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PlantUML to ER Diagram
Paste a PlantUML entity or class diagram and turn it into a fully interactive ER diagram — drag tables, auto-arrange, and export — no Java or PlantUML server required.
Open the diagram tool →No signup · nothing uploaded · export PNG / SVG / Mermaid / DBML · shareable link
How it works
- Copy your PlantUML
@startuml … @endumlblock (entity or class diagram). - Paste it into the editor — PlantUML is auto-detected.
- Each
entity/classbecomes a table; relationship lines become relations. - Arrange, hide tables, then export PNG/SVG or convert to Mermaid/DBML.
Example
PlantUML like this:
@startuml
entity users {
* id : int
email : varchar
}
entity orders {
* id : int
user_id : int
}
users ||--o{ orders
@enduml
…renders two tables with a relation from orders → users. Try it with your own →
Why use it
- Private: everything runs in your browser — nothing is uploaded or stored on a server.
- No server needed — renders instantly in the browser, unlike a PlantUML render pipeline.
- Interactive: drag tables, auto-arrange, hide noise, add notes, and manually link columns.
- Export a high-res PNG, vector SVG, or the schema as Mermaid / DBML / PlantUML code.
- Free & open source — no account, no sign-up.
PlantUMLMermaidDBMLSQL
FAQ
Do I need a PlantUML server or Java?
No — paste the PlantUML text and it renders directly in your browser as an interactive diagram you can edit and export.
Which PlantUML diagrams work?
Entity-relationship and class diagrams: entity / class blocks with fields, plus relationship connectors like ||--o{.
Is my schema uploaded anywhere?
No. Everything runs locally in your browser — your schema is never uploaded to or stored on any server.
Is it free?
Yes. It is completely free and open source, with no account or sign-up required.