Keyboard Tester

Test every key on your keyboard - perfect for mechanical keyboards and detecting faulty keys

Last Key: None
Key Code: -
Keys Pressed: 0
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
Shift
Z
X
C
V
B
N
M
,
.
/
Shift
Ctrl
⌘
Alt
Space
Alt
⌘
Ctrl
↑
←
↓
→
Not Pressed
Currently Pressed
Previously Pressed
Stuck (3+ seconds)

How to Use the Keyboard Tester

This keyboard test er helps you verify that every key on your keyboard is working correctly. It's especially useful when buying a used keyboard or testing a new mechanical keyboard.

Testing Process:

  1. Click anywhere on this page to focus the keyboard input
  2. Press each key on your physical keyboard
  3. Watch the virtual keyboard - keys turn green when pressed
  4. Previously pressed keys turn blue
  5. Keys held for 3+ seconds turn red (potential stuck key)
  6. Test modifier keys (Shift, Ctrl, Alt) with other keys

What to Check:

✓ Good Signs:

  • All keys register when pressed
  • Keys return to normal when released
  • No double registrations
  • Consistent key feel across keyboard

✗ Problems to Find:

  • Keys that don't register
  • Keys that register multiple times
  • Keys that stay "pressed" (stuck)
  • Inconsistent registration

Common Keyboard Issues:

Dead Keys

Keys that don't register at all. Common causes:

  • Damaged switch (mechanical keyboards)
  • Worn membrane (membrane keyboards)
  • Debris under the key
  • Circuit board damage

Chattering Keys

Keys that register multiple times with one press. Solutions:

  • Clean the switch with compressed air
  • Replace the switch (hot-swappable keyboards)
  • Adjust debounce time in software
  • Use contact cleaner for older keyboards

Stuck Keys

Keys that stay registered after release. Try:

  • Remove keycap and clean underneath
  • Check for sticky substances
  • Ensure keycap is properly seated
  • Test without the keycap installed

Keyboard Types & Testing Tips

Mechanical Keyboards

Individual switches for each key

  • • Test for consistent actuation force
  • • Listen for unusual sounds
  • • Check for smooth key travel
  • • Test stabilizers on larger keys

Membrane Keyboards

Rubber dome or scissor switches

  • • Check for mushy or unresponsive keys
  • • Test keys at edges and corners
  • • Press keys at different angles
  • • Look for worn areas

Gaming Keyboards

Often with anti-ghosting features

  • • Test multiple keys simultaneously
  • • Check WASD cluster thoroughly
  • • Test macro keys if present
  • • Verify RGB functionality

Laptop Keyboards

Low-profile integrated keyboards

  • • Test for flex or keyboard deck issues
  • • Check butterfly/scissor mechanisms
  • • Test function key combinations
  • • Verify backlight operation

More Input Device Tests

Controller Drift Test

Test game controller analog sticks

Touchscreen Test

Test touch response and multi-touch

Best Keyboards Guide

Top mechanical keyboard picks

Affiliate Disclosure: This page contains affiliate links. We may earn a commission if you purchase through these links at no additional cost to you. We only recommend products we've tested or believe will help with monitor testing.

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