Connection Control
disconnectedCommon Close Codes
| Code | Description |
|---|---|
| 1000 | Normal Closure |
| 1001 | Going Away (Browser navigating away or refresh) |
| 1002 | Protocol Error |
| 1003 | Unsupported Data |
| 1005 | No Status Received (Expected but missing) |
| 1006 | Abnormal Closure (Connection drop, no close frame) |
| 1009 | Message Too Big |
| 1011 | Internal Server Error |
About this Tool 🛠️
- Inspect WebSocket close frames in real-time.
- Displays close codes, reason strings, and clean/unclean shutdown status.
- Helps debug unexpected disconnects in production environments.
- Provides instant mapping of close codes to RFC descriptions.
- Useful for developers building chat apps, dashboards, or real-time systems.
Benefits of Using This Tool 🌟
- Quickly identify why a connection was terminated.
- Differentiate between client-side and server-side closures.
- Understand abnormal vs clean shutdown behavior.
- Improve production debugging workflow.
- Reduce guesswork when diagnosing connection drops.
Why Use This Tool? ✨
- WebSocket failures are often silent and hard to trace.
- Close codes provide critical insights into connection issues.
- Helps during load testing and failure simulations.
- Essential for real-time applications like chat or gaming.
- Improves reliability by understanding termination patterns.
How to Use This Tool? 📖
- Enter a valid WebSocket URL (wss:// recommended).
- Click “Connect” to establish a connection.
- Trigger a disconnect from client or server.
- Inspect the displayed close code and reason.
- Compare with the reference table to understand the cause.
Frequently Asked Questions (FAQs) ❓
- What is close code 1006? It indicates an abnormal closure without a proper close frame.
- What does "wasClean" mean? It tells whether the closing handshake completed successfully.
- Can I test custom close codes? Yes, use the disconnect function with custom codes.
- Does this tool simulate server errors? No, it only inspects actual connection behavior.
- Why do I see 1001 on refresh? Browsers send 1001 when navigating away from a page.