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Keyboard Test
Press keys to see them light up, track recent presses, and verify your keyboard has no stuck keys.
Keyboard Test
Press keys to highlight them. Test all keys or check for stuck keys.
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Recent Keys
Press any key to begin…
How this test works
The tester listens to keydown and keyup events, maps them to the displayed layout, and highlights keys locally. Nothing is sent over the network.
- • Simultaneous key presses stay highlighted so you can check rollover.
- • Recent key list helps spot drops or repeats.
Troubleshooting
- • Click inside the tester once so the page has focus, then press keys again.
- • Confirm your OS keyboard layout matches the physical keyboard, especially for non-US layouts.
- • Disable game overlays or macros that may capture certain keys before the browser.
- • For wireless boards, replace batteries or try a wired connection to rule out dropouts.
- • Restart the browser after plugging in a new keyboard so it enumerates cleanly.
Quick steps
- • Press keys and watch them highlight; hold combinations like WASD or arrow keys to check rollover.
- • Use the recent key log to confirm the browser sees everything you type.
- • Test modifier combos (Ctrl/Alt/Shift) while pressing another key to verify shortcuts will work.
- • Hold a key to see repeat behavior; release to confirm it stops cleanly.
If keys do not register
- • Make sure the browser tab is active and the tester has focus.
- • Switch OS layout to match the printed legends; mismatches can shift key codes.
- • Turn off software that remaps keys temporarily and retry.
- • On laptops, disable function lock or try pressing Fn with the function row.
Check for sticky or repeating keys
- • Tap the key repeatedly to clear debris, then test again.
- • Unplug, gently clean around the keycap, and reseat the cable or receiver.
- • Lower key repeat rate in OS settings if repeats happen only while held.
- • If repeats appear immediately, the switch may be failing; consider repair or replacement.
Windows layout and accessibility checks
- • Settings > Time & language > Language & region: confirm the keyboard layout matches your hardware.
- • Settings > Accessibility > Keyboard: turn off Sticky Keys, Toggle Keys, and Filter Keys while testing.
- • Use Device Manager to look for driver issues; reinstall if a yellow warning appears.
macOS layout and accessibility checks
- • System Settings > Keyboard: set Input Sources to the layout you use and remove extras.
- • Toggle off Sticky Keys and Slow Keys under Accessibility > Keyboard during testing.
- • If Bluetooth keys lag, remove and re-add the device, then retry with the tester focused.
Gaming and NKRO tips
- • Use a wired connection to avoid wireless scan limits during heavy multi-key presses.
- • Try different browser tabs if anti-cheat extensions interfere with events.
- • If some combos fail, test again with Num Lock toggled; some boards share scan codes.
- • Lower USB polling rate temporarily if certain browsers drop events at very high rates.
Laptop-specific tips
- • Toggle the Fn lock to decide whether the top row acts as media keys or F1-F12.
- • If the trackpad blocks typing, disable palm rejection briefly while testing.
- • Close vendor keyboard utilities if they remap keys and hide events from the browser.
- • For 2-in-1 devices, rotate back to laptop mode so the keyboard sensor is enabled.
Mechanical keyboard care
- • Remove keycaps carefully and clear debris if a key sticks or binds.
- • Check hot-swap sockets for bent pins if an entire key is dead.
- • Update firmware if the board supports VIA/QMK and certain keys drop in browsers.
- • Test on another machine to separate hardware faults from driver conflicts.
When to use this test
- • Before gaming sessions where multiple keys are pressed at once.
- • After spills or when buying a used keyboard to verify every key responds.
- • When shortcuts fail and you want to see whether the browser receives the presses.
- • During remote support calls so you can describe exactly which keys fail.
Safety and privacy
- • Keystrokes stay in your browser and clear when you close the tab.
- • Use a private window if you prefer not to persist site permissions.
- • Avoid typing sensitive passwords while testing; use sample text instead.
Related tools
FAQ
Do you store keystrokes?
No. Key events are handled in the browser only and clear when you leave the page.
Can I test N-key rollover?
Yes. Hold multiple keys at once; the tester will keep them highlighted while pressed.
Why don't some keys appear?
Browsers block certain system keys and OS shortcuts may intercept function keys before they reach the page.
How do I test function and media keys?
Disable OS-level shortcuts temporarily and press the keys; many laptops require an Fn toggle to send them.
Does this work on tablets or phones?
Yes with external keyboards. On-screen keyboards often restrict events, so use a hardware keyboard for full results.
How do I test the numpad?
Turn Num Lock on, then press each numpad key and watch the highlights. If nothing lights, toggle Num Lock again and retry.