Press keys to highlight them in real-time. Supports multiple layouts, language keycaps, combo history, sound toggle, and reset.
Keys tested for current layout
A keyboard test detects and displays every key press in real-time, verifying that all keys—including function keys, modifiers like Ctrl and Alt, and special keys—work correctly. Essential for buying used keyboards, troubleshooting input issues, or testing new mechanical keyboards. This browser-based tester requires no installation and supports ANSI, ISO, and TKL layouts.
Our keyboard tester uses JavaScript keyboard event listeners to capture every key press and release in real-time. When you press a key, the browser fires keydown and keyup events that we detect and visualize on the virtual keyboard. We track key codes, modifier states (Shift, Ctrl, Alt), and key combinations. All processing happens locally in your browser—no key data is sent to any server, ensuring your typing remains completely private.
This browser-based test accurately detects most keys on standard keyboards. However, there are limitations: Some system keys (Print Screen, certain function keys) may be intercepted by the operating system before reaching the browser. Anti-ghosting limits vary by keyboard hardware. Media keys and special keys may not be fully supported. For testing system-level key bindings, consider native keyboard testing software.
Keys should highlight immediately when pressed and return to normal when released. Delayed or no response may indicate switch issues or browser compatibility problems.
If pressing multiple keys causes unexpected keys to register or some presses to be missed, your keyboard may have anti-ghosting limitations. Gaming keyboards typically handle this better.
Shift, Ctrl, Alt, and Cmd/Win keys should register and combine correctly with other keys. Issues here may indicate driver problems or hardware defects.
Common questions about key testing and layouts.
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Methodology: Our testing methodology uses standard Web APIs (KeyboardEvent) supported by all modern browsers. Tests are designed for accuracy and repeatability.
About: HardwareTest provides free, privacy-first hardware diagnostics. All tests run entirely in your browser with no data collection.
Disclaimer: This tool provides browser-based key detection. Some system keys may be intercepted by your operating system. For comprehensive keyboard testing, multiple browsers may be needed.
Tips for layouts, switches, and troubleshooting.
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