Online UML diagram maker

Make UML diagrams effortlessly, draw inspiration from a vast collection of templates, all within an intuitively user-friendly interface – for free.

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Your easy-to-use UML diagram tool

Rich templates, icons, symbols
EdrawMax has tons of templates, icons, and symbols available. Find a perfect match to your task needs. All of them are easily customizable for your UML diagrams.
Customize your diagram with ease
Adding symbols is just dragging and dropping into the canvas. Plus, each diagram has its separate library for symbols. So, save time, choose UML Diagram symbols, and narrow your search for the correct symbol.
Sync work in a unified workspace
Always keep in touch with your team through EdrawMax cloud services. Collaborate on lengthy projects by saving and sharing files. You can utilize the sharing permission feature to allow specific access to distinguished individuals.
Export your diagram in various formats
You can export your files in many formats, including Visio, PDF, JPG, PNG, and SVG. This enables you to easily share your work with team members, even if they don't have EdrawMax.

UML diagram tool for everyone

Software Engineers
Software engineers create and record software systems and development processes using UML diagrams.
Systems Analysts
Systems analysts use UML to communicate and visualize system requirements, which improves project clarity.
Project Managers
Project managers use UML to plan and track the development of projects while ensuring that requirements are met.
Quality Assurance Testers
Testers utilize UML to comprehend system design and create thorough test cases.
Business Analysts
Using UML to model business processes, business analysts improve coordination between stakeholders and developers.
Database Designers
Database designers utilize UML to build effective data models that correctly represent the demands of applications.

Why teams choose EdrawMax?

Seamless Teamwork
EdrawMax facilitates real-time collaboration, allowing team members to work together on diagrams and share feedback instantly, fostering teamwork, and accelerating project progress.
Enhanced Efficiency
With its intuitive interface, pre-made templates, and extensive symbol libraries, EdrawMax enables teams to create professional-quality diagrams quickly, saving time, reducing effort, and increasing productivity.
All in One
EdrawMax allows for making 210+ types of diagrams including flowcharts, mind mapps, Gantt charts, timelines and more, streamlining workflows and eliminating the need for multiple software, enhancing convenience.
Improved Communication
Use visually compelling diagrams to convey complex ideas, facilitating clear and concise communication within teams and with stakeholders, boosting understanding and decision-making processes.
What is
a UML diagram?

A UML (Unified Modeling Language) diagram is a visualization tool used in software engineering to provide a graphical representation of a system. Developed in the 1990s, UML has become a standard way to visualize the design of a system.

UML diagrams are divided into two main categories: structural diagrams and behavioral diagrams. Structural diagrams represent the static aspects of a system, such as its architecture and design. Examples include class diagrams, object diagrams, and package diagrams.

Behavioral diagrams, on the other hand, depict the dynamic aspects of a system. They show how objects interact and change over time. Common behavioral diagrams include use case diagrams, sequence diagrams, and activity diagrams.

Overall, UML diagrams are essential tools for software developers. They aid in understanding, designing, and documenting software systems and processes, providing a universal language for software development that promotes clarity and understanding across different team members and stakeholders.

does UML work?

Unified Modeling Language (UML) works as a powerful tool in software development and system design, primarily serving as a standard way to visualize complex systems. It offers a range of diagram types to model different aspects of a system, from structure to behavior.

The first step in utilizing UML involves choosing the appropriate diagram type based on what aspect of the system you need to model. For structural representation, diagrams like class or package diagrams are used, which show how different parts of the system relate and interact. These diagrams are crucial for planning the architecture of the system.

For dynamic aspects, such as workflows or processes, behavioral diagrams like sequence or activity diagrams come into play. These diagrams depict the flow of operations, helping to understand and communicate how the system will function in real-time scenarios.

In practice, UML diagrams are used throughout the software development lifecycle. They aid in conceptualizing the design, guiding the development process, and providing clear documentation. The standardized nature of UML makes it a universal language in software development, facilitating clear communication among developers, designers, and stakeholders. This clarity and efficiency in communication are essential, especially in large or complex projects.

to use the UML diagram

Using UML (Unified Modeling Language) diagrams offers several benefits in software development and system design. One primary reason is their ability to provide a clear and consistent visual representation of complex systems. This visual aspect makes it easier for developers and stakeholders to understand the system's architecture, including its classes, relationships, and processes.

Another reason to use UML diagrams is their versatility. UML is not tied to any specific programming language or methodology, making it a universally applicable tool across various projects. This universality allows for seamless integration into different stages of the software development lifecycle, from conceptualization to documentation.

UML diagrams also facilitate better communication among team members, particularly in large or distributed teams. The diagrams serve as a common language, ensuring that everyone involved has a shared understanding of the system's structure and behavior. This shared understanding is crucial for collaboration and efficient problem-solving.

Lastly, UML diagrams are essential in the planning and documentation phases of a project. They provide a detailed overview of the system, which helps in identifying potential issues early in the development process. This proactive approach can save time and resources by preventing costly revisions later in the project lifecycle.

Types of UML diagrams

UML Class Diagram
UML Object Diagram
UML Case Diagram

Six steps to create a UML diagram

  • Determine the purpose and scope of the UML diagram you want to create.
  • Choose the appropriate UML diagram type that aligns with your objectives.
  • Specify the components, relationships, and attributes relevant to your system.
  • Use UML modeling tools to build the diagram, adding elements and connections.
  • Arrange components logically to enhance clarity and understanding.
  • Add descriptions and review the UML diagram for accuracy and completeness.

What our users say

Loke Tamara
I use EdrawMax to create all of my diagrams and maps, and the customization services are amazing and simple to use. Unfortunately, I had some troubles with the upgrade last month, but customer service fixed it in two hours.
The symbols Edrawmax provides are very useful! It saves my time finding icons, and if I need more, I can get to the iconfont icons. For map creation, your work has finished half when solved the problem of map icons, and many of the icon libraries are in line with international standards.
Actually, I bought Edrawmax for creating other diagrams. But one day, I had the need for UML diagram. I tried it and found that I was pleasantly surprised. The UML templates and icons are very complete, and easy to use.

FAQs about UML diagram makers

  • There are more than 20 UML diagram types. All are ready for you to design, modify, visualize, and implement complex software structures.
  • Access UML diagram symbols by typing "UML" in the searcher of the symbol library while you are on the canvas. Or you can open the pre-defined symbol library and select UML diagram symbols from the list of categories.
  • You can build a UML diagram from scratch by adding and removing symbols on the canvas. All you need to do is drag and drop the symbol of your choice. Moreover, the UML diagram symbols are specifically catered to meet industry standards.
  • All published UML diagram templates on the Templates Community are free, except the pre-made examples. All you need is to download and personalize the template of your choice.
  • Yes, EdrawMax has a free version for you to design all 14 types of UML diagrams. In this version, you get access to editable templates and free symbols. You will love using its intuitive yet helpful interface. So, give it a shot.
  • In software engineering, there are a total of 14 standardized UML diagrams used for various purposes.
  • Among the UML diagrams, the class diagram is the most frequently used in software engineering. 8'Is a flowchart a UML diagram?
  • Yes, UML is widely employed for system design and modeling, playing a crucial role in software engineering projects to represent complex systems comprehensively.