Keycode Info
Display keyboard keycodes and event information for key press debugging and development
Keycode Info
Display keyboard keycodes and event information for key press debugging and development
About Keycode Info Tool
Test keyboard events and display detailed keycode information for web development and debugging. Our tool captures key press events and shows keyCode, charCode, key values, and event properties - essential for building keyboard-driven applications and debugging input handling.
- Real-time keycode detection
- Event property display
- Cross-browser compatibility
- Special key recognition
- Modifier key detection
- Character code mapping
Frequently Asked Questions
What are JavaScript keycodes?
Keycodes are numeric values that represent specific keys on the keyboard in JavaScript events. They help identify which key was pressed and are essential for handling keyboard interactions in web applications.
How do I use this keycode tester?
Simply click in the testing area and press any key on your keyboard. The tool will instantly display the keycode, key name, character code, and other event properties for debugging purposes.
What's the difference between keyCode and which?
Both keyCode and which properties typically return the same numeric value for key identification. However, keyCode is deprecated in favor of the newer 'key' and 'code' properties for better cross-browser support.
Can I test special keys and modifiers?
Yes! The tool detects all keyboard keys including special keys (F1-F12, arrows, space, etc.) and modifier keys (Ctrl, Alt, Shift, Meta). It shows which modifiers are active during key presses.
Common Key Categories
Letters & Numbers:
- A-Z: 65-90
- 0-9: 48-57
- a-z: 97-122 (lowercase)
- Space: 32
Special Keys:
- Enter: 13
- Tab: 9
- Escape: 27
- Backspace: 8
- Delete: 46
Function Keys:
- F1-F12: 112-123
- Arrow Up: 38
- Arrow Down: 40
- Arrow Left: 37
- Arrow Right: 39