What is Httptoolkit used for?

Httptoolkit is an open-source tool for debugging, testing and building with HTTP on Windows, Linux and Mac. It is a good fit for debugging HTTP traffic, testing HTTP(S) interactions and building with HTTP.

Is Httptoolkit open source?

Yes. Httptoolkit is open source. Its source code is on GitHub at httptoolkit/httptoolkit.

Yes. Httptoolkit is open source, so the software itself is free to use.

Can I self-host Httptoolkit?

Yes. Httptoolkit can be self-hosted on your own server or infrastructure.

What is Httptoolkit an alternative to?

Httptoolkit is an open-source alternative to Fiddler and Charles Proxy. Other open-source alternatives to Fiddler include Mitmproxy, Insomnia and Wireshark.

Is Httptoolkit actively maintained?

The most recent commit to Httptoolkit was on 4 February 2026. The project has 3.7k stars on GitHub.

Httptoolkit: open-source alternative to Fiddler

About Httptoolkit

HTTP Toolkit is an open-source tool for debugging, testing and building with HTTP on Windows, Linux and Mac. It allows users to intercept HTTP(S) traffic with one-click interception for a range of tools and platforms.

Users can precisely target interception to capture traffic from a single client, such as individual Android or iOS apps, entire devices, Docker containers, browser windows, or backend processes like Node.js, Java, Python or Ruby. Alternatively, any client can connect manually as an HTTP proxy.

Key features

Intercept HTTP(S) with one-click interception for a range of tools and platforms
Precisely target interception to capture traffic from a single client
Intercept individual Android or iOS apps, entire devices, Docker containers, browser windows, backend processes like Node.js, Java
Explore, search and examine traffic with content-type and source categorization and filtering tools
Examine URL, status, headers and body of each message with built-in parsing of parameters and explanations from MDN for standard headers
Use breakpoints to pause and edit live HTTP traffic

Good fit for

debugging HTTP traffic
testing HTTP(S) interactions
building with HTTP

Tags: http; debugging; testing; proxy; intercept; open-source

Httptoolkit: questions and answers

What is Httptoolkit used for?: Httptoolkit is an open-source tool for debugging, testing and building with HTTP on Windows, Linux and Mac. It is a good fit for debugging HTTP traffic, testing HTTP(S) interactions and building with HTTP.
Is Httptoolkit open source?: Yes. Httptoolkit is open source. Its source code is on GitHub at httptoolkit/httptoolkit.
Is Httptoolkit free?: Yes. Httptoolkit is open source, so the software itself is free to use.
Can I self-host Httptoolkit?: Yes. Httptoolkit can be self-hosted on your own server or infrastructure.
What is Httptoolkit an alternative to?: Httptoolkit is an open-source alternative to Fiddler and Charles Proxy. Other open-source alternatives to Fiddler include Mitmproxy, Insomnia and Wireshark.
Is Httptoolkit actively maintained?: The most recent commit to Httptoolkit was on 4 February 2026. The project has 3.7k stars on GitHub.