How to read the stick visualizer
A centered stick should rest near the middle with only minor noise. Move the stick slowly to every edge and corner to see whether the dot reaches a stable outer ring or falls short in one direction.
Use Reset Baseline when the controller is resting untouched. The baseline does not change hardware calibration; it simply gives the page a local reference for center offset comparisons.
- Raw X/Y values show the live axis numbers exposed by the browser.
- Center offset estimates how far the idle stick sits from the current baseline.
- Peak reach tracks how far the stick has moved during the session.
- Movement trail helps reveal uneven range, square gates, and jumpy readings.
Browser and hardware limits
Gamepad API support, haptic feedback, MediaRecorder, and WebHID are exposed differently across Chrome, Edge, Firefox, Safari, Linux, mobile browsers, USB, Bluetooth, and third-party drivers. For Joystick Tester, treat that limit as part of joystick tester guidance rather than as a separate verdict.
A missing feature in the browser does not prove that the controller is damaged. Use the live readings as diagnostic hints and compare results across connection methods when possible. On this Joystick Tester page, compare that note with the live module that matches left stick and right stick X/Y movement, center offset, reach, circular range, and movement trail.
Joystick tester reading habits
A joystick tester should be read slowly. Push the stick to the edge, pause, return to center, and repeat the same motion in the opposite direction. The best joystick tester evidence is not a perfect looking circle; it is a repeatable pattern that explains why camera movement, aiming, steering, or menu navigation feels uneven.
If the joystick tester shows one side reaching less distance than the other, compare that result with deadzone and circularity checks before replacing hardware. Dirt around the stick collar, a worn spring, a driver curve, or a game response setting can all make the joystick tester result look worse or better than the real mechanical condition.
- Move one stick at a time during a joystick tester pass.
- Check center return before judging outer range.
- Repeat the joystick tester check after reconnecting the controller.