Compare software

Doxygen vs Natural Docs: catalog facts
Doxygen	Natural Docs
Free Free and open source.	Free Free and open source under the AGPL-3.0 licence.
Windows, macOS, Linux, Command line	Windows
Outputs HTML, PDF, RTF and XML Markdown support in code comments	Supports 25 languages in one documentation set Plain-English comment syntax without heavy tags
PDF output requires a LaTeX setup Configuration has many options to learn	Newer 2.4 features are still in development releases Comment style differs from Javadoc or Doxygen conventions
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: AGPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.