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.
Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information).
Charles vs Fiddler opinions
It doesnt log outgoing and incoming requests.
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. It also features mitmdump, a commandline tool that provides a tcpdump-like interface for saving, viewing and...
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
Burp Suite is an integrated platform for performing security testing of web applications. Its various tools work seamlessly together to support the entire testing process, from initial mapping and analysis of an application's attack surface, through to finding and exploiting...
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
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.
Requestly is a lightweight proxy available as a browser extension & desktop app to intercept & modify network requests. Using Requestly you can Modify Headers, Redirect Url, Mock API response, Delay/Throttle requests, etc.
API testing tool. Which allows web developers to create and test custom HTTP requests.
Advanced REST Client 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.