Gamepad Tester

This gamepad tester reads your controller through the browser's Gamepad API and shows every input as it happens: each button with its pressure value, the analog triggers, both sticks as dots in a circle with their exact x and y values, and any extra axes the controller reports. Buttons stay green once they have registered, so one pass over the controller shows which ones never respond. If several controllers are connected you can switch between them. No software to install, and nothing is sent anywhere – the test runs entirely on your device.

Let go of both sticks and watch the dots. A healthy stick rests at or very close to the centre (values near 0.000). If a dot sits away from the centre or creeps around while you are not touching it, the stick is drifting. The dashed circle is the dead zone – most games ignore movement inside it. Drag the dead-zone slider to see how large a dead zone you would need to hide the drift; if it is larger than about 0.15, the stick usually needs cleaning or repair. Also roll each stick slowly around its edge: the dot should reach the outer ring in every direction.

Any controller your browser recognises as a gamepad works, including Xbox One and Series controllers, PlayStation DualShock 4 and DualSense, Nintendo Switch Pro, 8BitDo and most generic USB pads and arcade sticks. Controllers with the 'standard mapping' get named buttons (A/✕, B/○, LB/L1 …); others show numbered buttons and raw axes, which is normal. Vibration buttons appear when the browser supports rumble for that controller – mostly Chrome and Edge with Xbox and PlayStation pads.

Press a button after the page has loaded – browsers hide controllers until then for privacy. Check that the controller works in your operating system's settings, try another USB cable or port (some cables only charge), and close apps such as Steam that may take exclusive control. On phones and tablets, pair the controller over Bluetooth first. Safari and Firefox support controllers too, but button names and vibration support differ by browser.