Why doesn't my controller show up?

Browsers hide controllers until you press a button on them, so connect it and press anything. If it still fails, try a wired connection; some pads need a mode switch for PC use.

How do I confirm stick drift?

Release both sticks and look at the dots: they should sit exactly on the crosshair center. A resting offset the game must constantly ignore is drift, and this diagram shows it more honestly than any game menu.

Instrument 06 · gamepad

Controller tester

Connect a pad and press any button. The diagram answers in real time, drift and all.

Connect a controller and press any button on it…

Test the rest of your setup

Keyboard tester Mouse test Mic test Sound test Webcam test Dead pixel test Monitor test Controller tester

How to read your results

Wiggle each stick in slow full circles: the dot should trace smoothly to the outer ring in every direction and snap back to dead center when released. A dot that rests off-center is drift in the making; a circle that flattens on one side is a worn sensor. Triggers should fill their bars smoothly from empty to full: jumps mean a dirty or failing potentiometer.

Common fixes

Stick drift: first try the vendor's recalibration, then compressed air under the stick boot. Persistent drift is a hardware module fault: replaceable on most modern pads for a few dollars in parts, or a warranty case.
A button needing force: membrane wear or debris. Opening and cleaning fixes most; it is usually a screwdriver job, not a replacement.
Pad connects but nothing registers in game: the game may want a different input mode (X-input vs D-input) or another controller occupies slot one. This page reads raw input, so if it works here the pad itself is fine.
Bluetooth lag or dropouts: test wired to separate radio problems from hardware ones; if wired is clean, the fault is interference, not the controller.