GamePadTestLab
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Controller guides

Know what your controller is telling you. Our guides break down every diagnostic, explain what your results mean, and show you what to do next — with a test for every fix.

  • How much stick drift is normal?

    Every analog stick reports a little movement at rest. Learn how to separate ordinary sensor noise from repeatable stick drift and how to test the result responsibly.

  • What is controller deadzone?

    Deadzone explained in plain language: inner and outer deadzones, responsiveness, stick drift, how to choose a value, and what a browser test cannot determine.

  • How to test a used controller before you buy

    A practical checklist for a second-hand gamepad: connection, resting drift, every button, trigger travel, stick range, and limits a browser test cannot rule out.

  • USB vs Bluetooth for controller testing

    How connection type can change controller detection, browser-observed update timing, feature exposure, and how to compare wired and Bluetooth results fairly.

  • Controller not detected in the browser

    An ordered controller-detection checklist covering page focus, first input, data cables, Bluetooth pairing, browser support, remapping software, and limits of diagnosis.

Diagnostics

  • Gamepad tester
  • Stick drift
  • Deadzone
  • Buttons
  • Triggers
  • Health check

By controller

  • PS5 / DualSense
  • Xbox
  • PS4 / DualShock 4
  • Switch Pro

Advanced

  • Circularity & range
  • Vibration
  • Update rate
  • Used controller check

About GamePadTestLab

  • Guides
  • Testing methodology
  • About
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  • Terms

Your controller inputs stay on this device. GamePadTestLab runs every measurement in your browser and uploads nothing.

GamePadTestLab is an independent project and is not affiliated with, endorsed by or sponsored by Sony Interactive Entertainment, Microsoft, Nintendo or 8BitDo. PlayStation, DualSense, DualShock, Xbox, Nintendo Switch, Joy-Con and all other trademarks are the property of their respective owners and are used only to describe compatibility.