WebSocket Connection Tester

Connect to any WebSocket server, send messages, and inspect real-time responses. Test your WebSocket APIs directly in the browser.

Disconnected

Test servers:

Message Log JSON pretty-print

Connect to a WebSocket server to start logging messages.

Auto-ping every seconds (Sends "ping" message to keep connection alive)

About WebSockets

WebSockets provide a persistent, full-duplex communication channel over a single TCP connection. Unlike HTTP, the connection stays open so the server can push data to the client at any time.

WebSocket URLs use the ws:// (unencrypted) or wss:// (TLS-encrypted) scheme. Always use wss:// in production.

The echo servers above simply reflect any message you send back to you — useful for testing client-side code. Your own WebSocket server URL can be used too.