Keyboard Tester

Press keys to see them light up and watch how many register simultaneously. Useful for spotting dead keys and measuring key rollover (NKRO) on a new or worn board.

Press keys to see them light up. Handy for checking key rollover (how many keys register at once) and spotting dead keys. The counter below shows how many keys are held simultaneously.

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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
Ctrl
Win
Alt
Alt
Fn
Menu
Ctrl
Keys held: 0 (higher = better rollover / NKRO)

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