Instantly diagnose stick drift on your PS4 controller directly in your web browser.
Stick drift on the PS4 DualShock 4 is incredibly common and happens when the controller's analog sticks register input without being touched. The root cause lies in the mechanical potentiometers—tiny carbon sensors underneath the thumbsticks that track directional movement. With regular gameplay, pressing L3/R3, and accumulating dust, these sensors physically degrade and lose their original center alignment. As the resistive material wears down, the electrical signals warp, causing the controller to constantly send a false resting position to your PlayStation 4.
When the 3-second test completes, the tool analyzes the micro-movements of your resting analog sticks and provides an immediate score:
Yes! Before you throw out your DualShock 4 or attempt risky soldering repairs, you can try recalibrating the stick's center offset via software. Controller Diagnostic Lab connects to your PS4 controller and writes a new deadzone calibration curve directly to its internal memory (NVS). By forcing the controller to accept its physically worn resting position as the true absolute center, you can eliminate minor to moderate drift entirely without spending a single dollar on replacement parts.
Yes, Controller Diagnostic Lab is completely free and open-source. There are no paywalls or hidden fees.
No! The tool runs entirely in your web browser. You just need to use a browser that supports the WebHID API, such as Google Chrome or Microsoft Edge.
Software calibration fixes the drift by adjusting the controller's internal deadzones and center offset (updating the NVS mirror). This is an immediate fix for moderate drift, but if the physical sensor continues to degrade over months of heavy use, you may eventually need to replace the potentiometer hardware itself.