WebSocket Tester
Test and debug WebSocket connections in real-time
WebSocket Configuration
Mixed Content Warning
You're trying to connect to an insecure WebSocket (ws://) from a secure page (https://). This will be blocked by modern browsers.
Solution: Use a secure WebSocket URL (wss://) instead, or test from an HTTP page.
Send Message
Connection Info
Quick Test Messages
Message History
When to Use WebSocket Tester
API Development
Test WebSocket APIs during development to verify connection handling, message formatting, and real-time communication before deployment.
Connection Debugging
Debug connection issues, troubleshoot handshake problems, and identify why WebSocket connections fail or disconnect unexpectedly.
Protocol Testing
Validate custom WebSocket protocols, test subprotocol negotiation, and ensure proper message handling across different implementations.
Real-time App Testing
Test chat applications, live updates, gaming platforms, and other real-time applications to ensure seamless bidirectional communication.
Performance Monitoring
Monitor message throughput, connection stability, and response times to optimize WebSocket server performance and reliability.
Integration Testing
Test WebSocket integrations with third-party services, validate cross-origin connections, and ensure compatibility across different environments.
Frequently Asked Questions
What is a WebSocket Tester?
A WebSocket Tester is a debugging tool that allows developers to establish WebSocket connections, send and receive messages, and monitor connection status in real-time. It helps test WebSocket APIs and troubleshoot connection issues without writing code.
How do I test a WebSocket connection?
To test a WebSocket connection: 1) Enter your WebSocket URL (ws:// or wss://), 2) Configure any custom headers or protocols if needed, 3) Click the Connect button, 4) Send test messages using the message input area, and 5) Monitor responses in the message history panel.
Can I test secure WebSocket connections (WSS)?
Yes, our WebSocket tester supports both secure (wss://) and non-secure (ws://) WebSocket connections. You can test any WebSocket endpoint that accepts connections from browsers, including SSL/TLS encrypted connections. Note: When accessing this tool over HTTPS, you must use secure WebSocket URLs (wss://) to avoid Mixed Content errors.
What are some free WebSocket test servers I can use?
We provide quick access to several free WebSocket echo servers: WebSocket.org (wss://echo.websocket.org/) - A reliable echo server for testing, Postman Echo (wss://ws.postman-echo.com/raw) - Postman's WebSocket testing service, and SocketsBay (wss://socketsbay.com/wss/v2/1/demo/) - Another testing endpoint. These servers echo back any messages you send, making them perfect for testing.
What is Mixed Content and how do I fix it?
Mixed Content occurs when you try to connect to an insecure WebSocket (ws://) from a secure page (https://). Modern browsers block this for security reasons. To fix this: 1) Use secure WebSocket URLs (wss://) instead of ws://, 2) Test from an HTTP page instead of HTTPS, or 3) Configure your WebSocket server to support SSL/TLS. Our tool will warn you when Mixed Content is detected.
Is this WebSocket tester free to use?
Yes, our WebSocket testing tool is completely free to use. There are no registration requirements, installation needs, or payment plans. You can test unlimited WebSocket connections directly in your browser without any restrictions.
What WebSocket protocols are supported?
Our tool supports standard WebSocket protocols including custom subprotocols. You can specify protocol headers and test various WebSocket implementations that follow RFC 6455 standards. Both text and binary message formats are supported.
How do I debug WebSocket connection issues?
To debug connection issues: 1) Check the connection status indicator, 2) Review the ready state information, 3) Examine sent/received message history, 4) Verify your WebSocket URL format is correct, 5) Ensure your server accepts cross-origin connections, and 6) Check for any custom header requirements.
Can I export my test results?
Yes, you can export your WebSocket testing session data. Use the Export button in the message history section to download a complete log of all sent and received messages, timestamps, and connection events for documentation or further analysis.
Are there keyboard shortcuts available?
Yes, we provide keyboard shortcuts for faster testing: Ctrl+Enter to send messages, Ctrl+D to disconnect, Ctrl+C to copy message history (when not in input fields), and Escape to clear the current message input.
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