WebSocket Tester

WebSocket Tester is a free online tool for testing WebSocket connections and real-time communication. Connect to WebSocket servers, send and receive messages, inspect frames, monitor connection states, and debug bidirectional communication protocols.

Built with native WebSocket APIs, this browser-based tool provides full WebSocket testing capabilities including connection management, message history, frame inspection, and protocol debugging without any installation required.

This tool simplifies WebSocket development and debugging. Quickly test WebSocket servers, validate message formats, debug connection issues, and monitor real-time data flows without writing client code or using command-line tools.

Perfect for backend developers, real-time application developers, game developers, and chat application engineers who need to test WebSocket servers, debug protocols, and validate bidirectional communication instantly.

WebSocket Development: Test WebSocket server implementations, validate message handling, and ensure proper connection lifecycle management.

Real-Time Debugging: Debug chat applications, live notifications, streaming data, and real-time collaboration features with message inspection.

Protocol Testing: Test custom WebSocket protocols, validate message formats, verify handshakes, and ensure proper error handling.

Performance Monitoring: Monitor connection stability, test reconnection logic, measure latency, and validate WebSocket behavior under various conditions.

Enter your WebSocket server URL (ws:// or wss://). Click 'Connect' to establish the WebSocket connection. The tool displays connection status and handshake details.

Send messages to the server using the message input field. All sent and received messages appear in real-time with timestamps. Inspect frames, monitor ping/pong heartbeats, and analyze the complete message history for debugging.