UML Diagram Online

Create Professional UML Diagrams Online

An end-to-end, integrated and easy-to-learn platform to create UML diagrams. Use Creately’s UML diagram creator as an effective tool for UML modelling, architecture and design.

Create a UML Diagram

Intelligent, standards-compliant UML shapes
Real-time collaboration for team design sprints
Link models, add notes, and centralize your design docs

UML Diagram Online

Over 10 Million people and 1000s of teams already use Creately

Diagramming

Visual Collaboration

Org Chart

How to Create a UML Diagram Online in Creately

Launch Creately

Sign in to your account and open a new workspace. With the UML diagram online editor, you can start from scratch or choose a pre-designed template to save time.

Add UML Shapes & Connectors

Use Creately’s drag-and-drop UML shapes library to build your diagram. Add classes, objects, and relationships with standard notations, and connect them effortlessly to visualize system behavior.

Organize & Customize

Map out your objects, classes, and relationships. Use sticky notes, the notes panel, and connectors to add details, annotations, and context right inside your diagram.

Collaborate in Real Time

Invite teammates to co-create. Use inline comments, live mouse tracking, and shared editing to build your UML diagram online together, no matter where your team is.

Review, Update & Share

Finalize your diagram and share it with stakeholders using secure links or export options. Update easily as your system evolves, ensuring your UML stays relevant and accurate.

How to Create UML Diagrams?

VISUALIZE

Model Software Systems with Intuitive UML Diagram Generator

snapshot of sequence diagram for transport service

Create intuitive UML diagrams with a comprehensive UML shape library and drag-and-drop tools to easily add any shape onto the canvas.
Visualize actors, objects, attributes, and more on a single, connected workspace for clear system modeling.
Easy-to-use diagram tools to simplify the visualization process when designing complex systems.
Multi-perspective modeling with adaptive shapes that change according to the context.
Intuitive features like color themes, formatting options, and reusable templates to speed up diagram creation.

snapshot of uml diagram template drawn using Creately app

SIMPLIFY

Create Simple Representations of Complex Systems

Easily locate specific information within large and complex UML diagrams with universal full-text search functionality.
Use connected shape links to build navigation structures to easily represent how components in a system interact.
Streamline the process of editing, reviewing and sharing UML diagrams across teams, with advanced collaborator controls.
Simplify complex workflows by grouping related shapes, adding notes, and managing diagram layers effortlessly.

COLLABORATE

Easily Design Systems Together With Your Team

snapshot of how to share your uml diagram using Creately app

Work with team members on your UML diagram online in real-time; add multiple collaborators.
Use @mentions and contextual commenting, to discuss and follow up on the same canvas. Async!
Version history to save and revert back to streamline reviewing and revising.
Access-controlled sharing options make it simple to invite stakeholders or export diagrams for presentations and documentation.

snapshot of ecommerce website uml diagram

EXECUTE & EXTEND

Augment and Interact with Your Data

Add notes, key details, and custom properties to your UML diagrams to make them rich in context and actionable.
Use frames to split the canvas into multiple boards and create several UML diagrams on the same workspace.
Connect seamlessly to Slack, GitHub, Confluence, and other platforms using Creately UML Maker’s plug-ins.
Enhance diagrams with interactive features like hyperlinks, data fields, and embedded references for better team understanding.

Ideate, plan, and execute ideas better with Creately

Create a UML Diagram Request a Demo

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 abstraction that meet the needs of your audience. Creating unnecessarily complex diagrams with too much information can confuse stakeholders. When creating an online UML diagram with Creately’s UML diagram tool, you can create multiple diagrams on different workspaces and link them together for better comprehension.
Avoid lines crossing over each other when you make 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 makes 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.

Visualize UML Diagrams with Ease

Class Diagram

Component Diagram

Deployment Diagram

Object Diagram

Package Diagram

Profile Diagram

Composite Structure Diagram

Use Case Diagram

Activity Diagram

State Machine Diagram

Sequence Diagram

Communication Diagram

Interaction Overview Diagram

Timing Diagram

What Our Customers Say About Us

A Comprehensive Tool for Visual Collaboration and Diagramming

it is ease of collaborative diagramming and real-time editing. This allows teams to brainstorm, create, and refine diagrams together in a way that feels intuitive and seamless, regardless of location.

Juan Leonardo G

Efficient and User-Friendly Diagramming Tool

I love how easy it is to create and collaborate on diagrams with Creately. The real-time collaboration feature is incredibly helpful for team projects, and the extensive library of templates and shapes saves a lot of time

Aymen G

Creately provides best diagram structure.

Creately has proven to be an incredibly creative tool, enhancing the visual appeal of our company tasks significantly. Additionally, its pricing is highly competitive, offering great value for the features it provides.

Ruchika N

Great AI features

AI Modelling capability. It gives Prompt examples so user can learn how to create effective prompts

Karma A.

User friendly and visually appealing!!

The interface is easy to use. The look is aesthetically pleasing as well. Love the functionality.

Chrisoula

FAQs About the UML Diagram Maker

What are Creately’s UML diagram online pricing plans?

Free Plan — $0/month for basic UML diagram creation and collaboration
Starter & Team Plans — $8/month or $5/month billed annually
Business Plan — $149/month or $89/month billed annually

Annual billing helps you save more while unlocking advanced collaboration, workspace management, and enhanced UML diagram features. You can compare all available plans and features on the Creately Pricing Page.

How can you create UML diagrams faster?

Creately helps you create UML diagrams faster with an infinite canvas, drag-and-drop diagramming, smart connectors, and professionally designed templates. You can start with a ready-made layout or build from scratch, then collaborate and refine everything in one shared workspace.

Are there templates for different UML diagram use cases?

Yes. Creately offers editable templates for different UML diagram use cases, so you can start with a relevant structure and customize it to match your workflow, team, or project requirements.

Can teams collaborate on UML diagrams?

Yes. Teams can work together on the same UML diagram in real time using live cursors, comments, mentions, and shared workspaces. This makes reviews faster and keeps everyone aligned.

Can I add notes, data, and files?

Yes. Creately lets you enrich your work with notes, links, images, documents, and additional context attached directly to shapes and items on the canvas. This helps you keep supporting information connected to the visual.

Can I share, present, or export UML diagrams?

Yes. You can share UML diagrams with a link, present them directly from the workspace, or export them in formats like PDF, PNG, SVG, and JPEG. This makes it easy to use Creately in meetings, documentation, reviews, and presentations.

Streamline Your Workflows by Integrating with the Tools You Love

Creately integrates with the tools your teams use every day and supports your team’s workflow seamlessly.