A tool for complete WebSocket traffic control

In plain words

This Chrome extension acts as a WebSocket proxy integrated into DevTools, enabling developers to monitor real-time WebSocket traffic, send custom messages in both directions, and block messages for testing. It captures connections even when DevTools is closed and allows inspection of WebSocket communication without external tools. Built with React and Vite, it's designed for developers debugging WebSocket applications, testing error scenarios, and reverse-engineering APIs.

written from the facts on this page · September 2026

From the sources

Professional WebSocket debugging tool with message proxying, simulation, blocking and favorites features

Complete WebSocket traffic control with our Chrome extension. Proxy, simulate, and block WebSocket messages with advanced debugging capabilities. Real-time monitoring and traffic control for developers.

Take full control of WebSocket traffic with advanced proxy, simulation, and blocking capabilities. - WebSocket DevTools Everything you need to debug, test, and monitor WebSocket connections in your applications. Get a preview of the extension interface and key features in Chrome DevTools. Complete WebSocket debugging interface with active monitoring panel, message control toggles, live connection tracking, and real-time message traffic display with JSON formatting and timestamps. Advanced message simulation with JSON editor, syntax highlighting, and nested parse & fill options. Create custom WebSocket messages easily. Powerful message blocking functionality with real-time interception.…from websocket-devtools.com

In the maker’s words, at launch

I built a Chrome extension that acts as a WebSocket proxy, allowing real-time monitoring, message simulation, and traffic interception. Think "Proxyman for WebSockets" but integrated into Chrome DevTools. Key features: Real-time WebSocket monitoring and message capture Send custom messages in both directions (client…

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