Key Tester

Test every key on your Windows or Mac keyboard and every mouse / touchpad button in real time.

Windows Keyboard Key Tester

Click anywhere on this page and start pressing keys. They will light up here.

Esc
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
🔇
🔉
🔊
`
1
2
3
4
5
6
7
8
9
0
-
=
Backspace
Tab
Q
W
E
R
T
Y
U
I
O
P
[
]
\
Caps
A
S
D
F
G
H
J
K
L
;
'
Enter
Shift
Z
X
C
V
B
N
M
,
.
/
Shift
Fn
Ctrl
Win
Alt
Space
Alt
Win
Menu
Ctrl
PrtSc
ScrLk
Pause
Insert
Home
PgUp
Delete
End
PgDn
↑
←
↓
→
Num
/
*
-
7
8
9
+
4
5
6
1
2
3
Enter
0
.
Last key: None

Some OS-reserved keys (Fn, volume keys, etc.) may not be sent to the browser. For shared laptop keys, visual mapping is also shown for combinations like Shift+Insert → PrtSc.

How Key Tester of keyboard, mouse and touchpad web tool Works

Key Tester of keyboard, mouse and touchpad this web tool runs 100% inside your browser. It highlights keys, mouse buttons, and touchpad zones in real time so you can quickly see what is working and what is not.

Follow these simple steps:

  • 1️⃣ Open this page on your laptop or PC.
  • 2️⃣ Click once anywhere on the page to make sure the browser is active.
  • 3️⃣ Press any key on your Windows or Mac keyboard – the same key will light up on the on-screen keyboard.
  • 4️⃣ Move to the Mouse Tester section and click left, right, middle, and scroll – counters will increase live.
  • 5️⃣ Use the Touchpad Tester on laptops – one-finger tap, two-finger tap, and supported middle tap will highlight the zones.
  • 6️⃣ If a key or button does not highlight here, it may be a hardware, OS, or browser limitation.

You may freely use this tool to test your own keyboard, mouse, and touchpad. Do not use this tool to monitor, track, or record the activity of other people’s devices.

Note:

keytester.online is provided “as is” for quick testing and educational purposes. It may not detect every type of fault or compatibility problem. Do not use the results as the only basis for financial decisions such as buying, selling or repairing devices. You are responsible for how you use this tool.