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C99.nl vs Charles

Professional comparison and analysis to help you choose the right software solution for your needs.

C99.nl icon
C99.nl
Charles icon
Charles

C99.nl vs Charles: The Verdict

⚡ Summary:

C99.nl: C99.nl is an online C and C++ compiler and editor. It allows you to write, compile, and run C/C++ code from your web browser. Useful for testing snippets of code, prototyping algorithms, and learning C/C++.

Charles: 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).

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature C99.nl Charles
Sugggest Score — —
Category Development Development

Product Overview

C99.nl
C99.nl

Description: C99.nl is an online C and C++ compiler and editor. It allows you to write, compile, and run C/C++ code from your web browser. Useful for testing snippets of code, prototyping algorithms, and learning C/C++.

Type: software

Charles
Charles

Description: 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).

Type: software

Key Features Comparison

C99.nl
C99.nl Features
  • Online C/C++ compiler
  • Code editor with syntax highlighting
  • Supports C and C++ languages
  • Can compile and run code directly in the browser
  • Shareable links for code snippets
  • Autocomplete and other code assistance features
  • Integrated debugger
  • Customizable themes and fonts
  • Collaboration features like chat
Charles
Charles Features
  • HTTP proxy
  • HTTP monitor
  • Reverse proxy
  • View HTTP/HTTPS traffic
  • View requests
  • View responses
  • View HTTP headers
  • View cookies
  • View caching information

Pros & Cons Analysis

C99.nl
C99.nl

Pros

  • Easy to use
  • No need to install compilers or IDEs
  • Accessible from any device with a browser
  • Great for learning and experimenting with C/C++
  • Collaborate in real-time with others

Cons

  • Limited compilation and runtime options
  • Not a full-featured IDE
  • Lacks advanced debugging features
  • Only supports C and C++ languages
  • Requires internet connection
Charles
Charles

Pros

  • Debug HTTP/HTTPS connections
  • Inspect traffic between machine and internet
  • Identify performance issues
  • Troubleshoot network requests

Cons

  • Steep learning curve
  • Manual configuration required
  • Extra overhead for all HTTP traffic
  • Potential privacy concerns

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Learn More About Each Product

C99.nl
C99.nl
Reviews, pricing & alternatives →
Charles
Charles
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