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Dead Pixel Test

Full-screen solid colors to help you spot dead or stuck pixels and uniformity issues.

Current color: White HEX: #FFFFFF Shortcuts: ←/→ change, Space/F fullscreen, H UI

Controls

Tip: Use fullscreen in a dim room and inspect corners and edges for uniformity.

Dead pixel, bright pixel, or stuck pixel?

Dead pixels stay dark, bright pixels stay lit, and stuck pixels often keep one color. Test in fullscreen and switch colors several times before making a warranty decision.

Dead pixels stay black, while stuck pixels stay lit, often red, green, or blue. Switching solid colors makes them easier to spot.
• Solid color set (white/black/RGB and more) • Fullscreen toggle + UI hide mode • Keyboard shortcuts for fast cycling • Shows HEX value for the current color
1) Enter fullscreen. 2) Cycle colors with ←/→. 3) Scan the screen slowly. 4) Hide UI for a clean view if needed.
• This tool renders flat colors using a CSS background • Results depend on panel type and viewing angle • Uniformity and backlight bleed are easier to see on black or gray in a dark room
• Check a new monitor or laptop screen right after purchase • Inspect for stuck pixels after transport or pressure • Verify uniformity and backlight bleed for content creation • Quick test before and after monitor settings changes
Q: What's the difference between dead and stuck pixels? A: Dead pixels are always black, while stuck pixels stay lit in one color. Q: Can this fix dead pixels? A: No. It only helps you detect them. Q: How should I check the screen? A: Use fullscreen, set brightness to a normal level, and scan slowly, especially edges and corners. Q: Is fullscreen safe for OLED? A: Yes for quick checks, but avoid leaving a single bright color on OLED for a long time. Q: Can stuck pixels recover? A: Sometimes. Rapid color cycling or gentle pressure may help, but permanent defects require panel replacement. Q: Why does it look different at an angle? A: LCD panels have viewing-angle characteristics, so check from your normal viewing position.