An online collaborative UML editor using PlantUML
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An online collaborative UML editor using PlantUML launched on April 23, 2020 with 116 votes, #369 of 5,003 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
CollabuML is an online collaborative UML editor that uses PlantUML syntax. Launched in 2020, it allows multiple users to work together on UML diagrams in real time through a web browser. The tool is designed for teams and individuals who need to create and edit UML diagrams without installing software. It combines PlantUML's diagram-as-code approach with collaborative features, making it useful for developers, architects, and technical teams working on system design and documentation.
written from the facts on this page · September 2026
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PlantUML based collaborative UML editor is now open source2023 · github.com · ▲185A collaborative UML editor; build with etherpad and plantuml - AlexITC/collabuml
Plantdiagrams2025 · plantdiagrams.com · ▲16Hi 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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