PlantUML

What it does

PlantUML is used to draw UML diagrams, using a simple and human readable text description.

Easily create beautiful UML Diagrams from simple textual description. There are also numerous kind of available diagrams. It's also possible to export images in PNG, LaTeX, EPS, SVG.

This editor runs entirely in your browser thanks to our JavaScript rendering engine . Edit the code on the left and see the diagram updatefrom plantuml.com

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  PlantUML based collaborative UML editor is now open source2023 · github.com · ▲185

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  An online collaborative UML editor using PlantUML2020 · collabuml.com · ▲116

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  Plantdiagrams2025 · plantdiagrams.com · ▲16

  Hi HN! I couldn’t find a truly user-friendly PlantUML editor, so I set out to build one. PlantDiagrams lets you describe a diagram in plain English; it generates the PlantUML and renders it instantly. The goal is to shorten the path from idea → diagram without fighting the editor. Tech: - Next.js / Supabase / FLy.io / Vercel Highlights - Natural-language to PlantUML with live preview - Export diagrams (SVG/PNG/TXT) - Organize work with Projects - Share via link; optional comments for review - Sample gallery to open and tweak examples Try it:…

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  PlantUML Web Editor2025 · ▲9

  Create, collaborate, and share UML diagrams

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