Online UML Diagram Tool

Draw UML Diagrams online, with an easy-to-use online UML Diagram Tool

Class diagram example

A UML editor online


Easily draw UML diagrams with an online UML editor that features powerful UML editing 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
Fast UML diagram

Inline editing of class members

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

Inline editing of class members

Easy-to-use sequence diagram editor

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

Easy-to-use sequence diagram editor

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.

Re-use shapes in other diagrams

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.

Mixed use of notations

Design with your own shapes

Visual Paradigm supports hundreds of shape types from various standards, and you can add even more by using the import function. You can create a palette consisting of your stencils in image formats (e.g. SVG, JPG, PNG, etc) and use them in your design.

Design with your own shapes