Need a free online UML component diagram software?

Visual Paradigm Online is an impressive suite of lightweight diagramming tools that support a wide range of visualization needs. Its Free Edition includes a free online diagram editor that supports various diagrams like UML, ERD, Organization Chart, Floor Plan and more. Visual Paradigm Online features an intuitive UI and a wide range of powerful and easy-to-use diagramming tools, making software design easy without any learning needed.

Make a Component Diagram

Everything you need to create amazing component diagrams

Free UML Editor

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

No limited number of diagrams and shapes
No limited period of access
No advertisement

Draw Faster & Better

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

Drag and drop diagram editor
Sticky connectors' end points
Instant replication of shape format
Keep patterns of shape as template
Rich set of diagram templates

Features that Help

A full set of professional diagram tools are ready to support you in creating high quality component diagrams:

Accurate shape positioning with alignment guide
Include external images, URLs and text in diagrams
Wide range of formatting options
Easily rotatable shapes
Group, align and distribute shapes
Build an item list for instant shape formation

Key features and benefits

Unlimited period of access
Unlimited number of diagrams
Unlimited number of shapes
UML, ERD, Org Chart, Floor Plan Maker, Business Concept Diagram, ITIL
Can be upgraded to paid editions for more diagram types and features
Multi-platform support: Windows, Mac, Linux. Also 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
Easily embed text, external images and web links to diagram
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

But don't take our word for it

Try it yourself. Just browse the Component 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.