HTTP(S) Debuggers

All apps in HTTP(S) Debuggers category. Use the filters below to narrow down your search. 
  1. Fiddler icon
     202 likes

    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.

    45 Fiddler alternatives
    Fiddler screenshot 1

    License model

    • FreemiumProprietary

    Platforms

    • Windows

    Fiddler Features

    1.  HTTP Monitoring
    2.  Debugging
    3.  HTTP Proxy
    4.  Traffic Monitoring
    5.  One click installation
  2. Hoppscotch icon
     39 likes

    Hoppscotch is an open-source API development ecosystem. It helps you create your requests faster, saving you precious time on your development.

    64 Hoppscotch alternatives
    Hoppscotch screenshot 1

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Online
    • Self-Hosted

    Properties

    1.  Lightweight

    Features

    1.  REST API
    2.  Ad-free
    3.  GraphQL API
    4.  Websocket streams
    5.  Command line interface
    6.  Portable
    7.  Cross browser testing
    8.  Browser-based
  3. mitmproxy icon
     68 likes

    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...

    17 mitmproxy alternatives
    mitmweb

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Flatpak

    mitmproxy Features

    1.  Support for scripting
    2.  SSL
    3.  Debugging
    4.  Intercepting HTTP calls
  4. Charles icon
     65 likes

    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).

    26 Charles alternatives
    Charles screenshot 1

    License model

    Platforms

    • Mac
    • Windows
    • Linux
    • iPhone
    • iPad

    Charles Features

    1.  Debugging
    2.  HTTP Monitoring
  5. HTTP Toolkit icon
     33 likes

    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.

    47 HTTP Toolkit alternatives
    HTTP Toolkit screenshot 1

    License model

    • FreemiumOpen Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    HTTP Toolkit screenshot 1
    HTTP Toolkit screenshot 2
    +3
    HTTP Toolkit screenshot 3

    Properties

    1.  Lightweight

    Features

    1.  One click interception
    2.  Debugging
    3.  HTTP mocking
    4.  Ad-free
    5.  Built in docs
    6.  Performance analysis
    7.  Requests monitoring
    8.  OpenAPI integration
    9.  Themes
    10.  Portable
    11.  No registration required
    12.  Command line interface
  6. Proxyman icon
     13 likes

    Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains. Available on macOS, iOS, Windows & Linux.

    49 Proxyman alternatives
    Native macOS app.

    License model

    Platforms

    • Mac
    • Windows
    • Linux
    • iPhone
    Support Multiple Filters
    Advanced Debugging Tools: Breakpoint, Map Local, Scripting, ...
    +2
    Dark Theme

    Proxyman Features

    1.  Website Monitoring
    2.  Dark Mode
    3.  Ad-free
    4.  No registration required
    5.  Detailed packet analysis
    6.  Intercepting HTTP calls
    7.  IPhone debugging
    8.  Debugging
    9.  SSL
    10.  Native application
  7. Requestly icon
     30 likes

    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.

    28 Requestly alternatives
    Modify HTTP Headers

    License model

    • FreemiumOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Microsoft Edge
    • Google Chrome
    • Software as a Service (SaaS)
    • Selenium
    • Firefox
    Redirect URL
    Inject Custom JS/CSS
    +1
    Mock HTTP Response & API Endpoints

    Properties

    1.  Lightweight

    Features

    1.  Intercepting HTTP calls
    2.  Requests monitoring
    3.  Bug reporting
    4.  One click interception
    5.  Real time collaboration
    6.  Ad-free
    7.  Dark Mode
    8.  REST Client
    9.  Traffic Monitoring
    10.  API Management
    11.  Command line interface
    12.  No Coding Required
  8. Caido icon
     3 likes

    Caido is a cutting-edge web application security tool that enables users to efficiently identify and assess potential vulnerabilities in their web applications. It can be easily integrated into both personal and enterprise environments, making it adaptable to a wide range of...

    6 Caido alternatives
    Interception

    License model

    • FreemiumProprietary

    Platforms

    • Online

    Caido Features

    1.  HTTP Proxy
  9. SmartSniff icon
     12 likes

    SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers. You can view the TCP/IP conversations in Ascii mode (for text-based protocols, like HTTP, SMTP, POP3 and FTP) or as hex dump (for non-text base...

    34 SmartSniff alternatives
    SmartSniff screenshot 1

    License model

    • FreeProprietary

    Application type

    Platforms

    • Windows

    SmartSniff Features

    1.  Portable
    2.  Sockets
  10. HTTP Debugger icon
     6 likes

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

    37 HTTP Debugger alternatives
    HTTP Debugger screenshot 1

    License model

    Platforms

    • Windows
    HTTP Debugger screenshot 1
    HTTP Debugger screenshot 2
    +2
    HTTP Debugger screenshot 3

    HTTP Debugger Features

    1.  HTTP Monitoring
    2.  Support of TFS
  11. HttpFox icon
     9 likes

    HttpFox monitors and analyzes all incoming and outgoing HTTP traffic between the browser and the web servers.

    22 HttpFox alternatives
    HttpFox screenshot 1

    License model

    • FreeProprietary

    Platforms

    • Mac
    • Windows
    • Linux
    • Waterfox
    • Pale Moon

    HttpFox Features

    1.  HTTP Monitoring
    2.  Pale Moon Extension
    3.  Customer Analytics
    4.  Legacy Firefox Addon
    5.  Static analysis
    Discontinued

    The project is no longer developed. Last version, 0.8.14.1, released in May 2014, is not compatible with Firefox, but the extension still works on XUL-based Firefox forks like Waterfox icon Waterfox and Pale Moon icon Pale Moon

  12. HttpMaster icon
     7 likes

    Practical and easy-to-use software tool for testing HTTP applications and services.

    53 HttpMaster alternatives
    Main window

    License model

    • FreemiumProprietary

    Application types

    Platforms

    • Windows
    Request item properties
    Parameter definition
    +7
    Validation definition

    Properties

    1.  Lightweight

    Features

    1.  Command line interface
    2.  Request Chaining
    3.  Website testing
    4.  REST API
  13. HTTP Headers icon
     4 likes

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

    17 HTTP Headers alternatives
    HTTP Headers screenshot 1

    License model

    • FreeProprietary

    Platforms

    • Mac
    • Windows
    • Linux
    • Google Chrome

    HTTP Headers Features

    1.  HTTP Proxy
    2.  HTTP Monitoring
    Warning

    Suspected of distribute adwares, even after removing the extension

  14. Fluxzy Desktop icon
     5 likes

    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:

    6 Fluxzy Desktop alternatives
    Friendly UI with a search in every block, easing access to filters, settings, and features.

    License model

    • FreemiumProprietary

    Application type

    Platforms

    • Windows
    • Mac
    • Linux

    Fluxzy Desktop Features

    1.  HTTP Proxy
  15. James icon
     3 likes

    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.

    8 James alternatives
    James screenshot 1

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • React
    • Electron / Atom Shell
    • Node.JS
    Discontinued

    Not sure if 'discontinued' is quite right, but James has now officially moved in 'maintenance mode', with little or no ongoing development or support. See the readme: https://github.com/james-proxy/james#this-project-is-in-maintenance-mode.It would be helpful to highlight that here imo.