How browser-based hardware testing works
Modern browsers give web pages direct, read-only access to the same input data games use. The Gamepad API reports every button and stick axis of a connected controller; keyboard events report the physical key code and a high-resolution timestamp; pointer events report each mouse movement, click and scroll. ControllerTests reads that data, measures it precisely and turns it into a plain-language result — for example “left stick rests 12% off-center: mild drift”.
Because everything happens on your device, results are instant and private. If a test points to a hardware fault, each page explains what the numbers mean, what you can try first and when a repair or warranty claim makes sense.
Which controller test should I run?
- Buttons not responding, or a stuck trigger: start with the controller tester and press every input until the checklist is complete.
- Character or camera moves on its own: run the stick drift test for a graded verdict and a suggested dead zone.
- A specific pad: the PS5 DualSense, Xbox and Switch Pro / Joy-Con pages add pairing steps, model-specific limits and fixes.
- Keyboard or mouse problems: the keyboard tester, chattering test, mouse tester and double-click test isolate the faulty key or switch.