Plan & optimize systems with use case diagrams
Document software with class diagrams
Ensure proper functionality with sequence diagrams
Cacoo makes it easy to create UML diagrams online
Use our extensive collection of UML templates, shapes, and notations
Create use case diagrams, sequence diagrams, class diagrams, activity diagrams, state machine diagrams, and more.
- Industry-standard UML shapes
- Easy drag and drop interface
- Custom shapes
Collaborate with anyone in real-time
Create, edit, and chat about your UML diagrams, together.
- Multi-user editing
- In-app video & chat
- Comments on diagrams
- Activity notifications
Present and share your work
Share your UML diagrams with others.
- Presentation mode
- Screen Share
- Shared folders
- Public diagram links
- Exporting (SVG, PDF, and more)
- Embeddable diagram viewer
Keep files organized and secure
Keep UML diagrams organized with shared project folders.
- Team management
- Security settings
- Groups for easy access
- Guest access
How to make an UML diagram
Set goals & objectives
Determine what requirements need to be met for your system to be considered successful.
Use the importer tool or start from a template or blank diagram
However you get your architecture on the canvas, make sure you accurately represent your current structure before you start making changes.
Assess your diagram for opportunities and risks
Look at your current architecture and determine where you can add or improve things.
Stylize shapes and lines
Customize your colors, text, and lines to make things easy to read.
Collaborate and share
Get feedback from others, make any necessary edits, and share with the right people once it's finalized.
Use our UML diagram templates to get started
Or create your own from scratch.