// the find
law-chain-hot/websocket-devtools
Complete WebSocket Traffic Control with advanced proxy, simulation, and blocking capabilities
A Chrome/Edge DevTools extension for intercepting and manipulating WebSocket traffic. It lets you monitor live connections, inject messages in either direction, and block specific messages — the kind of thing you normally reach for Burp Suite or a custom proxy to do. Aimed at developers debugging real-time apps or games.
Background monitoring that catches connections established before DevTools opens — this is the detail that actually matters and most similar tools get wrong. Bidirectional message injection works for both client→server and server→client simulation, which covers the awkward case of testing server-push behavior without touching the server. Iframe WebSocket support is handled through a proper content script proxy, not an afterthought. MIT licensed, no telemetry, all state in local storage — nothing phoning home.
No binary/protocol buffer support beyond what protobufUtils.js hints at — if your sockets carry anything other than JSON or plain text, you're mostly on your own. The project is at v1.0.6 with 56 forks and no visible contributor graph beyond the original author, so bus factor is one. No replay or scripting capability — you can send a saved favorite but you can't script a sequence of messages with timing, which is what you'd want for load or integration testing. Chrome/Edge only; no Firefox, no programmatic API for use in CI.