Mermaid

Health v2 · maintenance only

Adoption not part of the score

89955 stars · 9187 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Mermaid is a JavaScript library that generates diagrams such as flowcharts, sequence diagrams, and mindmaps from markdown-like text definitions. It includes a live editor and a CLI for rendering diagrams, and integrates widely with documentation tools.

Use cases

• render flowcharts from text in markdown docs
• draw sequence diagrams as code
• embed diagrams in README files on GitHub
• generate architecture diagrams from plain text
• create mindmaps and gantt charts from text
• convert diagram definitions to SVG via CLI

When to choose

• you want diagrams-as-code that live in version control
• you need diagrams inside markdown documentation or wikis
• you want a text-based alternative to diagramming GUIs

When to avoid

• you need pixel-perfect visual design control of diagrams
• you need complex free-form drawing or CAD-like editing
• you need offline rendering without JavaScript or a browser/node environment

Facets

library · maturity stable

data-visualization documentation parser templating developer-tools documentation data-visualization web-development browser cross-platform cli diagrams-as-code flowchart sequence-diagram uml markdown mermaid nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="mermaid-js/mermaid")