I write about gamepad hardware, controller diagnostics, and input optimization for PS5, PS4, PS3, Xbox, and Nintendo gamers. My main project is Pro Gamepad Tester, a free browser-based tool that reads raw input from any connected controller in real time. No download. No account. No cost. Use it to catch stick drift early, test trigger smoothness, confirm button reliability, or verify a repair. Everything runs locally in your browser with zero data sent anywhere.