Controller Tester Measures the Health of Your Gamepad

Why it surfaced

This is more than a button-blinking demo: it records an eight-second resting sample for drift, suggests a protective 2%–30% deadzone, keeps a live input history, and exports HTML, JSON, or CSV reports. It also states an important limitation clearly—the polling result reflects what the browser observes, not the controller’s full USB latency.

A browser-based diagnostic bench for testing controller buttons, sticks, triggers, vibration, deadzones, and observed input timing.