Problem solved

Computer users and gamers frequently encounter hardware problems such as unresponsive keys, stuck buttons, or erratic input behavior that can hinder productivity and gaming performance. This tool solves the problem by offering a quick, accessible, and free way to diagnose these issues online, eliminating the need for technical expertise or specialized software. It helps users identify whether a peripheral is faulty or if software is causing the problem, saving time and effort in troubleshooting.

Use cases

• Test all keys on a keyboard after building or modifying a custom mechanical keyboard to ensure proper soldering and switch function.
• Diagnose intermittent key failures or double-typing issues by monitoring real-time key press visualization.
• Check keyboard rollover and ghosting limits for gaming to verify simultaneous key press support.
• Verify mouse button functionality and scroll wheel performance after physical damage or wear.
• Test gamepad or joystick inputs for axis dead zones and button responsiveness before using in games.
• Quickly assess a used or second-hand peripheral before purchasing to avoid faulty hardware.

Audience

• Developers
• Hobbyists
• Enterprise

Pros

• Completely free and open source, allowing community contributions and audits.
• No installation required—works instantly in any modern browser.
• Supports a wide range of input devices, including keyboards, mice, and gamepads.
• Simple, intuitive interface suitable for all technical levels.
• Real-time visualization provides immediate feedback on peripheral status.

Cons

• Requires an active internet connection to access the tool.
• Limited to browser capabilities; cannot detect hardware-level faults like electronic shorts.
• May have inconsistent performance across different browsers or devices.