About Dead Pixel Tester Online

Dead Pixel Tester Online is built around one primary job: helping people run a clear dead pixel test online. The tool displays full-screen solid colors so users can inspect phones, tablets, laptops, monitors, LCD panels, and OLED screens for dead pixels, stuck pixels, color issues, and uneven brightness.

The website also includes supporting browser-based tools for touchscreen testing, multi-touch checks, vibration, gyroscope, accelerometer, microphone, webcam, and speaker output. Each tool is designed as its own page so users can find the exact diagnostic test they need from search or from the all-tools directory.

Our design goal is simple: open the test quickly, keep instructions clear, and avoid unnecessary friction. The dead pixel tester changes colors locally in the browser, while camera, microphone, and sensor tools only request permission when the user starts that specific test.