Free Class Diagram Tool

Draw Class Diagram easily and quickly online. It's intuitive, simple and, Free of Charge.

Finding a Free Class Diagram Tool?

Visual Paradigm Online (VP Online) Express Edition is a FREE online drawing software that supports Class Diagram, other UML diagrams, ERD tool and Organization Chart tool. It features a simple yet powerful editor that allows you to create Class Diagram quickly and easily. The free UML editor comes with no ad, no limited period of access and no limitations such as, number of diagrams, number of shapes and etc. You own the diagrams you created for personal and non-commercial purposes.

Online Class Diagram Tool

Speedily draw Class Diagram

Free UML Software

Draw Class Diagram for personal use for free:

  • No limited number of diagrams and shapes
  • No limited period of access
  • No ad

Draw as many diagrams as you like. Export your drawing into PNG/JPG/GIF/SVG/PDF.

Simple Yet Powerful

UML diagramming can be simple and fun. Here are some of the features of our Class Diagram editor:

  • Drag-to-create shape
  • Well attached connectors (no separate apart)
  • Inline editing of Class Attributes and Operations
  • Draw your own diagrams with your own shapes
  • Hundreds of diagram examples and templates

Impressive Drawing

Position shapes precisely using the alignment guide. Format your Class Diagram with an array of formatting tools: Shape and line format, font style, rotatable shapes, shape alignment and distribution, embed image and URL, shadow effect, etc


Key features and benefits

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 are sticked 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.

Class Diagram Example: Sales Order System

Open Diagram

Class Diagram Example: Sales Order SystemOpen Diagram

Class Diagram Example: Car

Open Diagram

Class Diagram Example: CarOpen Diagram

Class Diagram Example: Telephone

Open Diagram

Class Diagram Example: TelephoneOpen Diagram

Class Diagram Example: Star-Based LAN

Open Diagram

Class Diagram Example: Star-Based LANOpen Diagram

Start Drawing Your Free Diagram Today

No limitations, no obligations, no cancellation fees.


Get Started