Clang-uml – C++ to UML diagram generator based on Clang

In plain words

Clang-uml is an open-source C++ to UML diagram generator that uses YAML configuration files to automatically create diagrams from code. It supports class, sequence, package, and include diagrams for C++17 and C++20 code, with output in PlantUML and JSON formats. The tool helps maintain current documentation and understand legacy codebases through configurable filtering, template relationship visualization, and namespace-based package generation.

written from the facts on this page · September 2026

From the sources

Customizable automatic UML diagram generator for C++ based on Clang. - bkryza/clang-uml

In the maker’s words, at launch

Hi, clang-uml is an open-source C++ to UML diagram generator, driven by YAML configuration files. The main idea behind the project is to easily maintain up-to-date diagrams within a code-base or document legacy code. The configuration file for clang-uml defines the types and contents of each generated diagram. The…

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