ltMermaid – Embed Mermaid diagrams in LaTeX

Embed Mermaid diagrams in LaTeX. Diagram sources are written to disk, and the Mermaid CLI (mmdc) renders vector PDFs, which are then included using \includegraphics.

mermaid.sty works with pdfLaTeX, XeLaTeX, upLaTeX, and LuaLaTeX and calls the Mermaid CLI through shellesc or \write18). ltmermaid.sty is for LuaLaTeX and calls the CLI through Lua’s os.execute.

Both implementations provide the same macros, including the Renderer option, the \Mermaid... macros, and the mermaid environment. A diagram is rendered only when its source or the renderer settings change, and both packages support -output-directory.

Sources	/macros/latex/contrib/ltmermaid
Documentation	README.md ltmermaid documentation ltmermaid documentation (Japanese) mermaid documentation mermaid documentation (Japanese)
Home page	https://ryoya9826.github.io/latex/
Repository	https://github.com/ryoya9826/ltMermaid
Version	1.1 2026-10-22
Licenses	The LaTeX Project Public License 1.3c
Copyright	2026 Ryoya Ando
Maintainer	Ryoya Ando
Contained in	TeX Live as ltmermaid MiKTeX as ltmermaid
Topics	Diagrams

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