Controller & Stick Drift Tester
Connect a USB or Bluetooth controller, then press a button to let your browser detect it. Inspect its inputs below or measure how far the sticks move while resting. The test reports what your browser receives; it cannot see movement already removed by controller firmware.
Controller input is processed in your browser and is not uploaded by this tool.
How to use it
Connect your controller and press a button. Select it below, move each stick and press each button. For drift testing, place the controller on a flat surface and leave both sticks untouched for four seconds.
How it works
For standard-mapped gamepads, axes 0/1 represent the left stick and 2/3 the right. Radial offset is sqrt(X² + Y²). A four-second sample reports average X/Y, average radial offset, the 95th percentile and maximum. The suggested starting deadzone is the maximum plus one percentage point, capped at 100%.
Limitations
This is not a hardware health score. Firmware deadzones, drivers, browser support and game deadzone shapes affect the result. Unmapped controllers show raw inputs without guessing stick assignments. Keep the tab visible throughout a drift test.
Frequently asked questions
Why is my controller missing?
Use HTTPS, connect by USB or Bluetooth, then press a controller button. Some browsers and embedded pages restrict gamepad access. Try opening the full tool directly.
Does this repair drift?
No. It measures the inputs exposed by your browser. A game deadzone may mask small drift, but this test cannot repair hardware.
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