Want a free, web-based component diagram creator?

Visual Paradigm Online Free Edition offers a free UML component diagram tool for personal uses. No matter you are a student or educator, you can start creating component diagrams with an online, flexible and simple UML software now! As an all-in-one diagramming solution, VP Online also supports ERD, org. charts and floor plan, for free! Advanced diagram types such as flowchart, ArchiMate, BPMN, mind map are all available in higher editions at very low cost.

Make a Component Diagram

Create fantastic component diagrams

It's Free

Create as many diagrams as you like. Output diagrams into images (PNG/JPG/GIF/SVG) or PDF. Simply free!

No limited number of diagrams and shapes
Non-restricted accessing period
No banner / advertisement

Simple & Fast

Create professional component 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

Be a Pro.

A range of powerful diagramming tools are there to support you in producing great component 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, 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.