# PlantUML

Generate diagrams from textual description

Repository: https://github.com/plantuml/plantuml
Canonical: https://ross.abutalabs.com/products/plantuml
Homepage: https://plantuml.com
Language: Java
License: LGPL-3.0
License Family: copyleft
Topics: diagram, diagram-as-code, diagrams, diagrams-as-code, java, plantuml, uml, uml-diagram
Last push: 2026-08-26T10:33:20+00:00
Link (homepage): https://plantuml.com
Link (site_page): https://plantuml.com/faq

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 5781, "days_push": 7, "days_rel": 8, "gap_med": 11.5, "n_releases_24m": 31}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13271, forks 1229 (observed 2026-08-28T04:11:02.956770+00:00)

## What it is
PlantUML is an open-source Java tool that generates UML and other diagrams (sequence, class, activity, Gantt, mindmap, and more) from simple textual descriptions. It includes a rendering engine, an online editor, and a companion server for hosting diagram rendering as a service.

## Use cases
- generate UML diagrams from text
- draw sequence diagrams as code
- embed architecture diagrams in documentation
- render diagrams in markdown or GitHub
- create class and activity diagrams from plain text
- self-host a diagram rendering server

## When to choose
- you want diagrams version-controlled as plain text
- you need many UML diagram types with automatic layout
- you want to integrate diagram rendering into docs, wikis, or CI

## When to avoid
- you need strict UML model validation rather than drawing
- you prefer drag-and-drop visual diagram editors
- you need pixel-perfect manual layout control

## Facets
- artifact type: application
- maturity: stable
- function: graphics, developer-tools, documentation
- domain: developer-tools, documentation, web-development
- platform: cross-platform, jvm, cli, browser
- tags: uml, diagram-as-code, diagrams-as-code, sequence-diagrams, text-to-diagram, java, web-server

## Member repositories
- plantuml/plantuml (main) score 99
- plantuml/plantuml-server (backend) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:02.956770+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:23.573585+00:00, confidence not recorded.
  - readme: https://github.com/plantuml/plantuml (fetched 2026-08-28T04:11:02.956770+00:00, sha 62011c02d126)
  - homepage: https://plantuml.com (fetched 2026-08-29T08:08:30.654940+00:00, sha d8a73933d391)
  - site_page: https://plantuml.com/faq (fetched 2026-08-29T08:08:30.657834+00:00, sha 0a97e9fbc16a)
- Data as of 2026-08-30T08:39:29.467469+00:00.