Free · works in your browser
Test every key on your keyboard
Click the keyboard below and press each key once. A key lights up when your browser receives it and stays marked as tested, so the ones that never light are easy to spot. The tester also checks for key chatter and shows how many keys you can hold at once. Nothing you press is saved or sent.
Not testing. Click the keyboard above to start, then press each key once.
Last key
- event.key
- none yet
- event.code
- none yet
Rollover
Held now: none
Hold several keys together and see where it stops.
Chatter check
- No chatter seen.
- The board is a full-size keyboard with 104keys and Windows labels. It tracks the key’s position, so on another language layout the key in that position lights up even if its letter differs.
- While the test area has focus, Space, the arrows, Tab, Page Up, Page Down, Home, End, Alt and F1 to F12 do not scroll or move focus, so they can be tested. Press Escape to release focus and use the page normally again. Keyboard users can also Tab to the area to start.
- You need a physical keyboard. A phone or tablet’s on-screen keyboard does not report real key codes.
Honest limits
What can a browser tester not see?
- Fn and some media keys. On most laptops Fn is handled by the keyboard itself, and many volume, brightness and media keys are handled by Windows or the keyboard before the browser hears them.
- Keys Windows takes first. Windows key shortcuts, Ctrl+Alt+Delete and the lock screen never reach a web page, and Print Screen may report only its release. Some browser shortcuts, such as Ctrl+W and F11, act before the page can stop them.
- Laptop keyboards. They usually have fewer keys, often no number pad, so the count will not reach 104. Test the keys you have.
- Ghosting. Whether a key goes missing when you hold several depends on how the keyboard is wired, not on this page. The rollover readout shows what your keyboard reports, nothing more.
Want to count presses over time instead of testing them? Try the free online keystroke counter. Curious how long a switch should last? See how long keyboard switches last.
How do I test my keyboard?
Click the keyboard on this page, then press every key once. Each key lights up when your browser receives it and stays marked as tested, so any key that stays dark needs a closer look. Press Escape when you finish to release the page's focus. Nothing you press is saved or sent.
Why does a key not register?
The switch may be dirty, worn or broken, or the keyboard may not be making contact. It can also be a key the browser never sees, such as Fn on most laptops, or one Windows handles first. Try the key in another app, check the cable or battery, and clean around the keycap.
What is key chatter?
Key chatter is one press registering twice, because a worn or dirty switch makes contact more than once within a few milliseconds. It shows up as doubled letters you did not type. This page flags a key that goes down twice within the gap you set, 30 milliseconds by default, and shows the gap.
What is n-key rollover?
N-key rollover means a keyboard can report many keys held at once, up to every key, without dropping any. Many keyboards report only six at a time. This page lists the keys you hold and the most held together. Whether a key goes missing depends on how the keyboard is wired, so test your own.
Tested today. Counted every day.
This page forgets everything when you close the tab. TypeCount starts with Windows, counts how many keys you press in almost every app, and keeps your days, hours and sessions on your PC.
Free for 30 days with everything included, then US$0.99 once (₹74 in India). No subscription.
Windows 10 (version 1809 or later) or Windows 11, 64-bit
Counts how many keys, never which. No account, no cloud, no network connections.