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Joystick Test
A guided check for analog sticks, different from watching live values: keep your hands off for a five-second drift measurement, then sweep the rim to map each direction's reach. Scored results per stick, computed entirely on this page.
No controller detected yet. Connect a gamepad, then press any button on it so the browser reveals it. Idle drift needs a real stick — a mouse or keyboard cannot substitute.
Pick a stick, keep the controller still, then run a check.
1 · Idle drift check
Measures how far the reported stick position sits from center while you are not touching it. A healthy stick reads near zero; a worn potentiometer never fully returns.
Run the check to see mean and worst offset for the left stick.
2 · Range & circularity sweep
Rotate the stick slowly around the outer edge a few times. Each direction's furthest reach is recorded, then compared: a round, full sweep scores near 100%, while a worn stick leaves flat spots or directions it cannot reach.
Run a sweep to see per-direction reach and the circularity score.
Recorded traces
Left: idle samples around center (zoomed in, rings at 3% and 8% offset). Right: how much of the full range your sweep covered — spokes mark each direction's furthest reach.
Guide
How to check a stick
FAQ
Joystick test questions
What is stick drift?
Drift is when a controller reports stick movement while you are not touching it — the game character creeps or the cursor wanders on its own. It usually comes from a worn potentiometer or dust under the stick module, so the resting reading never quite returns to zero.
How does the drift check work?
You keep your hands off the controller for five seconds while the page records raw stick positions. It then reports the mean and worst distance from center: under 3% is typically unnoticeable, 3–8% can be felt in sensitive games, and above 8% is real drift. It is an observation of what your browser receives, not a hardware certification.
What does the circularity score mean?
After you sweep the stick around its rim, the page compares the furthest reach in 24 directions. A healthy stick reaches a similar distance everywhere and scores near 100%. Flat spots, gaps (low coverage) or one short cardinal direction hint at wear, a stick gate, or intentional hardware shaping — compare left and right sticks against each other.
Can this tool recalibrate or fix my stick?
No, and any page claiming to fix hardware from the browser is overstating what the Gamepad API can do. This test measures what the browser receives. For recalibration look at your console's settings, your controller vendor's software, or the stick module itself.
Which controllers can I test?
Any controller your browser detects over USB or Bluetooth — Xbox, PlayStation, Switch Pro and generic PC pads all expose analog sticks. The stick tests need a controller that reports standard axes; if it does not, the page tells you rather than showing invented numbers.
Why do results differ from how the game feels?
Games add their own deadzones, response curves and smoothing on top of the raw values this page shows. A slight browser-reported drift can disappear in a game with a 15% deadzone — and vice versa, a stick that passes here can still feel off in a game using raw input.