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Keyboard tester

Mac keyboard tester and Windows keyboard test online

Open the tester and press any key to check real-time input. The page auto-opens the Mac layout on macOS and the Windows layout on Windows, with support for modifiers, arrows, numpad keys, Fn where browsers report it, mouse clicks, and mechanical keyboard checks.

Real-time key test Auto Mac/Windows layout Fn + modifier checks Mechanical switch testing
Tested 0
Idle Tested Active
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 Lock
A
S
D
F
G
H
J
K
L
; :
' "
Enter
Left Shift
Z
X
C
V
B
N
M
, <
. >
/ ?
Right Shift
Ctrl
Win
Alt
Space
Alt
Win
Menu
Ctrl
PrtSc
ScrLk
Pause
Insert
Home
PgUp
Delete
End
PgDn
Up
Left
Down
Right
Num
/
*
-
7
8
9
+
4
5
6
1
2
3
Enter
0
.
Left Click
Wheel Click
Right Click
Keyboard check online

Choose the right keyboard layout for your test

Use the tester for Mac, Windows, laptop, and mechanical keyboard checks without installing a separate app.

Mac keyboard tester

On macOS, the tester opens the Mac layout automatically so Command, Option, Control, Return, Delete, arrow keys, and supported Fn events are easier to recognize while testing.

Windows keyboard tester

On Windows and Windows 10 devices, the tester opens the Windows layout with Ctrl, Alt, Win, Menu, function keys, navigation keys, arrows, and numpad keys visible in one view.

Fn and mechanical key checks

Use the live highlight to test sticky keys, missed switches, arrows, mouse clicks, numpad input, and mechanical keyboard keys. Some laptop Fn keys are hardware-level and may not be reported by the browser.

Helpful guide

How to use Keyboard Tester

Test every key online with Mac and Windows layouts, Fn key checks, arrows, numpad keys, mouse clicks, and mechanical keyboard switch testing.

How to use

  1. Open Keyboard Tester and let the page choose the Mac or Windows layout for your current device.
  2. Press each key you want to test, including letters, arrows, function keys, modifiers, numpad keys, and mouse buttons.
  3. Watch the on-screen key highlight, tested-key counter, lock indicators, and input log to confirm the browser received the event.
  4. Switch layouts manually if you are checking another keyboard, then use Reset Test before starting a new pass.

Key features

  • Automatic Mac or Windows layout selection based on the visitor browser platform.
  • Live testing for letter keys, arrows, function keys, modifiers, numpad keys, and mouse clicks.
  • Useful for laptop Fn checks and mechanical keyboard switch testing when the browser reports the key event.

Benefits

  • Check a Mac, Windows, laptop, or mechanical keyboard directly in the browser.
  • See missed, stuck, or repeated key events without installing keyboard diagnostic software.
  • Use layout-specific labels for Command, Option, Win, Ctrl, arrows, Return, Delete, and numpad keys.

Common use cases

  • Run a Mac keyboard tester check after a key, Command shortcut, or arrow key stops responding.
  • Test a Windows 10 keyboard, external USB keyboard, or laptop keyboard before replacing hardware.
  • Check mechanical keyboard switches, numpad input, mouse buttons, and modifier combinations in real time.

About this tool

Keyboard Tester is an online Mac and Windows keyboard checker for real-time key testing. It helps verify normal keys, Fn where browsers expose it, arrows, numpad keys, mouse clicks, and mechanical keyboard switches without installing a separate diagnostic app.

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Keyboard Tester FAQ

Quick answers for common questions before you use the tool.

Can I use this as a Mac keyboard tester?
Yes. On macOS, Keyboard Tester opens the Mac layout automatically and shows Mac-style labels for Command, Option, Control, Return, Delete, arrows, and supported Fn key events.
Can I test a Windows or Windows 10 keyboard?
Yes. On Windows devices, the page opens the Windows keyboard layout with Ctrl, Alt, Win, Menu, function keys, arrow keys, navigation keys, and numpad keys.
Does the keyboard tester work with the Fn key?
It can highlight Fn when the browser receives a key event for it. Some laptops handle Fn at the hardware or firmware level, so the browser may not report that key even when it works on the device.
Can I test a mechanical keyboard online?
Yes. Press each switch and watch for live highlighting, the tested-key count, and the input log. This is useful for spotting missed, stuck, repeated, or non-reporting keys.