WebSocket Tools
Free browser-based tools for testing and debugging WebSocket connections.
Online WebSocket Tester
Connect to any WebSocket server, send messages, and inspect responses in real time. No installation required.
WebSocket Echo Server
Free echo server for testing. Send a message and get it back instantly. Use it to verify your client code.
Chrome Extension
Proxy, monitor, and modify WebSocket traffic on any website. Free and open source.
When to Use Each Tool
The Online WebSocket Tester is the quickest way to test a WebSocket connection. Enter a URL, connect, and start sending messages. You get timestamps, connection status, and message history right in the browser.
The Echo Server is useful when you are building a WebSocket client and need a server to test against. It echoes every message back, so you can verify your client sends and receives correctly without setting up your own backend.
The Chrome Extension goes deeper. It sits inside DevTools and lets you intercept, modify, and replay WebSocket messages on live websites. Use it for debugging production issues, security testing, or understanding how a third-party WebSocket API works.
Related Resources
- How to Test WebSocket Connections - testing strategies and approaches.
- WebSocket Testing Tools Comparison - overview of available tools.
- Testing WebSockets from the Command Line - curl, wscat, and websocat.
- What Is WebSocket? - protocol fundamentals.