PlantUML

Name: PlantUML
Author: PlantUML

An open-source tool that draws UML diagrams (sequence, class, activity and more) from plain text descriptions. An engineering team that wants its diagrams written as text and kept in version control beside the code.

What it costs Read from plantuml.com on 10 November 2026

Free and open source: a GPL version and several other licences

Free to download and run

Open plantuml.com

Answers that name it1 answer

Which free tool should I use to draw flowcharts, org charts and diagrams? Starting Up

In the library1 page

PlantUML Starting Up

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