Apps for all platforms with any license



Show 19 less popular platforms
  • Fiddler icon


    Fiddler is a 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.


    Free Windows

  • Charles icon


    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.


    Commercial Mac OS X Windows Linux

  • Firefox Developer Tools icon

    Firefox Developer Tools

    Examine, edit, and debug HTML, CSS, and JavaScript on the desktop and on mobile.


    Free Open Source Mac OS X Windows Linux Firefox

  • HttpFox icon


    HttpFox monitors and analyzes all incoming and outgoing HTTP traffic between the browser and the web servers. It aims to bring the functionality known from tools like HttpWatch or IEInspector to the Firefox browser.


    Free Mac OS X Windows Linux Waterfox Pale Moon

    • Discontinued The project is no longer developed. Last version,, released in May 2014, is not compatible with Firefox, but the extension still works on XUL-based Firefox forks like and
  • WebScarab icon


    There is no shiny red button on WebScarab, it is a tool primarily designed to be used by people who can write code themselves, or at least have a pretty good understanding of the HTTP protocol.


    Free Open Source Mac OS X Windows Linux

    • Discontinued Inactive OWASP project. You can use the newer Edition(s) like OWASP
  • Live HTTP Headers (Chrome) icon

    Live HTTP Headers (Chrome)

    Monitor all HTTP/HTTPs traffic from your browser. Live HTTP Headers logs all HTTP traffic between Google Chrome and the Internet.


    Free Mac OS X Windows Linux Chrome

    • Warning Suspected of distribute adwares, even after removing the extension
  • HTTP Headers icon

    HTTP Headers

    HTTP Headers allows you to quickly see the HTTP header information for the current URL.


    Free Mac OS X Windows Linux

    • Warning Suspected of distribute adwares, even after removing the extension
  • HTTP Debugger icon

    HTTP Debugger

    HTTP Debugger Pro - A Professional HTTP Sniffer and Analyzer for Developers


    Commercial Windows

  • RootCause icon


    Monitor and reproduce errors in web sites/applications. Using the built-in recorder feature you’ll know exactly what the user did. This means you don’t have to read call stacks or parse through huge logs to be able to reproduce bugs.


    Freemium $ $ $ Mac OS X Windows Web Self-Hosted

  • icon is the perfect tool for debugging and analysing both HTTP requests and responses and modify data in transit.


    Commercial $ $ $ Mac OS X

  • kuoll icon


    Bug fixing assistant bot. Web application monitoring that provides debug-friendly user sessions.


    Freemium Web

  • James icon


    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.


    Free Open Source Mac OS X Windows Linux React Electron / Atom Shell Node.JS

  • DebugView icon


    DebugView is an application that lets you monitor debug output on your local system, or any computer on the network that you can reach via TCP/IP.


    Free Windows

  • Surge for Mac icon

    Surge for Mac

    Working quietly on the Menubar, Surge is a high-performance HTTP/SOCKS5 proxy server.


    Commercial $ $ $ Mac OS X iPhone iPad

  • Moesif icon


    Log and analyze HTTP requests. Makes debugging REST APIs and integrated apps easier.


    Commercial Mac OS X Windows Linux Android SDK Ruby C# Python .NET Framework ... iOS JavaScript Django Go (Programming Language) Java Node.JS

  • Rest Client icon

    Rest Client

    Rest Client feature rich rest client for developers to debug and test their RESTful web services. It can be used to request a URL using the following HTTP methods: GET, POST, PUT, DELETE, HEAD, PATCH, COPY, SEARCH, OPTIONS.


    Commercial Mac OS X

  • Omnibug icon


    Omnibug is a plugin for the Google Chrome and Mozilla Firefox browsers to ease developing and debugging web metrics implementations.


    Free Open Source Mac OS X Windows Linux Chrome Firefox