Fiddler vs Charles : Which is Better?

Fiddler icon

Fiddler

Fiddler is an HTTP debugging proxy server application. Developed by Telerik (Eric Lawrence)

License: Free

Apps available for Windows

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Charles icon

Charles

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic. Developed by Karl von Randow

License: Commercial

Apps available for Mac OS X Windows Linux

Fiddler VS Charles

Charles is a premium tool favored for its user-friendly interface and robust mobile debugging capabilities, while Fiddler is a free tool known for its extensibility and advanced scripting options, making it suitable for more experienced users. Both tools excel in HTTP/HTTPS traffic interception, but their approach to usability and additional features differ.

Fiddler

Pros:

  • Highly extensible with plugins and extensions
  • Free to use
  • Excellent performance in handling large volumes of traffic
  • Advanced scripting capabilities
  • Rich feature set for web debugging
  • Strong support for WebSocket
  • Comprehensive network throttling options
  • User-friendly interface for experienced users
  • Session comparison features
  • Good for Windows users

Cons:

  • More complex for beginners
  • UI can be overwhelming
  • Limited built-in tools compared to Charles
  • Occasional performance issues with heavy traffic
  • Less focused on mobile debugging

Charles

Pros:

  • Easy to use interface
  • Supports a wide range of platforms
  • Robust features for mobile debugging
  • Good performance monitoring tools
  • Excellent SSL/TLS support
  • Strong community support
  • Powerful request/response modification capabilities
  • Built-in tools for analyzing data formats
  • Good documentation and tutorials
  • Customizable user interface

Cons:

  • Paid software with a cost
  • Limited plugin support
  • Less flexible for advanced scripting compared to Fiddler
  • Less popular in community
  • Not as strong in Windows integration

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