A free web-based tool to diagnose gaming controllers without installing software. It provides instant visual feedback for joystick performance, including:
Stick Drift Testing: Measure drift magnitude to see if your sticks move on their own.
Circularity Check: Calculate the average circularity error to test precision.
Input Visualization: View real-time X/Y coordinates and button presses.
Works with all major gamepads, including ALPS, Hall Effect, and TMR sensors.
