Professional Online Monitor Testing Tool - Free & Easy to Use
Test your monitor, laptop screen, tablet, or smartphone display for dead pixels, stuck pixels, and other screen defects. Our comprehensive color testing suite helps you identify display issues quickly and accurately.
A dead pixel test is essential for evaluating monitor quality and identifying display defects. Dead pixels appear as small black dots that remain unlit, while stuck pixels display incorrect colors. Our free online dead pixel tester helps you detect these issues across all device types.
Dead Pixels: Completely non-functional pixels that appear as black dots regardless of the displayed color. These are permanent hardware failures.
Stuck Pixels: Pixels that display one color continuously, often appearing as red, green, or blue dots. Sometimes fixable through pixel fixing techniques.
Hot Pixels: Pixels that are always "on" and appear as bright white spots, most noticeable against dark backgrounds.
Test immediately after unboxing to identify manufacturing defects covered by warranty
Verify screen quality after any display repairs or replacements
Check used monitors and devices for hidden display issues
Ensure optimal display quality for competitive gaming and professional work
Our screen testing tool provides comprehensive pixel analysis with multiple test patterns. The color-specific tests help identify subpixel defects in red, green, and blue channels, while combination colors test RGB subpixel interactions.
This dead pixel checker works on all devices with web browsers: desktop monitors, laptops, tablets, smartphones, gaming displays, TVs, and professional monitors. No downloads or installations required.
You can run our free online dead pixel test directly in your browser. Simply start the test, switch through the solid color screens, and look for any black or stuck pixels.
Most true dead pixels cannot be fixed, but stuck pixels sometimes can. Our tool provides a stuck pixel fixer mode that rapidly cycles colors to revive stuck pixels.
No. Our dead pixel checker runs 100% online in your browser – no installation required.
Instant Online Test – check your screen in seconds.
Free & No Download – works directly in your browser.
Dual Function – detect dead pixels and fix stuck pixels.
Protect Your Monitor – early detection helps prevent further issues.
Works on Any Device – laptops, desktops, and even some mobile screens.
Our tool is designed for anyone who wants a fast, reliable, and 100% free dead pixel test.