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Plugins Directory » Redmine Mermaid

Author: Shi-Xun Huang
Website: https://github.com/enricohuang/redmine_mermaid
Code repository: https://github.com/enricohuang/redmine_mermaid
Registered on: 2026-02-10 (10 days ago)
Current version: 1.0.0
Compatible with: Redmine 6.1.x, 6.0.x, 5.1.x, 5.0.x
User ratings:   (0)

A Redmine plugin that renders Mermaid diagrams in Markdown (CommonMark) code blocks. Write fenced code blocks with the mermaid language tag and they render as SVG diagrams when viewing issues, wiki pages, and anywhere else Redmine processes Markdown.

Usage

In any Markdown text field (issue description, wiki page, comments, etc.), write a fenced code block with the mermaid language tag:

```mermaid
graph TD
    A[Start] --> B{Decision}
    B -->|Yes| C[OK]
    B -->|No| D[Try Again]
    D --> B
```

When the page is viewed, the code block is replaced with a rendered SVG diagram.

See https://mermaid.js.org/intro/ for the full list and syntax reference.

Installation notes

Clone the repository into your Redmine plugins directory:

cd /path/to/redmine/plugins
git clone https://github.com/enricohuang/redmine_mermaid.git

Changelog

1.0.0 (2026-02-09)

Compatible with Redmine 6.1.x, 6.0.x, 5.1.x, 5.0.x.