Keyboard Tester
Test every key on your keyboard: see which keys work, how many register at once and which ones double-type
- Not pressed yet
- Key works
- Held now
- Registered twice
Click the keyboard above, then press every key.
Last key
- Key value
- -
Results
Held now
Possible double typing
None so far.
Keys outside this layout
-
About Keyboard Tester
This page shows every key light up as you press it on a full-size keyboard, and keeps the keys that worked marked so you can see what is left.
It counts how many keys register at the same time, which tells you whether a gaming or typing combination will be lost.
It also flags keys that register twice in quick succession, the usual sign of a worn or dirty switch that double-types.
Key Features
- Full keyboard map: function keys, navigation block and numeric keypad, with Mac legends on a Mac.
- Works and held states: keys turn green once they work and blue while held.
- Rollover count: the most keys your keyboard reported at once during the test.
- Double-typing check: keys that fire twice within a few milliseconds are flagged in red.
- Key details: the key value, code, key code and position of the last key you pressed.
- Other keys: media, language and extra keys outside the standard layout are listed too.
How to Use
- Click the keyboard: the test area takes the keys from now on.
- Press every key: each one turns green when it works.
- Hold several at once: press a combination you use in games to see if all of them register.
- Look for red keys: they registered twice and may be wearing out.
- Leave the test area: press Esc three times quickly or click elsewhere on the page.
Common Use Cases
- New or used keyboard: check every key before the return window closes.
- Sticky or dead keys: find exactly which keys fail after a spill or a cleaning.
- Gaming setup: make sure your movement and ability keys all register together.
- Double letters while typing: confirm a chattering switch before replacing it.
- Laptop repair: test a replaced keyboard key by key.
Frequently Asked Questions
Why do some key combinations not register?
Many keyboards can only report a limited number of keys at once, and some combinations block each other (ghosting). The rollover count shows your keyboard’s real limit.
What does a red key mean?
The key registered a second press within 40 milliseconds of being released. That is faster than anyone types and usually means the switch is bouncing.
Why does Print Screen or a media key not light up?
Some keys are handled by the operating system before the browser sees them, and some send only a release. Those cannot be tested from any web page.
My keyboard is not US English. Does that matter?
No. Keys are matched by their physical position, so a German, French or Turkish keyboard is tested the same way; the legends on screen follow the US layout.
Is anything I type recorded?
No. Key presses are only shown on this page and are gone when you leave it.
How do I leave the test area with the keyboard?
Press Esc three times within a second, or click anywhere outside the keyboard picture.
Pro Tips
- Test Fn combinations too: brightness and volume keys often appear under Keys outside this layout.
- Try your game’s worst case: hold W, A, Shift and Space together and add one more key.
- Watch for red after cleaning: a switch that chatters right after a spill may recover once dry.
- Use the keycode finder for code: developers get every value of a single key there.
- Check your typing speed next: the typing test measures words per minute and accuracy.