Online gamepad test
Check controller buttons, sticks, drift, deadzone and vibration.
Start testWhat can you test?
Connect a controller and ACC64 will show button presses, stick movement and other inputs in real time. You can use it to check for stick drift, deadzone problems and buttons that do not register correctly.
Vibration testing is available when your browser and controller expose it. Browser support varies, so a missing vibration option does not automatically mean the controller is faulty.
How to test your controller
- Connect the controller by USB or Bluetooth, then press a button so the browser can detect it.
- Leave both sticks untouched for a moment and check whether they settle near the center.
- Move each stick slowly through its full range and press the buttons and triggers one at a time.
- Repeat anything that looks wrong. A problem that appears every time is much more useful than a single odd reading.
What should a healthy controller look like?
Buttons should respond only when you press them, and stick movement should look smooth and predictable. Small resting values can be normal, but movement that continues while you are not touching a stick may point to drift.
If something looks wrong
- Reconnect the controller and try another USB port, cable or Bluetooth connection.
- Close games, Steam Input or other controller software that may be remapping the device.
- Test the controller again in the same conditions. If the same input keeps misbehaving, compare it on another computer if possible.
Privacy
Controller input is read by the page in your browser. ACC64 does not need an account and does not upload your button or stick input.
Frequently asked questions
How do I know if my controller has stick drift?
Leave the stick untouched and watch its position. If it repeatedly moves away from center on its own, especially in the same direction, drift is possible.
Why is my controller not detected?
Press a button after connecting it; some browsers expose a controller only after the first input. If it still does not appear, reconnect it, try another port or check the Bluetooth connection.
Can ACC64 test controller vibration?
Yes, when the browser and controller expose a compatible haptics interface. If the option is unavailable, that alone does not mean vibration is broken.
Do I need to install anything?
No. The tester runs in a modern browser.
Does ACC64 save controller input?
No. Button and stick input is processed in your browser and no account is required.