knock

Intercept, modify, or pause fetch/XHR in any page. Rule-based response overrides, cookie injection, and in-page live editing.

knock — drive the browser directly from Chrome DevTools 📖 Docs, screenshots, live demos: https://knock.racgoo.com A DevTools panel that drives the browser end-to-end. Intercept every fetch and XMLHttpRequest, rewrite them on the fly with rule pipelines, pause a request and hand-edit it in a floating in-page editor, or record click / fill / submit flows and replay them deterministically — all from one panel. Runs entirely in your browser. No account, no telemetry, no server. — Capture every fetch / XHR with method, URL, status, headers, body. Detail pane shows the post-modify state. — Rule pipelines rewrite outgoing requests (headers / query / body / cookies — Override or Replace) and synthesize responses (status / headers / body / delay / Set-Cookies). Rules run in order. — Pause either side and edit live in a draggable in-page editor. — Record click / fill / submit / wait flows in the Automation tab. Replay deterministically against captured network, or fire live against the real backend for auto-login / repeat-task helpers. — Real cookies through chrome.cookies — actual jar state, not a fake header. — Rule Sets bundle rules with domain allowlists. Export / import as JSON. → Get started: https://knock.racgoo.com/docs/getting-started