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

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

Diagramming

Visual Collaboration

Org Chart

Used by Over 10 Million people and 1000s of teams

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

Small-Business

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

Small-Business

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

Assistant Manager

Creately: Simple Diagram Tool

I like that Creately is easy to use. It helps me create diagrams quickly and easily.

Ananya G

Executive Committee Member

Creately: A smart choice for expressing ideas over diagrams

Creately is a simple and user-friendly application for creating diagrams to visualize complex technical ideas and data flow on wireframes, flow charts, and other visual options. The best part of this tool is its real-time collaboration features, which help us to enhance the workflows in the team.

Gulam M

Software Engineer

User friendly and visually appealing!!

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

Chrisoula

Small-Business

Intuitive Design and Effortless Creativity

What I like best about Creately is its intuitive design and the ease with which it allows me to create attractive designs. From the moment I started using it, I was impressed by how easy it was to navigate the platform and how quickly I could bring my ideas to life in visually appealing diagrams and charts.

DARWIN M.

Mid-Market

Creatly Awesome App

In creatly easy to use and easy to design our all network diagrams for the clients and easy to export and Creately offers a user-friendly interface that makes it easy for users to create various types of diagrams without extensive training or experience. We used creately on daily basis for making diagram.

Surya Prakash M

Tech Lead Security

Easy to use

Creately has better options than Canva. It has great templates. it is a great product to use for visual org charts.

Jennifer D.

Initial Implementation

Great AI features

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

Karma A.

Business Manager

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.

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.

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 Using These Free Editable Templates

Doctor Appointment System

Edit Diagram

User Registration Flow Diagram

Edit Diagram

Use Case Model

Edit Diagram

Bank Loan Class Diagram

Edit Diagram

FAQs About the UML Diagram Maker

What are the key UML diagram categories?

UML, or Unified Modeling Language, is a standardized language for creating visual models of software systems. UML 2.2 defines 14 types of diagrams, divided into two categories. UML diagrams represent different aspects of a software system, and there are several different types of UML diagrams. Some of the key categories of UML diagrams include:

Structural diagrams: These diagrams show the static structure of a system, including its classes, objects, and relationships. Examples of structural diagrams include class diagrams, component diagrams, and deployment diagrams.
Behavioral diagrams: These diagrams show the dynamic behavior of a system, including the interactions and collaborations among its objects. Examples of behavioral diagrams include sequence diagrams, activity diagrams, and state diagrams.

Each type serves a specific purpose in visualizing system design. Creately’s UML diagram online tool includes templates and UML symbols for all these diagram types, making it the easiest way to model both structure and behavior.

What is the importance of a UML diagram?

UML diagrams can be a powerful tool for understanding, designing, and documenting software systems. They provide a common language for software developers and other stakeholders when discussing and working on a system. It helps to visually represent a system, including its actors, roles, classes, etc. A few other key benefits of using a UML diagram include

The ability to communicate more effectively about a system and its design. This helps ensure that everyone involved in a project understands the system and how it works.
Helps to identify potential problems or inconsistencies in a system’s design before it is implemented. This can save time and effort by allowing developers to address any issues early in the development process rather than dealing with them after the system has been built.
Helps to improve the efficiency and effectiveness of software development

Where can I find the symbols and components needed for UML diagrams in Creately’s UML diagram maker?

To get the required symbols and components:

Go to the plus sign at the canvas’s bottom left-hand corner.
Click the plus sign to expand and navigate to the shapes panel.
Click ‘All Shapes’ to open the complete shapes panel.
Search for UML or scroll down to locate it.
Select what you need, and the UML symbols and shapes will be added to the shapes panel for quick access.

How can I start creating a UML diagram?

First, identify the type of UML diagram that you want to create. Then go through our extensive list of UML diagram templates available to find what you need or dive right in to start designing from scratch. Here are a few tips to follow when creating a UML diagram in Creately.

Use the dedicated UML shapes library to customize or create your UML diagram.
Use dynamic connectors that can be changed through the quick toolbar menu.
Customize colors and text through the quick toolbar or use the shapes properties for more options.

How can I share my workspace with others for feedback?

You can export the UML diagram template as SVG, PNG, JPEG, or PDF to share your workspace with colleagues and stakeholders. If you want to provide edit access, go to the share button at the top left-hand corner to access the collaborators panel. Here include the email and select if they can edit or view it.

What is the best tool to create a UML diagram?

Creately is the best tool to create a UML diagram online. It offers an intuitive drag-and-drop interface, a comprehensive library of UML shapes and templates, real-time collaboration, sticky notes, and a notes panel for detailed annotations. Whether you want to build class diagrams, sequence diagrams, or use-case diagrams, Creately makes it easy to create UML diagrams online quickly and accurately, with seamless sharing and exporting options for your team.

What is the purpose of the UML diagram?

The purpose of a UML diagram is to visually represent the structure and behavior of software systems using the Unified Modeling Language (UML). Developers and architects use these diagrams to plan designs, illustrate code architecture, and explain how different components interact. UML diagrams can also model workflows and business processes beyond software. With Creately’s UML diagram online editor, teams can quickly create accurate diagrams that make complex systems easy to understand and communicate.

What are the events and signals in UML?

In UML, events describe occurrences that can affect the state of a system. There are four main types of events: signals, calls, time-based events, and change events. A signal represents an asynchronous message sent between objects, often used to model communication in distributed systems. Events typically trigger transitions from one state to another. Using Creately, you can map out signals and events clearly within state diagrams to better capture system behavior.

What is a trigger in UML?

In UML modeling, a trigger is the event that initiates a transition from one state to another within a state machine. Triggers often work with guard conditions (Boolean expressions that must be true for the transition to occur) and effects (the actions that result from the transition). With Creately’s UML diagram maker, it’s easy to add triggers, guards, and effects using standardized UML symbols to build precise state diagrams.

What are the common mistakes in UML modeling?

Some frequent mistakes in UML modeling include:

Using inconsistent notations or mixing diagram styles.
Overcomplicating diagrams with unnecessary details.
Drawing incorrect or ambiguous relationships between elements.
Misplacing objects, classes, or symbols.
Failing to maintain consistency across multiple diagrams.

Creately’s intuitive UML diagram features help users avoid these mistakes by relying on ready-to-use UML shape libraries, notation standards, and collaboration tools that keep diagrams accurate and consistent.