Instantly intercept browsers, most backend & scripting languages (from Node.js to PHP), Android devices, Electron apps and more with one-click setup.
Collect interesting traffic without intercepting everything on your whole machine, so there's no extra noise and no side-effects - just the traffic you care about.
Inspect the full headers & body for every request & response from every client, to immediately see what's really being sent & received on the wire.
Easily understand collected HTTP traffic, with inline documentation for all standard headers & response statuses, plus body decoding, highlighting, folding, and other niceties, powered by the same internals as Visual Studio Code.
Send HTTP requests, with a fully featured HTTP client to send your own custom requests, or resend (and tweak) requests intercepted from other clients
Quickly find the data you care about, with exchanges highlighted by the type of client and tagged by category (images, JSON responses, errors), and free-text & structured filtering across all request & response data.
Breakpoint live requests or responses, to rewrite HTTP traffic on the fly.
Mock endpoints or servers, with flexible rule configurations to match and handle requests automatically, to send responses, inject failures & timeouts, or transparently redirect requests elsewhere.
Intercept any HTTP traffic: HTTP Toolkit is a transparent HTTP proxy, and can intercept plain HTTP, encrypted HTTPS, WebSockets, HTTP/2, proxy requests, direct requests, manually redirected packets, you name it, all on one port.