A tool for complete WebSocket traffic control
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 ↔ server) Block incoming/outgoing messages for testing Background monitoring (captures connections even when DevTools is closed) Why: I was debugging a WebSocket chat app and needed better tools than browser DevTools. Existing solutions required external proxies or were too…
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
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 ↔ server) Block incoming/outgoing messages for testing Background monitoring (captures connections even when DevTools is closed) Why: I was debugging a WebSocket chat app and needed better tools than browser DevTools. Existing solutions required external proxies or were too basic. Tech: Injects proxy script to intercept WebSocket constructor, React + Vite UI, Chrome DevTools API integration, MIT licensed. Perfect for debugging WebSocket apps, testing error scenarios, reverse engineering APIs, and QA testing real-time features. Links: GitHub: https://github.com/law-chain-hot/websocket-devtools YouTube Demo: https://www.youtube.com/watch?v=L64x__1xORQ Would love feedback from developers who work with WebSockets regularly!
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