Mermaid
Mermaid open-source project
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mermaid.live
An open-source library that turns a simple text description into a diagram: flowcharts, sequence, class, state and entity-relationship diagrams, Gantt charts, timelines, mind maps and more. The diagram is stored as text, so it goes into version control and is easy to update. GitHub renders it directly in Markdown files, and there is a live editor in the browser. Well suited to documenting processes, schedules and system structures. Control over styling and the exact placement of elements is limited.
Ratings & Reviews
| Licence type | Completely Free, Open Source |
|---|---|
| Licence terms | The library and the live editor are open source under MIT, free for any use including commercial. The collaborative platform built around it is a separate commercial product and is not required. |
| Platforms | Runs in the Browser |
| Engineering field | Architecture, Civil Engineering, Electrical & Electronics, Mechanical Engineering, Software & Computing |
| Tool type | General Productivity |
| Vendor site | mermaid.ai |
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Last verified: 2026-10-05
