Open the tester
Click the “Test Your Keyboard” button and open the tester in your browser.
Free • Online • No installation
Keyboard Tester.
Test every key.
A professional, browser-based keyboard diagnostic tool for detecting broken keys, stuck inputs, rollover, chatter, and physical key codes — fast, accurate, and easy to use.
- 100% free
- No installation
- Works on all devices
Feature
Powerful Tests for Every Keyboard
From basic key checks to advanced diagnostics, Keyboard Tester helps you quickly identify issues and understand your keyboard’s behavior.
Your keyboard,
visualized.
Every physical key appears instantly below. Press one key or hold several together to inspect the exact signals reaching your browser.
Input monitor Live
EscF1F2F3F4F5F6F7F8F9F10F11F12
`1234567890-=Backspace
TabQWERTYUIOP[]\
CapsASDFGHJKL;'Enter
ShiftZXCVBNM,./Shift
CtrlWinAltSpaceAltWinMenuCtrl
CapsNumScroll
Num/*-789+456123Enter0.
Get started
How it works
Get started in seconds. No installation, no signup, just open and test.
Press any key
See the keys light up in real time and check the test results.
Check the results
Find issues, view key codes, and test advanced features.
Trusted by keyboard enthusiasts
What users say
Simple tools for quick checks, careful builds, and everyday troubleshooting.
★★★★★
“I quickly found out my spacebar was not working. Works perfectly in the browser.”
Keyboard tester user★★★★★
“Clean and easy to use. The rollover test helped me check my mechanical keyboard.”
Keyboard enthusiast★★★★★
“Simple, fast and accurate. I use it to check new keyboards before buying.”
Keyboard tester userFAQ
Frequently asked questions
Find quick answers to common questions about Keyboard Tester.
Is Keyboard Tester free to use?
Yes. The tester is free to use in your browser and does not require an account or installation.
Do I need to install any software?
No. Open the page, focus the tester, and press keys to see the browser receive them.
Will it work on my device?
It works on desktop and laptop browsers. Mobile testing requires a physical keyboard connected to the device.
What kinds of issues can it detect?
You can check missing keys, held inputs, rollover limits, chatter, and the physical key codes reported by your browser.
Is my keyboard data sent to a server?
No. Detection happens locally in your browser, and the tester does not upload or store your keyboard input.
Can I test gaming keyboards with multiple key rollover?
Yes. Hold several keys together and watch which inputs reach the browser at the same time. For a focused check, use the rollover tester.