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SwiftPlantUMLclang-uml
Free

Free and open source under the MIT licence.

 Free

Free and open source under the Apache-2.0 license.

macOS Command line
  • Works from inside Xcode and from the Finder
  • Produces class diagrams directly from Swift code
  • Generates multiple UML diagram types
  • Exports to PlantUML, MermaidJS, GraphML, and JSON
  • macOS and Swift only
  • No tagged releases and infrequent updates since early 2024
  • Focused on C, C++, and Objective-C code
Downloadable app Downloadable app
Open source Open source
License: MIT License: Apache-2.0
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked October 8, 2026

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