A keyboard tester drawn as a British ISO QWERTY board. Press any key and watch it light up.
UK QWERTY·ISO
Esc
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
PrtSc
ScrLk
Pause
F13
F14
F15
F16
F17
F18
F19
¬
`¦
!
1
"
2
£
3
$
4€
%
5
^
6
&
7
*
8
(
9
)
0
_
-
+
=
Backspace
Tab
Q
W
E
R
T
Y
U
I
O
P
{
[
}
]
Enter
Caps Lock
A
S
D
F
G
H
J
K
L
:
;
@
'
~
#
Shift
|
\
Z
X
C
V
B
N
M
<
,
>
.
?
/
Shift
Ctrl
Alt
Alt
Ctrl
Ins
fn
Home
Page
Up
Delete
End
Page
Down
Num
Lock
clear
=
/
*
-
7
8
9
+
-
4
5
6
+
1
2
3
Enter
0
.
| Position | US QWERTY | UK QWERTY |
|---|---|---|
| ` key | `~ | `¬¦ |
| 2 key (number row) | 2@ | 2" |
| 3 key (number row) | 3# | 3£ |
| 4 key (number row) | 4$ | 4$€ |
| ' key | '" | '@ |
| \ key | \| | #~ |
| Position | Keycap | event.code |
|---|---|---|
| Between left Shift and Z | \| | IntlBackslash |
The British layout keeps the QWERTY letter arrangement but moves a handful of symbols. Shift+2 gives a double quote, Shift+3 gives the pound sign, and the @ sits on the apostrophe key beside Enter. The board itself is ISO: Enter is a tall two-row key, the #/~ key sits to its left, and an extra \/| key lives between the left Shift and Z. That extra key is the one people most often miss when they test a UK board with a US picture.
Type across every row, including the number row with Shift held to check £, “ and ¬. Each key you press lights up and counts the presses, so a key that stays dark is dead and a key that counts two for one press has a chattering switch. Do not forget the ISO-only keys: the \ next to Shift and the # next to Enter are physically separate switches on a UK board.
Almost never. If Shift+3 gives # instead of £, Windows or macOS is set to the US layout. The switch still works; only the operating system’s mapping is wrong. This tester highlights the physical key, so it will light up correctly either way, and you can fix the mapping in your system’s language settings.