HTTP, HTTP2, HTTPS, Websocket debugging proxy

Open source free capture HTTP(S) traffic software ProxyPin, supporting full platform systems

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WPE x64 is a Windows software that can intercept and modify WinSock packets, with adaptive support for 32-bit and 64 bit target programs WPE x64 是一款可以拦截并修改 WinSock 封包的 Windows 软件，自适应支持 32 位及 64 位的目标程序

Want Fiddler Everywhere Enterprise for Free? Then Patch it! Patch any version Automatically!

Customized Fiddler rules, multi-environment switching, cross-domain development, quick debugging of online code | Efficient debugging and analysis tool

Enjoy playing on your PS4 from your computer (WLAN/Ad-hoc) without the need of an Internet connection.

A tool that make your apk debuggable for Charles/Fiddler in Android 7.0

TangGo测试平台是无糖信息技术有限公司集多年渗透测试实战经验设计和开发的国产化综合性测试平台，为软件测试、网络安全从业人员提供强大且易用的测试工具及多人协同的工作环境，主要用于Web站点的功能测试、安全测试和安全评估。

Inspect and modify WCF Binary Messages in Fiddler

Sample applications demonstrating usages of Progress® Telerik® FiddlerCore Embedded Engine.

Open-Source HTTP Interceptor & Mocking Tool

A Fiddler extension for decoding Google Protocol-buffers Data

Java版本的mitmproxy，对本地浏览器所有的Http(s)请求和响应进行拦截并「重制」；也可充当轻量级B/S版抓包软件；

JMeter脚本录制工具：将Fiddler/Charles转换为JMeter 4.0以上的脚本，并支持过滤功能 JMeter script recording tool: converts Fiddler / Charles into scripts above JMeter 4.0, and supports filtering function

Fiddler插件开发笔记

Fiddler Plug，Provide Host Mapping、File Mapping、Header Replace、Https to Http、ServerIP、Disable Cache、vConsole、Console Log、JS Inject

MsgPack implementation with additional debugging and validation tool including Fiddler plugin / msgpack.org[C#]

Just keyauth server emulator made in python

This Fiddler Extension is an Office 365 centric parser to efficiently troubleshoot Office 365 client application connectivity and functionality.