Screen Test Tool

What is Screen Test Tool?

This free online tool helps you find dead and stuck pixels on any screen. Run solid color, pattern, or motion tests in full-screen mode and look for pixels that don’t match. It works on monitors, laptops, phones, and tablets and supports LCD, LED, OLED, AMOLED, and more. Start testing instantly—no downloads needed.

Key features

• Identify completely black pixels on your display in fullscreen mode.
• Find pixels stuck on specific colors using solid color tests.
• Run grid, line, and gradient tests for uniform screen quality.
• Detect response time issues like ghosting and motion blur easily.
• Support all devices including monitors, laptops, tablets, and phones.
• Switch tests quickly with arrow keys or clicking screen edges.