Update date: 2026-01-11
About Dead Pixel Test Tool
Dead Pixel Test Tool is a professional, free online utility designed to help users detect screen defects including dead pixels, stuck pixels, and display uniformity issues. Our tool works on any device with a web browser - monitors, laptops, smartphones, and tablets.
✨ Key Features
- 🎯 Dead Pixel Detection: Comprehensive solid color tests to identify non-functional pixels
- 🌈 8 Color Tests: Black, white, red, green, blue, yellow, cyan, and magenta backgrounds
- 📐 Pattern Tests: Gradient, grid, line, and text clarity tests for advanced display quality assessment
- 🏃 Motion Tests: Ghosting and response time tests using full-screen moving elements
- 📱 Universal Compatibility: Works on all devices - desktop monitors, laptops, phones, tablets
- 🔍 Professional Grade: Used by technicians, gamers, and quality control professionals
- 🌐 Multilingual: Available in English, Chinese, and Japanese
- ⚡ No Installation: Browser-based tool, no downloads required
🔧 How It Works
Color Tests
Our solid color tests display pure colors across your entire screen, making it easy to spot:
- Dead Pixel: Appear as black dots regardless of background color
- Stuck Pixels: Show fixed colors (red, green, blue, or white)
- Display Uniformity Issues: Variations in brightness or color across the screen
Pattern Tests
Advanced tests for professional display evaluation:
- Gradient Test: Checks color transition smoothness and banding
- Grid Test: Reveals pixel alignment and geometric distortion
- Line Test: Detects sub-pixel rendering issues
- Text Clarity: Evaluates sharpness and readability
Motion Tests
Specialized tests for gaming and video applications:
- Ghosting Test: Detects trailing images during fast motion
- Response Time Test: Measures pixel switching speed
🛡️ Privacy & Security
- No Data Collection: We don't collect any personal information
- Client-Side Only: All tests run locally in your browser
- No Cookies: No tracking or analytics cookies
- Secure: Uses standard web technologies without external dependencies
📱 Device Compatibility
- Desktop Monitors: LCD, OLED, LED, CRT displays
- Laptops: All screen types and sizes
- Smartphones: iOS and Android devices
- Tablets: iPad, Android tablets, and e-readers
- Gaming Displays: High refresh rate and HDR monitors
💡 Pro Tips
- Test in a dark room for better visibility of dead pixels
- Use different viewing angles to detect uniformity issues
- Take your time - some defects are only visible with careful observation
- Test both before and after warranty periods
About the Developer
Created by a team passionate about display technology and user experience. For questions or suggestions, reach out at [email protected]