# PlantUML Editor Online

> Preview PlantUML diagrams in the browser and keep UML source ready for engineering docs, reviews, and handoffs.

Canonical: https://unidiagram.davidtran.dev/plantuml-editor

Preview PlantUML diagrams in the browser and keep UML source ready for engineering docs, reviews, and handoffs.

## Open the editor

- App: https://unidiagram.davidtran.dev/app
- Pricing: https://unidiagram.davidtran.dev/pricing.md

## Use cases

- Formal UML sequence diagrams
- Architecture review artifacts
- Long-lived technical specifications

## Pro value

Upgrade when final diagrams need PDF or high-resolution PNG.

## Sample

```
@startuml
actor User
participant "Web App" as App
database "Database" as DB

User -> App: Request report
App -> DB: Load diagram data
DB --> App: Report rows
App --> User: Rendered response
@enduml
```

## Related

- Home: https://unidiagram.davidtran.dev/index.md
- Pricing: https://unidiagram.davidtran.dev/pricing.md
- Blog: https://unidiagram.davidtran.dev/blog.md