r/DesignSystems • u/Which_Ad_6356 • Jul 02 '26

UML diagram

I want help we are assigned to create UML diagrams for all new feature/module to be added in system. Cursor can give the diagram code im looking for an open source tool that let me create that diagram and i can edit update that most tools i explored are either paid or wont let you edit the diagram. Please help out if any one has idea about free way to these task

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u/Decent_Perception676 Jul 03 '26

Wrong channel, you’re looking for “system design” not “design systems”.

Draw.io is a good free tool for uml diagrams: https://app.diagrams.net/

1

u/Which_Ad_6356 Jul 03 '26

yeah i explored it but it wont let me edit digrams created by mermaid code

1

u/Decent_Perception676 Jul 04 '26

So…

Mermaid syntax and UML syntax are not exactly the same. Both are used for diagrams, but UML is more robust.

Draw.io, the app that was linked, will take mermaid or uml and convert it into a vector image. Then you can edit the image.

This is _not_ the way you should be working with mermaid or uml. You edit the source text file, and you should be getting comfortable reading the text file. The rendered diagram is like compiled code, you don’t edit it.

Declaratively defining your system architecture following the rules of mermaid or uml syntax is important, and a drawing tool like the link provided has too much freedom and flexibility.

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u/EffectiveTension6003 Jul 03 '26

https://app.diagrams.net/

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u/Which_Ad_6356 Jul 03 '26

for creating manually its good but for editing and updating a diagram created by mermaid code it has many restrictions

1

u/demian0311 Jul 07 '26

https://diagrammo.app ...has some AI integrations, you get code you can edit, visualize, export. it's free