Free Online Diagram Software

A Free online drawing software to create UML, ER Diagrams and Organization Charts

Need a free online diagram software?

Visual Paradigm Online is the most popular web-based diagramming software and comes with a ton of user-friendly features that makes it the best diagramming solution. Visual Paradigm Online Free Edition, free for non-commercial use, supports the creation of UML, ER Diagram and Organization Chart online. The huge collection of tools and diagram examples makes it a perfect asset for designers and engineers.

Class diagram example

Diagram with a top-rated online design software

Absolutely Free

Free diagram software ready for non commercial uses!

  • Draw as many diagrams and shapes as you like
  • Unlimited accessing period
  • No advertisements
  • Produce JPG, PNG and other image formats

Simple & Fast

Create professional drawing conveniently with our intuitive online drawing tool. Some of the editing features:

  • Drag-to-create shape
  • Well attached connectors (no separate apart)
  • Draw with your own shapes
  • Hundreds of diagram templates


Draw any of the popular diagrams such as UML diagrams, ERD, Org. Chart, Floorplan, Business Concept Map and ITIL Diagrams. More diagram types (e.g. Flowchart, Mind Map, ArchiMate, BPMN etc) are available in paid editions with highly affordable price.

Key features and benefits

Key features and benefits
  • Unlimited period of access
  • Unlimited number of diagrams
  • Unlimited number of shapes
  • UML Tool, ERD Tool, Organization Chart Maker, Floor Plan Designer, Business Concept Diagram, ITIL
  • Can be upgraded to paid editions for more diagram types and features
  • Works on all OS (Windows, Mac, Linux) and compatible with all web browsers
  • Easy to use: Create and connect shapes with drag and drop. Connectors are always attached 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
  • Build your own shape library to create diagrams with your own shapes.
  • Easily add text, notes, external images, web links to diagram
  • Print and export into different formats (PNG, JPG, SVG, GIF, PDF)
  • Hundreds of start-up diagram examples and diagram templates
  • Save your drawing in Google Drive
  • Visio drawing and stencil import

But don't take our word for it

Try it yourself. Just browse the 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.

Start Drawing Your Free Diagram Today

No limitations, no obligations, no cancellation fees.

Get Started