Keyboard Tester

How to use this tester

Press keys on your keyboard and watch the on-screen keys highlight. The tool also shows the last key pressed and how many unique keys have been tested.

Tips for success

• Press each key once and watch for it to light up.
• Modifier keys like Shift, Ctrl, and Alt can be tested too.
• Some browser or system shortcuts may be intercepted by the OS.
• This tool is useful for laptops, desktop keyboards, and external USB keyboards.

Common mistakes

• Not clicking the page first. The browser only reads keystrokes once the page has focus. Click anywhere on the page, then start pressing keys.
• Blaming the keyboard for OS-intercepted keys. Brightness, screenshot, and some media keys never reach the browser. Test those through their normal OS function instead.
• Testing one key at a time. To catch ghosting or rollover limits, hold several keys together and watch which ones stop lighting up.
• Reading the printed letter, not the position. Highlights follow the physical key code, so alternative layouts still map correctly even if the printed letter differs.
• Skipping a text-editor cross-check. If a key fails here but types fine in a text editor, the fault is a remap or driver, not the switch.

FAQ

Why do some keys not appear?

Some keys or shortcuts may be captured by your browser or operating system before the page can read them.

Does this work on laptops?

Yes. It works on most laptop keyboards, external keyboards, and many wireless keyboards.

Can this detect intermittent key problems?

It can help identify keys that do not respond consistently, but intermittent hardware faults may require repeated testing.

Does this work with mechanical and gaming keyboards?

Yes. The tester detects any standard USB, Bluetooth, or laptop keyboard as long as the browser recognizes key presses. Mechanical, gaming, wireless, and split ergonomic keyboards all work. Keyboards that use proprietary drivers for macro or RGB features may have specific keys (usually the macro buttons) that don't register as standard keys, those won't highlight.

Can I test media keys, function keys, and modifier keys?

Most media keys (volume up/down, play/pause) and modifier keys (Ctrl, Shift, Alt, Cmd) are detected. Function keys F1 to F12 work on most keyboards. Some OS-level shortcuts (brightness, screenshot) are intercepted by the operating system before the browser sees them, those won't register in any web-based keyboard tester. If a key doesn't highlight, try it in a text editor first to rule out a driver issue.