Online UML Diagram Tool

Draw UML Diagrams online, with an easy-to-use online UML tool


A UML editor online

Easily draw UML diagrams with an online UML software that features powerful UML diagramming tools, on-the-fly UML syntax checks and a neat user interface. Visual Paradigm Online supports UML diagrams like Class, Use Case, Sequence, Activity, Deployment, Component, State Machine and Package Diagram.

Fast UML diagram

Draw UML diagrams effortlessly with intuitive web UML tools. We provide everything you need to draw UML quickly without sacrificing the quality and integrity of your work.

  • Inline editing of shape name (e.g. Use Case) and members (e.g. Attribute)
  • Quick shape creation with Resource Catalog
  • Group shapes and move together
  • 1-Click-to-align and distribute shapes
  • Drag-and-drop sequence message creation

Inline editing of class members

Class members are selectable and editable compartments managed within a class shape, not free text labels.s


Easy-to-use sequence diagram editor

Sequence Diagram are constructed with specialized UML shapes instead of primitive shapes like rectangles and arrows.


Re-use shapes in other diagrams

Keep commonly-used shapes in palette and reuse them in other diagrams. This not only saves your time from re-working, but also makes your design consistent.


Mixed use of notations

Leverage the power of UML diagramming, convey the right messages with the mixed use of notations beyond standards. You can incorporate any kind of notations into any diagrams, regardless of their standards. You can, for instance, put an UML action next to a use case, an ArchiMate work package next to UML nodes, and so forth.



カスタムグラフィックスを使用してチャートを描画します。さまざまなグラフィック形式(SVG、JPG、PNG など)をサポートしています。


Much more than a UML software