Realtime Browser Utility — 100% Private

Online Keyboard Tester Pro

Diagnose every key on your laptop, mechanical, membrane, or wireless keyboard instantly. Detect dead keys, switch chattering, and ghosting in real time.

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Last Key Pressed None
Key Value -
JS KeyCode -
Physical Code -
Press Latency 0 ms
Caps Lock
Num Lock
Scroll Lock
Shift
Ctrl
Alt
Press any key on your keyboard to begin testing...
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
Ctrl
⌘ Win
Alt
␣ Spacebar
Alt
⌘ Win
☰ Menu
Ctrl
Tested: 0 / 104 keys (0%)

Designed for Accuracy, Speed & Trust

⚡

Real-Time Visual Matrix

Instant keypress recognition with persistent checkmarks (✓) so you can track tested keys at a glance.

🔍

Deep Key Inspector

Inspect physical event.code, JavaScript key codes, press latency in ms, and active modifier flags.

🛡️

100% Client-Side Privacy

Processed locally inside your web browser. Keystrokes are never logged, stored, or sent to any server.

🎧

Audio & Combo Diagnostic

Synthesize mechanical audio feedback and test key combinations like Ctrl+C, Alt+Tab, and Win+Shift+S smoothly.

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How to Test Your Keyboard

Testing your keyboard takes less than 30 seconds:

  1. Press any physical key on your laptop or external keyboard.
  2. Watch the virtual keycap respond instantly on screen.
  3. Check for the blue checkmark (✓) indicating the key is fully functional.
  4. Observe the status indicators for Caps Lock, Num Lock, and Shift.
  5. Click "Export Report" to generate a diagnostic report for repair or warranty claims.

Frequently Asked Questions

If a key on your physical keyboard does not highlight on the virtual keyboard when pressed, the key switch, electrical trace, or ribbon cable may be broken or obstructed.
Yes! KeyTester Pro works seamlessly with built-in laptop keyboards (MacBook, Dell, Lenovo, HP, ASUS) as well as USB, Bluetooth, and 2.4GHz wireless mechanical keyboards.
No. Keystrokes are evaluated 100% locally inside your web browser. Zero keystroke data is ever sent to our servers.