Free online UML class diagram solution here!

Visual Paradigm Online Free Edition offers free UML class diagram tool for personal uses. Students and educators, start drawing class diagrams with an online, flexible and simple UML software today! Besides UML, you can also create ERD and org. charts with VP Online, for free! Advanced diagram types such as Flowchart, ArchiMate, BPMN, mind map are all available in higher editions in very low cost.

Make a Class Diagram

Easily create beautiful class diagrams

It's Free

Create as many UML diagrams as you like. Output your work as images (PNG/JPG/GIF/SVG) or PDF. Enjoy!

Unlimited number of diagrams and shapes
Unlimited period of access
No ads.

Draw Fast

Create professional class diagrams in a snap. Our online UML tool features:

Drag and drop interface
Connectors attached (no separate apart)
Format Copier: Instant format copying
Keep a lib of shape patterns for reusability
Several hundreds of diagram templates

High-Quality Design

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

Position shape precisely with alignment guide
Include your own images, URL and text in diagrams
Full set of shape and line format options
Rotatable shapes
Group, align and distribute tools
Auto. form shape from text list

Key features and benefits

Unlimited period of access
Unlimited number of diagrams
Unlimited number of shapes
UML Diagram Tool, ERD Tool, Organization Chart Maker, Floor Plan Designer, 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
Visio drawing and stencil import
Draw your own diagrams with your own shapes.
Easily embed text, external images and web links to diagram
Get start quickly with hundreds of diagram examples and diagram templates
Print, export and share your work in different formats (PNG, JPG, SVG, GIF, PDF)
Google Drive Integration

But don't take our word for it

Try it yourself. Just browse the Class 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.