary image retention can look like burn-in, but it may fade after the image has been gone for a while. Burn-in is more likely when the same mark stays visible across the grey and colour fields over time. This visual check cannot prove whether a mark is permanent, so compare again later before drawing a conclusion.
If you see a mark
A mark that appears on the fields can point to image retention or burn-in. First note where it appears and whether it remains in the same place across grey, red, green and blue. Check the display again later to see whether the mark has faded.
A mark that fades may have been temporary retention; one that stays visible may be lasting burn-in. The page can show what is visible, but it cannot determine the cause of the mark.
Limits of this screen check
The test helps make retained images visible by changing the whole screen to plain fields. It does not measure how severe a mark is or establish whether it will fade. Your result depends on what you can see on the display while the fields are shown.
Room lighting and the way you view the screen can affect how easy a faint shape is to notice. If you are unsure, look through the full cycle again and compare the same area across the fields.
Browser support
| Browser | Runs |
|---|---|
| Chrome and Edge on a computer | Yes |
| Firefox on a computer | Yes |
| Safari on a Mac | Yes |
| Safari on iPhone | PartlyNo full screen on iPhone: the test fills the window instead. |
| Safari on iPad | Yes |
| Chrome on Android | Yes |
| Samsung Internet | Yes |
| Browsers inside apps | Yes |
Source: MDN browser-compat-data 8.1.8 · checked November 6, 2026
Questions
How do I run an OLED burn-in test?
Open the test and let it cycle through the full-screen fields. Look for fixed shapes or patches that stay in the same place as grey, red, green and blue appear.
What does a mark on the screen mean?
A visible mark may be image retention or burn-in. If it fades after the image has been gone for a while, it may have been temporary retention; a mark that remains may be lasting burn-in.
How can I tell burn-in from temporary image retention?
Temporary retention may fade over time, while burn-in is more likely to stay visible. This check can show a mark, but it cannot prove whether the mark is permanent. Compare the same area again later.
Why does the test use grey and colour fields?
The test cycles through grey levels from 10% to 50%, then red, green and blue. Changing the full-screen field can make a retained image easier to see against some colours or grey levels.
Does this test repair screen burn-in?
No. It displays fields to help you check for retained images. It does not repair the screen or tell you the cause of a mark.