UML Diagram Tool

The easiest set of tools for creating complex UML
diagrams and models for software teams. Understand
source code, plan new features, and visualize
flows and tasks within your system.

  • Extensive UML shape library supporting all
    13 UML diagram types
  • Real-time visual collaboration, bring your
    team on board
  • Drag and drop interface to easily model complex
    UML diagrams
Start For Free
National Geographic
Model Software Systems

Model Software Systems

Model Software Systems

Simple to use drag and drop tools to easily add UML shapes onto the canvas. Visualize actors, objects, dependencies, attributes, classes, packages and much more on a single, connected workspace.

Purpose designed diagram tools to enable smooth visualizing when designing systems.

Multi-perspective modeling with adaptive shapes that change according to the context they are placed in.


Create Easily Understandable Representations of Complex Systems

Create Easily Understandable Representations of Complex Systems

Universal, full-text search to easily find specific nodes and information in large, complex UML diagrams.

Connected shape links to build navigation structures to easily represent how components in a system interact.

Advanced collaborator controls to streamline sharing, reviewing, and editing of UML diagrams.

Create Easily Understandable Representations of Complex Systems
Design Systems Together With Your Team

Design Systems Together With Your Team

Design Systems Together With Your Team

Real-time cursors for any number of participants. Collaborate with team members on a shared canvas- add multiple collaborators and create UML diagrams together.

Video conferencing baked into the platform to feel like you are in the same room.

Comment with context, have discussions and follow-ups on the same canvas. Async!

Version history to save and revert back to each iteration to streamline reviewing and revising going forward.


Augment and Interact with Your Data

Augment and Interact with Your Data

Add even more interaction to your UML Diagrams by adding reference notes and other key details to elements with custom properties and additional data fields.

Frames and containers to split canvas to boards. Organize diagrams and create multiple UML diagrams on the same canvas.

Connect to your favorite tools with Creately plugins for Slack, Google Workspace, Confluence, and more.

Augment and Interact with Your Data

What Are UML Diagrams?

UML or Unified Modeling Language is a modeling technique used to document software. UML diagrams visually represent a system along with its main actors, roles, actions, artifacts or classes, in order to better understand, alter, maintain, or document information about the system.

Things to Remember While Creating UML diagrams

  • When creating UML diagrams it is important to remember to create levels of abstractions that meet the need of your audience. Creating unnecessarily complex diagrams with too much information can confuse stakeholders. When creating UML diagrams you can create multiple diagrams of different workspaces and link them together for better comprehension.
  • Avoid lines crossing over each other while creating UML diagrams. This allows your diagrams to be more readable and understandable. If two lines must cross, use a “bridge” to show that the lines do not intersect.
  • Try to make sure all lines go horizontally or vertically and create right angles with each other. When drawing connectors, having lines with multiple connectors make diagrams look messy and confusing.
  • When drawing generalization or realization hierarchies on a diagram always make sure the parent elements are higher than the child elements so the arrows always point upwards.