WebSocket Tester - Test WebSocket Online

Connect and test WebSocket server directly in the browser

Connect

disconnected

Send a message

Sample WebSocket servers:

Messages ({messages.length})

Not yet any messages

WebSocket Tester Online - Test & Debug WebSocket Connection Free

Tan Phat Digital's online WebSocket Tester is a professional tool that helps developers test and debug WebSocket connections directly in the browser. With an intuitive interface, you can connect to any WebSocket server (ws:// or wss://), send messages and receive realtime responses. The tool displays full message history with timestamps, clearly distinguishing between sent/received/system messages. Built-in sample WebSocket servers such as Echo Server and Postman Echo for immediate testing without needing to setup a backend. All processing is client-side, ensuring the security of your data. Completely free, no registration required.

Outstanding features

Connect to any WebSocket server (ws:// and wss://)
Send and receive realtime messages with low latency
Display connection status: connected, connected, disconnected
Log full message history with exact timestamps
Clearly distinguish sent messages, received messages, system events
Sample WebSocket servers are built-in for quick testing
Copy entire message history with one click
Responsive interface, works well on mobile
No installation required - runs directly in the browser
Completely free, unlimited connections

Why is WebSocket Tester important for Realtime Development?

WebSocket is the foundational protocol for modern realtime applications such as chat applications, live notifications, collaborative editing, gaming, and financial trading platforms. Unlike traditional HTTP request-response, WebSocket maintains a persistent connection allowing two-way communication with extremely low latency. However, debugging WebSocket is more complicated than REST APIs because it needs to maintain connection state and handle multiple message types. WebSocket Tester solves this problem by providing an intuitive testing environment. You can verify server connection, test message formats (JSON, plain text, binary), debug connection drops, and validate server responses - all without writing a single line of code.

Benefits when used

  • •Debug WebSocket server quickly without writing test code
  • •Verify connection handshake and authentication flow
  • •Test message formats before implementing into production code
  • •Check connection stability and reconnection logic
  • •Monitor realtime message flow to debug timing issues
  • •Validate server responses and error handling
  • •Test with multiple message types: JSON, plain text, formatted data
  • •Share test results with the team by copying message history

Detailed instructions for using WebSocket Tester

  1. 1Enter the WebSocket URL in the Endpoint box. The URL must start with ws:// (unencrypted) or wss:// (SSL encrypted). You can click on sample servers to quickly test
  2. 2Press the
  3. 3button to open the WebSocket connection. The status will change from
  4. 4 sang
  5. 5then
  6. 6if successful
  7. 7Once connected, enter message in the box
  8. 8. Can send plain text or JSON formatted string
  9. 9Click
  10. 10to send messages. The message will appear in the Messages panel with the label
  11. 11and timestamp
  12. 12Responses from the server will automatically display with the label
  13. 13. System events such as connect/disconnect are also logged
  14. 14Use the Copy button to copy the entire message history. Click
  15. 15when testing is completed

Cooperate immediately with Mavis Digital

We not only design websites, but also help businesses build strong digital brands. Providing comprehensive website design services from design to SEO optimization. Please contact Mavis Digital immediately to create breakthrough, effective and sustainable technology solutions for your business in Ho Chi Minh.

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