Open Source Fiddler Alternatives
The best open source alternative to Fiddler is Wireshark. If that doesn't suit you, our users have ranked more than 25 alternatives to Fiddler and 14 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Fiddler are mitmproxy, OWASP Zed Attack Proxy (ZAP), HTTP Toolkit and Stoplight.
Fiddler alternatives are mainly Web Debuggers but may also be HTTP(S) Debuggers or HTTP Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Fiddler.
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.
Wireshark vs Fiddler opinions
Wireshark is a packet analyzer, not an alternative to debugging proxy like Fiddler or MITM are.
mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP. It provides a console interface that allows traffic flows to be inspected and edited on the fly.
mitmproxy vs Fiddler opinions
mitmproxy is free and well featured, but fiddler does have an easier workflow to start with
It's able to analyze http requests made by other proxies, many other of the alternatives here only allow creating requests
mitmproxy is able to edit response data
The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications.
OWASP Zed Attack Proxy (ZAP) vs Fiddler opinions
ZAP is a proxy for attacks, not a proxy for development
- Freemium • Open Source
- Mac
- Windows
- Linux
- Online
HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools from Docker to Android to GraphQL.
Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality, all with an easy, enjoyable developer experience.
NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows. NetworkMiner can parse PCAP files and regenerate/reassemble transmitted files and certificates from PCAP files with HTTP, FTP, SMB, SMB2, TFTP and several other protocols.
- Free • Open Source
- Mac
- Windows
- Linux
- Chrome OS
- Google Chrome
- Chromium
- Chrome Web Store
API testing tool. Which allows web developers to create and test custom HTTP requests.
Advanced REST Client (ARC) vs Fiddler opinions
Fiddler is a Proxy tool used to intercept and examine HTTP requests not to create an test HTTP requests.
HttpRequester is a tool for Firefox for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.
Discontinued
Doesn't support Firefox WebExtensions:https://github.com/tommut/HttpRequester/issues/43Also latest commit d62a6ea on Mar 12, 2017.
- Free • Open Source
- Mac
- Windows
- Linux
- React
- Electron / Atom Shell
- Node.JS
James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from the browser. It is an open-source alternative to the popular developer tool Charles.
Discontinued
Not sure if 'discontinued' is quite right, but James has now officially moved in 'maintenance mode', with little or no ongoing development or support. See the readme: https://github.com/james-proxy/james#this-project-is-in-maintenance-mode.It would be helpful to highlight that here imo.
- Free • Open Source
- Windows
- Online
- Google Chrome
- Firefox
Displays the HTTP header. Edit it and send it.