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WebSocket Testing

Route: /websockets

Open a full-duplex WebSocket connection and exchange messages in both directions.

Features​

  • Connect to ws:// and wss:// endpoints.
  • Send messages and watch responses arrive in real time.
  • Message history with direction (sent / received) and timestamps.
  • Connection status monitoring (connecting / open / closing / closed).

How it works​

The WebSocket connection is made directly from your browser using the native WebSocket API — no server proxy is involved. The remote server must allow the connection (and, for wss://, present a valid TLS certificate).

Using it​

  1. Open WebSockets from the sidebar.
  2. Enter a WebSocket URL (ws://localhost:8080 or wss://example.com/socket).
  3. Click Connect.
  4. Type a message and Send; replies appear in the history.
  5. Click Disconnect to close the socket.
  • SSE — for one-way server push.
  • WebTransport — for modern, low-latency transport.