Screen Tester
Detect dead pixels, stuck pixels and burn-in risk
Quickly test your LED TV for defects like dead pixels, light bleed, vertical banding, and screen uniformity. Works on all smart TVs, desktops, laptops, mobiles, and tablets. Simply press Space to enter fullscreen, press ESC to exit anytime.
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Select a test and tap to cycle through.
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Suitable for projector setup, presentations, and OLED screen protection.
Test Timer
Professional Screen Tester - Detect Display Defects
Comprehensive Screen Testing Tools for Dead Pixels, Burn-in, and Display Quality
BlackScreen Screen Tester provides professional-grade display testing capabilities to detect dead pixels, stuck pixels, burn-in risks, color accuracy, uniformity, and more. Test your LED TV, monitor, laptop, tablet, or smartphone screen with 12 specialized test patterns. Simply press the spacebar to go fullscreen, and ESC to exit - no installation required.
Screen Test Features
Dead Pixel Detection
Use solid color backgrounds (black, white, red, green, blue) to identify dead pixels, stuck pixels, and defective subpixels. Essential for quality control when purchasing or evaluating display devices, ensuring your screen meets professional standards.
Uniformity Testing
Test screen brightness uniformity with 50% gray patterns and gradient tests. Detect backlight bleeding, vertical banding, and color uniformity issues that can affect viewing experience and display quality.
Sharpness & Clarity Tests
Evaluate screen sharpness and text clarity with specialized test patterns. Perfect for calibrating monitors, verifying display settings, and ensuring optimal image quality for professional work and content creation.
Viewing Angle & Gamma Tests
Test viewing angle performance and gamma calibration with concentric circle patterns. Essential for evaluating display quality from different angles and ensuring consistent color reproduction across the screen.
Burn-in Detection
Use grid and checkerboard patterns to detect image retention and burn-in risks. Critical for OLED displays, preventing permanent screen damage and identifying potential display issues before they become serious problems.
Response Time Testing
Test screen response time and motion clarity with specialized test patterns. Ideal for gamers, video editors, and professionals who need fast, responsive displays with minimal motion blur.
Why Choose BlackScreen Screen Tester?
No Installation Required
Access professional screen testing tools directly in your browser. Works on all devices - smart TVs, desktops, laptops, tablets, and smartphones. Press spacebar for fullscreen, ESC to exit - simple and intuitive for everyone.
12 Specialized Test Patterns
Comprehensive test suite including test patterns, solid colors, gradients, sharpness tests, viewing angle patterns, gamma tests, response time tests, color demos, grids, and checkerboards. Everything you need for thorough display evaluation.
Built-in Test Timer
Track your testing duration with automatic timer functionality. Timer starts automatically in fullscreen mode, helping you organize screen testing sessions and monitor testing progress efficiently.
Professional Quality Testing
Based on EIZO professional monitor testing capabilities, our tool provides industry-standard test patterns for accurate display evaluation. Perfect for both consumers and professionals who demand reliable screen quality assessment.
Screen Tester Use Cases
Display Quality Control
Use screen tester to verify display quality before purchase or after receiving new devices. Detect manufacturing defects early and ensure your screen meets quality standards for professional work or personal use.
Monitor Calibration
Calibrate your monitor settings using test patterns to achieve optimal brightness, contrast, gamma, and color accuracy. Essential for photographers, designers, and video editors who need accurate color representation.
OLED Burn-in Prevention
Regularly test OLED displays for image retention and burn-in risks. Use grid and checkerboard patterns to identify potential issues early, extending display lifespan and maintaining screen quality.
Multi-Monitor Setup
Test multiple monitors simultaneously to ensure consistent color, brightness, and uniformity across all displays. Perfect for professional setups requiring matched display characteristics.
Screen Defect Detection
Identify dead pixels, stuck pixels, and color uniformity issues that may affect your viewing experience. Quick and reliable testing helps you decide whether to repair, replace, or continue using your display.
Display Troubleshooting
Diagnose display problems using specialized test patterns. Identify issues like backlight bleeding, color banding, response time problems, and viewing angle limitations to troubleshoot screen quality issues effectively.
Explore More BlackScreen Tools
Solid Color Mode
Return to BlackScreen homepage to experience solid background mode, providing the purest fullscreen experience for presentations, photography, and screen testing.
Cool Visual Themes
Discover stunning dynamic visual themes like Aurora skies, ocean depths, and starfields. Transform your display into a calming, immersive canvas perfect for presentations, breaks, and creative inspiration.
Clock Themes
Experience our collection of beautiful clock themes including digital clocks, binary clocks, wave clocks and more, making your screen both practical and aesthetically pleasing, combining functionality with artistry.
Custom Themes
Create personalized display backgrounds by uploading your own images or choosing custom colors. Perfect for brand presentations, product showcases, and creative projects with complete creative freedom.
Press the spacebar to enter fullscreen mode for comprehensive screen testing, and press ESC to exit at any time. Begin your professional display evaluation!