Screen Brightness Tester
Test and adjust your screen brightness levels
Brightness Control
DarkBright100%
Test Patterns
Normal View
Current brightness: 100%
Testing Tips
- • Use different test patterns to check uniformity
- • Test in various lighting conditions
- • Check for dead pixels with solid colors
- • Use fullscreen for better testing
- • Adjust brightness for comfort
What to Look For
- • Even brightness across the screen
- • No flickering or artifacts
- • Color accuracy in different patterns
- • Proper black levels
- • No backlight bleeding
Technical Information
• This tool uses CSS filters to adjust brightness
• Hardware brightness controls may override software adjustments
• Different display technologies (LCD, OLED) may show different results
• Ambient light sensors can affect automatic brightness
• Wake Lock API support: ❌ Not supported