Here is a Free UML Editor!

Visual Paradigm Online is a popular and robust online UML editor, with lots of simple and advanced diagramming features that support different UML diagramming needs. For beginners, there are plenty of UML examples and templates to help you get started in creating your own UML diagrams. The Free edition is free for non-commercial use and support everything you need in system design: UML, ERD, Organization Chart and more. You may upgrade to higher editions for more diagrams like flowchart, ArchiMate, PERT, BPMN, mind map, PERT with a very low cost.

Open the Diagram Editor

Everything you need to create amazing UML class diagram and more

Free Online Editor

Free UML diagram software ready for non commercial uses!

Create unlimited number of diagrams and shapes
No limited period of access
No ads

Simple & Quick Diagram

Create brilliant online UML diagrams with our intuitive online UML editor. Highlighted features:

Drag and drop based editor
Reliable connectors (no separate apart)
Format copier
Keep a lib of shape template for reuse
Hundreds of start-up templates

Better Results

Draw better UML diagrams with the use of powerful editing tools. Here are some of the editing features to support you in creating brilliant UML diagrams:

Alignment guide: Position shapes accurately
Embed your own image, URL and text
Shape and line formatting options
Rotatable shapes and text
Group, align and distribute shapes
Auto. create shape from item list

Key features and benefits

Unlimited period of access
Unlimited number of diagrams
Unlimited number of shapes
UML Tool, ERD editor, Org. Chart editor, Floor Plan tool, ITIL, Business Concept Diagram
Can be upgraded to paid editions for more diagram types and features
Cross-platform: Windows, Mac, Linux. Compatible with all web browsers
Easy to use: Create and connect shapes with drag and drop. Connectors will snap to shapes and never separate apart.
Apply different formatting options (shape and lines, solid and gradient paint), 40+ connector types, RTF caption, font options, shadow effect, etc
Draw your own diagrams with your own shapes.
Visio drawing and stencil import
Print, export and share your work in different formats (PNG, JPG, SVG, GIF, PDF)
Get start quickly with hundreds of diagram examples and diagram templates
Google Drive integration
Easily embed text, external images and web links to diagram

But don't take our word for it

Try it yourself. Just browse the UML Diagram examples below and click Open Diagram to open and edit. You will see for yourself that it is everything we say it is, or perhaps more.