Fiddler is described as 'Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data' and is a very popular http(s) debugger in the network & admin category. There are more than 25 alternatives to Fiddler for a variety of platforms, including Windows, Mac, Linux, Web-based and iPhone apps. The best Fiddler alternative is Charles. It's not free, so if you're looking for a free alternative, you could try mitmproxy or HTTP Toolkit. Other great apps like Fiddler are Burp Suite, Proxyman, HTTP Debugger and Zed Attack Proxy (ZAP).
API Tester is the first mobile app to test any type of API on the go. Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, and HTTPS APIs completely for free, on iOS or Android.
Cellist is a HTTP debugging proxy for OS X.
---How does it work?--- Cellist puts a proxy between HTTP clients and the Internet. All you need to do is set the proxy configuration on your device properly, and then all HTTP traffic will go through Cellist and be revealed in front o.
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.
The goal of this project is to adds information about the HTTP headers in three ways:
Fluxzy Desktop is a comprehensive HTTP debugger and Man-in-the-Middle (MITM) tool available for Windows, macOS, and Linux. It's tailored for developers and network professionals seeking in-depth web traffic analysis and manipulation. Key features include:
It is free, based on a open-source base implementation and is able to analyse not only HTTP/v1.1, but also HTTP/2 and HTTPS traffic. It is easy to configure and under Windows integrates itself as system proxy, so that the client programs do not need to be reconfigured.
IEWatch is a plug-in for Microsoft Internet Explorer that helps you achieve your web development and web analysis tasks more efficiently.
HttpWatch is an HTTP viewer and debugger that integrates with IE and Firefox to provide seamless HTTP and HTTPS monitoring without leaving the browser window. It's available as a free edition and a PRO version that cost money and has additional features.
Pirni Pro is a network security tool designed for iOS, and specifically for iPhone and iPod Touch devices. It is capable of intercepting traffic on a wireless network segment, capturing passwords, and regular expressions entered by the user.
WebSiteSniffer is a packet sniffer tool that captures all Web site files downloaded by your Web browser while browsing the Internet, and stores them on your hard drive under the folder that you choose.
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Not even in the same category. Fiddler is a HTTP/S request analyzer and proxy.