Gamepad test (buttons, sticks, drift)

How to use

1. Connect the gamepad, then press any button so the browser reveals it.
2. Move the sticks and press buttons; the display follows.
3. Leave the sticks untouched and press “Measure centre drift (3 s)”.
4. Drag the deadzone slider to see which small offsets would be treated as 0.

Worked example

Example: a stick resting at (0.03, 0.04) has an offset of 0.05 (the vector length). A deadzone of 0.06 or more would hide it; the table suggests a value a little above the largest offset seen.

Limits

• The numbers are what the browser receives. They differ from what a game does after its own deadzone, scaling and calibration.
• The mean offset is the length of the average (x, y) over 3 s; the max is the largest single sample. A rough estimate, not a verdict on wear.
• Button and axis numbering depends on the controller and the browser’s mapping.
• Each browser decides when to expose a pad; some need a button press first.

Your inputs and results stay in this browser. Nothing is sent to a server.