Online Keyboard Tester

Press any key to test it. Every key lights up on the virtual keyboard. Quickly find broken or stuck keys.

Full Keyboard Real-time Detection Visual Feedback 100% Free
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Keys Tested
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Last Key Pressed
Press any key...
Esc
F1
F2
F3
F4
F5
F6
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F8
F9
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F11
F12
PrtSc
ScrLk
Pause
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Caps Lock
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D
F
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K
L
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'
Enter
Shift
Z
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Shift
Ctrl
Win
Alt
Space
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Win
Menu
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How It Works

Three simple steps to test your entire keyboard

1

Click This Page

Click anywhere on this page first to make sure it captures your key presses.

2

Press Every Key

Press each key on your keyboard. It will light up blue when pressed and turn green when tested.

3

Check Results

Any key that doesn't light up may be broken or stuck. The counter shows your testing progress.

Why Use ToolKnit Keyboard Tester?

Test Before You Buy

Buying a used keyboard? Test every key before paying. Make sure you're not getting a defective product.

Diagnose Stuck Keys

Find out exactly which keys are not registering. Great for troubleshooting mechanical keyboard issues.

No Installation Needed

Works directly in your browser. No software to download, no drivers to install. Just open and start testing.

Works With Any Keyboard

Mechanical, membrane, laptop, wireless, Bluetooth — any keyboard that connects to your computer.

Frequently Asked Questions

How does the keyboard tester work?
When you press a key on your physical keyboard, the browser sends a keyboard event. Our tool captures this event and highlights the corresponding key on the virtual keyboard. If a key lights up, it's working. If it doesn't, the key may be broken or stuck.
Why doesn't my key light up?
First, make sure you've clicked on this page so it has focus. Some keys like Print Screen, Fn, or media keys may be intercepted by your operating system before reaching the browser. If a regular letter/number key doesn't light up, it may be physically broken.
Does this work on laptops?
Yes! It works on any keyboard connected to your computer, including built-in laptop keyboards. Some laptop-specific keys (like Fn) may not be detectable by the browser, but all standard keys will work.
Is my data collected?
Absolutely not. Everything runs locally in your browser. No keystrokes are sent to any server. Your typing is never recorded, stored, or transmitted. It's 100% private.