Controller Tester: Find Out What Your Gamepad Is Actually Doing

Field notes

The tester uses the browser gamepad interface to expose button events, analog trigger pressure, stick coordinates, and vibration support. Its drift routine samples both sticks for approximately three seconds and uses 0.09 as a stated house threshold, while the guide distinguishes ordinary 0.01–0.02 resting noise from movement likely to affect games. The page also documents practical failure modes, including charge-only USB cables, background tabs, and controllers that remain hidden until a button is pressed.