GamepadTester.site is a really handy website for checking if your controller works properly. You don’t need to download anything — just plug in your gamepad, open the site, and press the buttons. It shows every input in real time, including joysticks and triggers. It’s great for spotting problems like joystick drift or buttons that don’t respond, and it works on most devices since it runs in the browser. The design is clean, fast, and easy to use. Overall, it’s a simple but super useful tool for any gamer.