The best Web Debugger alternative to Fiddler is Charles. It's not free, so if you're looking for a free alternative, you could try mitmproxy or HTTP Toolkit. If that doesn't suit you, our users have ranked more than 25 alternatives to Fiddler and 12 are Web Debuggers so hopefully you can find a suitable replacement. Other interesting Web Debugger alternatives to Fiddler are HTTP Debugger, Zed Attack Proxy (ZAP), Requestly and HttpMaster.
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).
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 is able to edit response data
It's able to analyze http requests made by other proxies, many other of the alternatives here only allow creating requests
mitmproxy is free and well featured, but fiddler does have an easier workflow to start with
HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools and automatic interception for clients from Docker to Android to iOS.
HTTP Debugger Pro - A Professional HTTP Sniffer and Analyzer for Developers.
The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications.
ZAP is a proxy for attacks, not a proxy for development
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.
Working quietly on the Menubar, Surge is a high-performance HTTP/SOCKS5 proxy server. It is capable of intercepting and logging the summary of HTTP traffic, and meanwhile transmitting the traffic to other proxy servers according to the flexible rule system.
HttpFox monitors and analyzes all incoming and outgoing HTTP traffic between the browser and the web servers.
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.
ReqRes is an open-source, high-performance, modern native web debugging proxy for macOS. It lets you capture, inspect, modify, and intercept HTTP(S) traffic in real time.
New Zealand
Spain
EU
United States
Germany
It doesnt log outgoing and incoming requests.