How to test what key on a keyboard is being pressed
When troubleshooting keyboard problems, you may need to determine if, when keys on the keyboard are being pressed, the computer is recognizing those keys. Below are some web pages and programs that help test the keys on a computer keyboard.
If no keys on your keyboard are working, see: Why don't any keys on my keyboard work?
JavaScript key event test script
The JavaScript key event test script is a script that tests keypress events. This test can include all keyup and keydown events, and can include modifier keys.
Windows on-screen keyboard
The Windows on-screen keyboard is a program included in Windows that shows an on-screen keyboard to test modifier keys and other special keys. For example, when pressing the Alt, Ctrl, or Shift key, the On-Screen Keyboard highlights the keys as pressed. Unfortunately, this program does not highlight any of the letter keys as they are pressed.
Passmark KeyboardTest
The Passkmark KeyboardTest is a Windows program that tests the keys pressed on the keyboard with different keyboard layouts.