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WebSocket Tester

Connect to WebSockets and exchange messages

Disconnected
Message
Message History

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Technical reference

Test WebSocket connections locally in your browser. Send and receive messages, view timestamped message logs, and monitor connection status in real time. All operations run on the current page.

Core features

  • Connect to WebSocket servers with wss:// and ws:// protocol support.
  • Send text messages with Ctrl/Cmd+Enter shortcut.
  • Receive messages categorized by direction (sent/received/system) with timestamps.
  • Real-time connection status display (connected/connecting/disconnected).
  • Clear message logs and automatic cleanup on disconnect.

Example: usage flow

Connection, message sending, and receiving all happen in the browser. The WebSocket is automatically closed on disconnect or page unload.

text
1. Enter WebSocket URL (e.g., wss://echo.websocket.events)
2. Click Connect to establish connection
3. Type a message and press Ctrl+Enter to send
4. View received messages and system events

Limits

  • Custom HTTP headers and subprotocols are not supported.
  • Auto-reconnect and heartbeat (ping/pong) mechanisms are not available.
  • Binary messages show only size, not parsed content.
  • Message logs are not persisted and are lost on page refresh.

Frequently asked questions

Is wss:// encrypted connection supported?

Yes. wss:// uses TLS-encrypted WebSocket connections, while ws:// is plaintext. WSS is recommended for production environments.

Why does the connection fail?

Common causes include invalid URL format, server not running, CORS restrictions, or network proxy not supporting WebSocket. Check the URL and server status.