Keyboard Test
Press a key and it lights up on the on-screen keyboard. Find keys that do not respond, keys that register twice from one press, and how many the board reads at once (N-key rollover) — all in the browser.
🔧 Runs in the browser. Nothing to install, nothing uploaded.
Esc
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
`
1
2
3
4
5
6
7
8
9
0
-
=
⌫
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
Space
Lang
Alt
☰
Ctrl
Ins
Home
PgUp
Del
End
PgDn
↑
←
↓
→
Press any key. Blue means held right now; pale blue means it registered at least once.
0
Keys registered
0
Max simultaneous
0
Held now
Recent input
Nothing pressed yet.
What this test checks
- Whether each key registers
- The key code pressed (KeyboardEvent.code)
- Maximum simultaneous keys
- Which keys you have not tried yet
Other device tests
Results depend on your browser and drivers. If something looks wrong here, try the same test in another browser before assuming the hardware is at fault.