Sound Visualizer
Record your typing sound and visualize the waveform in real-time
Key Chattering Detector
Detects double-input from faulty mechanical key switches (<50ms interval)
No chattering detected. Type normally to monitor.
Online Keyboard Tester & Key Rollover Check
How to Test Your Keyboard
- Select Your Layout: Use the toggle above to switch between Windows and Mac layouts.
- Press Every Key: Type naturally or slide across rows. Working keys will turn Green.
- Check Function Keys: Don't forget F1-F12, Esc, and specialized keys like Print Screen.
- Reset: Click "Reset Test" to clear the history and start over.
Troubleshooting Common Issues
- Ghosting: If multiple keys don't register when pressed simultaneously, your keyboard might lack N-Key Rollover (NKRO).
- Chattering (Double Typing): If a single press registers twice, the switch might be dirty or failing.
- Wrong Key? If a key registers as a different one, check your OS language settings.
๐ฅ๏ธ Remote Desktop Keyboard Mapping (Mac โ Windows)
When connecting from a Mac to Windows PC via Google Chrome Remote Desktop, keyboard layout differences can cause issues. Here's how to fix them:
translate 1. Korean/English Toggle Mapping
Mac uses Caps Lock or Ctrl+Space for language switching, which doesn't work properly in a Windows remote session.
Solution:
- On Windows remote PC: Go to Settings โ Time & Language โ Language & Region
- Set keyboard layout to "Korean Keyboard (101 Key) Type 1"
- In Chrome Remote Desktop sidebar โ Configure Keyboard Shortcuts
- Map your preferred Mac key to Windows Right Alt (ํ/์ key)
keyboard_command_key 2. Control Key & Shortcut Mapping
Mac users expect โ Cmd+C/V for copy/paste, but Windows uses Ctrl+C/V.
Solution:
- Open Chrome Remote Desktop sidebar menu (right edge)
- Select "Configure Keyboard Shortcuts"
- Add mapping:
MetaLeft(โ Command) โControlLeft(Ctrl)
lightbulb Pro Tip
For more advanced key remapping, consider using PowerToys Keyboard Manager on Windows or Karabiner-Elements on Mac. Karabiner lets you create profiles that activate only during remote sessions.
What is Key Rollover?
Gamers and fast typists need reliable input.
- 6KRO (Standard): Most office keyboards can only register 6 keys at once.
- NKRO (N-Key Rollover): Gaming keyboards can register unlimited simultaneous presses. Try mashing both palms on the keys to test this!
security Safe & Secure
Your keystrokes are 100% private. This test runs entirely in your browser using JavaScript. No keylogging, no server uploads.