USB Keyboard Tester

The essential diagnostic tool for every USB peripheral!
USB Keyboard Tester is a powerful and easy-to-use application designed to help you verify the functionality of external input devices on your Android smartphone or tablet. Whether you are troubleshooting a mechanical keyboard, checking a new mouse, or testing OTG compatibility, this app provides the precise feedback you need.
Why use USB Keyboard Tester?
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Comprehensive Key Mapping: Test every single key on your external keyboard. From standard Alphanumerics to Function keys (F1-F12), Modifiers (Ctrl, Alt, Shift), and System keys (Esc, Tab, Home).
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Integrated Mouse Diagnostics: Although named Keyboard Tester, it includes a full suite to test Mouse clicks (Left, Right, Middle), Scroll Wheel movement, and tracking accuracy.
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OTG & Hardware Verification: Instantly detect if your Android device supports USB Host mode and if your hardware is being recognized correctly by the system.
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Save & Export Reports: Encountering a "ghosting" issue or a dead key? Generate a detailed text-based diagnostic report and save it to your device to share with manufacturers or support teams.
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Clean & Responsive UI: Designed with Material Design 3 for a modern look that adapts to your system's Light or Dark theme.
Simple to use:
1.
Connect your keyboard or mouse via an OTG (On-The-Go) cable/adapter.
2.
Open the app and begin typing or clicking.
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Watch the real-time visualizer highlight every successful input.
4.
Save your results for future reference.
Disclaimer: Requires USB Host (OTG) support on your Android device. This app is designed for hardware testing; some system-level keys (like the Home button or Power button) may be intercepted by the Android OS before reaching the app.