Looking for a better alternative to Chrome's network devtools?
HTTP Toolkit is a supercharged alternative to Chrome's developer network tab, designed for faster debugging and deeper control of all your HTTP traffic.
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One-click setup integrations for every tool you use
HTTP Toolkit includes one-click automated setup to provide precisely targeted interception of individual browser windows, mobile apps, terminal sessions, Docker containers & more.
See all integrationsHTTP Toolkit has all the browser network debugging features you use today, plus:
Automatically capture all traffic from anywhere with one tool
Capture traffic from a single tab, an entire Chrome session, mobile browsers, and even your backend server, all in one place.
Extensible & automatable
100% open-source, with interception internals you can integrate directly into your own code to write automated tests or build custom proxies (available as an Apache-licensed open-source libraryopens in a new tab).
Fully featured body editor with advanced format support
Built on the same internals as VS Code, allowing you to explore, search and examine request & response bodies, with live editing, decoding & highlighting for JSON, Base64, Protobuf, CSS, HTML, XML, and more.
Built-in documentation
Documentation for every standard HTTP header and status code, plus specific endpoint docs & validation for 2600+ popular APIs, from Stripe to GitHub to AWS.
Powerful rules engine for rewriting & mocking HTTP traffic
Define custom rules that precisely match requests to automatically edit their contents, redirect them, simulate network errors, or breakpoint them for manual modification.
Advanced performance tools
Includes automatic caching & compression analysis, to explain how and why responses might (or might not) be cached in future, and automatically highlight errors and improvements from real-world traffic.
Capture
Intercept HTTP with zero setup
Capture HTTP(S) with zero hassle, with one-click interception for a huge range of tools and platforms.
Precisely target interception, to capture traffic from a single client without the noise & disruption of intercepting your entire computer.
Intercept individual Android or iOS apps, entire devices, Docker containers, browser windows, backend processes like Node.js, Java, Python or Ruby, terminal sessions...
Alternatively, just connect any client manually to HTTP Toolkit as an HTTP proxy, fully compatible with HTTP requests from anywhere.
inspect
Explore, search & examine HTTP
Hunt through traffic quickly & effectively, with content-type and source categorization, plus powerful filtering tools to precisely match the messages that matter.
Examine the URL, status, headers & body of each message, with built-in parsing of parameters, and explanations & docs from MDN for all standard headers.
Dig into message bodies with highlighting & autoformatting for JSON, Protobuf, Base64, HTML, XML, JS, hex and more, all built on top of Monaco - the editing tools from Visual Studio Code.
breakpoint
Pause & edit live HTTP traffic
Use breakpoints to pause in-flight HTTP traffic for manual editing.
Configure fine-grained matching logic to jump to exactly the cases you care about.
Redirect requests to another URL, update the method, headers or status, or edit the body.
Or get more involved and respond to requests without forwarding them, or even just hard-close connections directly.
Send
Send your own custom requests
Send your own requests directly, to explore APIs or test out different request parameters.
Use the fully featured HTTP client to define every aspect of your request, with automatic handling of details like body compression and message framing.
Explore sent requests & their responses with all the tools & power HTTP Toolkit offers for debugging intercepted traffic.
Pro Feature
Test with fully automated rewrite rules
Inject mock responses for prototyping and testing
Precisely match interesting requests, then define your own static response or map local files, to test clients against any endpoint behaviour you can imagine. Use it to override real responses, or even to simulate responses from endpoints or entire servers that don't exist yet.
Build, curate & share rulesets
Create rules in one click from intercepted traffic, tune to perfection, then use rule groups & custom aliases to quickly organize rules and toggle behaviours. Once they're perfect, export rules to share with your team or store as your own private library.
Transform, redirect & inject errors
Redirect production sites to local test servers, or block requests with connection resets, timeouts & failing status codes. Want a real response from a target server, but different? Dynamically transform requests or response to inject headers (goodbye CORS errors), match/replace body content, patch JSON bodies, and more.
TESTIMONIALS
Join 686,087 developers
Why HTTP Toolkit?
Numbers that speak for themselves:
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years of development
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users around the world
open-source contributors
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GitHub stars across httptoolkit's repos