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键码检测器
按键盘上的任意键获取详细的按键信息

Online Keycode Detector - Real-time Key Information & JavaScript Event Analysis Tool

Overview

The Online Keycode Detector is a powerful, free web-based tool designed for developers, educators, and anyone working with keyboard events. Get instant, accurate information about any key press including JavaScript keycodes, character encoding, key positions, and modifier states. Perfect for debugging keyboard events, learning web development, or building interactive applications.

Key Features

🚀 Real-time Detection

  • Instant key information display
  • Live event monitoring
  • Zero latency response

📊 Comprehensive Data

  • JavaScript keycode values
  • Character encoding information
  • Key position mapping
  • Modifier key states (Ctrl, Alt, Shift, Meta)
  • Event properties (keydown, keyup, keypress)

💻 Developer-Friendly

  • Copy-ready code snippets
  • Multiple data formats
  • Cross-browser compatibility
  • No installation required

🎯 Educational Tool

  • Perfect for learning keyboard events
  • Visual key mapping
  • Interactive demonstrations
  • Beginner-friendly interface

How to Use

Step 1: Access the Tool

Open your web browser and navigate to our Online Keycode Detector page.

Step 2: Press Any Key

Simply press any key on your keyboard that you want to analyze.

Step 3: View Results

The tool instantly displays comprehensive information about the pressed key:
  • JavaScript Keycode: The numeric keycode value
  • Character Encoding: Unicode and ASCII values
  • Key Position: Physical location on keyboard
  • Modifier States: Status of Ctrl, Alt, Shift, and Meta keys
  • Event Details: Complete event object properties

Step 4: Copy Information

Click any displayed value to copy it to your clipboard for use in your projects.

Use Cases

For Web Developers

  • Keyboard Event Handling: Debug and test keyboard event listeners
  • Game Development: Map keys for game controls
  • Accessibility: Implement keyboard navigation
  • Form Validation: Handle special key combinations

For Educators

  • Teaching JavaScript: Demonstrate event handling concepts
  • Interactive Lessons: Show real-time code execution
  • Student Projects: Provide reference tool for assignments

For General Users

  • Key Identification: Find specific key codes
  • Troubleshooting: Test keyboard functionality
  • Learning: Understand keyboard mechanics

Technical Specifications

Supported Events

  • keydown - Key press detection
  • keyup - Key release detection
  • keypress - Character input detection

Browser Compatibility

  • Chrome 60+
  • Firefox 55+
  • Safari 12+
  • Edge 79+
  • Mobile browsers supported

Data Accuracy

  • Real-time event capture
  • Cross-platform consistency
  • Standard-compliant values
  • No data collection or storage

Frequently Asked Questions

Q: Is this tool completely free?

A: Yes, our Online Keycode Detector is completely free to use with no registration required.

Q: Does it work on mobile devices?

A: Yes, the tool works on mobile devices, though some keys may behave differently than desktop keyboards.

Q: Can I use this for commercial projects?

A: Absolutely! Use the information gathered for any personal or commercial projects.

Q: Why are some keycodes different between browsers?

A: While most keycodes are standardized, some special keys may vary. Our tool shows the actual values your browser reports.

Q: How accurate is the key position information?

A: Key positions are based on standard keyboard layouts and may vary for specialized or international keyboards.

Privacy & Security

  • No Data Collection: We don't store or transmit any keystroke data
  • Client-Side Processing: All analysis happens in your browser
  • No Tracking: No cookies or analytics for key detection
  • Secure Connection: HTTPS encryption for all communications

Related Tools

Explore our other developer tools:
  • Character Encoding Converter
  • Unicode Inspector
  • ASCII Table Reference
  • Event Listener Debugger
Start detecting keycodes now! Press any key above to see instant, detailed information about your keyboard input. Perfect for developers, students, and anyone curious about how keyboards work with web applications.