HOW TO USE
1) Choose a test on PAGE 1
2) Tap/click to enter fullscreen (where supported)
3) Exit with ESC or tap/click screen
4) Dead pixels: use 767
5) Banding: use 766 and 769
BEST ORDER (QUICK CHECK)
761 Black → backlight bleed / glow
762 White → tinting / uniformity
763–765 RGB → stuck sub-pixels
766 Gradient → tone steps
769 Banding → stripes / steps
FAQ (QUICK)
Nothing happens? Some browsers block auto fullscreen.
How to exit? ESC or tap/click screen.
Is this safe? Avoid staring at white for long.
OLED warning? Don’t leave static screens for hours.
More help? See PAGE 3.
TROUBLESHOOTING
iPhone/iPad: tap once, then fullscreen if offered.
Auto-brightness: disable briefly for best results.
Battery saver: may dim the display during tests.
External monitor: set native resolution if possible.
Banding: check in a dark room for best visibility.
FAQ (DETAILED)
What is a dead pixel? A pixel that stays off (black).
What is a stuck pixel? A pixel stuck on one colour.
What is banding? Visible steps in smooth gradients.
What is glow/bleed? Light leakage on dark screens.
Do these fix pixels? No—these are tests only.
MINI BLOG: WHY THESE TESTS WORK
- Black screen reveals backlight bleed and IPS glow.
- White screen shows tinting and uniformity problems.
- RGB screens help spot stuck pixels and sub-pixels.
- Gradients reveal tone steps (posterisation) and banding.
- Checkerboard can reveal scaling + sharpening artefacts.