Top Tools / February 5, 2023

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Top 28 UML (Unified Modeling Language) Diagram Tools

In order to better understand, update, maintain, or document information about the system, a UML diagram is a diagram based on the UML (Unified Modeling Language) that aims to visually describe a system together with its primary players, roles, actions, artifacts, or classes. UML diagram tools are software applications that support the creation, editing, and management of UML diagrams. These tools provide a user-friendly interface and a set of features that allow users to create UML diagrams in a fast and easy way. The tools can be used to generate code or reverse-engineer existing code. They also provide the ability to export diagrams in a variety of formats, such as PDF, image, and XML, and to import diagrams from other tools.

This curated list of UML diagram top tools will provide you with a tool that works best for you!

1. EdrawMax

Use pre-made symbols and templates to create diagrams with the aid of the UML builder programme EdrawMax. Your drawings can be imported into file types like PDF, PPT, Word, and HTML.

Key Features:

  • You can design a mind map, a flowchart, an electrical diagram, a network diagram, etc.

  • It has a user-friendly interface akin to that of Microsoft Word.

  • You may generate a Class diagram, Component Diagram, and Composite Structure Diagram with the use of this UML programme.

  • You can share designs anytime, anyplace with the aid of EdrawMax.

  • allows users to work in complete transparency on both DSL and UML models while reusing the offered representations.


EdrawMax pricing starts at $8.25/month.

2. AdobeExpress

The flowchart programme Adobe Express enables you to create streamlined and personalised flowcharts. Using this application, you can also store and share your flowchart diagrams.

Key Features:

  • assists you in quickly resizing your flowcharts.

  • You may create a flowchart that can be structured and resized for use in posters, infographics, emails, and other media.

  • aids in collaboration between you and your engineering team

  • For brief graphic videos, you can apply a text animation or animated GIPHY stickers.

  • It is among the greatest UML design tools, with a simple and approachable interface for quick and simple development.


Adobe Express pricing starts at $9.99/month.

3. Lucidchart

Lucidchart is an HTML-5-based UML tool with features for real-time collaboration. One of the best UML modelling tools, it enables you to build anything from straightforward flowcharts to intricate technical diagrams.

Key Features:

  • Work on numerous platforms and devices with your team.

  • enables you to import data to automatically create organisational charts or connect live data with your diagrams.

  • increases security and makes managing user accounts simple

  • provides pre-built templates for a variety of tasks, including developing business strategies, building flowcharts, designing user interfaces and layouts, and more.


Lucidchart pricing starts at $7.95/month.

4. Creately

With cutting-edge technologies, Creately assists you in creating UML modelling, design, and architecture.

Key Features:

  • gives a UML form that is clever and standard-compliant.

  • Use drag-and-drop tools to quickly add UML shapes to your canvas.

  • provides a single connected workspace where you may view objects, attributes, classes, actors, packages, etc.

  • enables real-time team design sprint collaboration.

  • You can rapidly locate certain nodes and information in huge and complex UML diagrams with the aid of tools like universal, full-text search.


Creately pricing starts at $5/month.

5. Visio

Popular chart and visualisation software is Microsoft Visio. Being a part of the office family, it is easily compatible with other Microsoft office programmes.

Key Features:

  • Visio enables you to construct flowcharts, diagrams, org charts, engineering designs, and more to create professional diagrams.

  • comprehensive modelling software for industry use.

  • It is a helpful tool for modelling data, processes, and engineering.

  • enables you to create diagrams that appear professional.

  • enables the connection of flowcharts and diagrams to live data.


Visio pricing starts at ₹360.00user/month.

6. Moqups

With the help of the web application Moqups, you can quickly create flowcharts and UML diagrams. To visualise any flow, you can drag and drop shapes.

Key Features:

  • Working with others is simple for you.

  • Sharing your project URL with stakeholders is simple.

  • includes several shapes and arrows in the drawings.

  • Shapes can be resized, rotated, and moved.

  • provides pre-built templates for business strategy, wireframes and mockups, flowcharts and diagrams, charts, and graphs.


Moqups pricing starts at $9.10/month.

7. ConceptDraw

ConceptDraw DIAGRAM offers a comprehensive suite of business graphic documentation tools. These UML solutions provide add-ons that are business-specific and that provide a wide range of workflow requirements.

Key Features:

  • Drawing tools that are robust and powerful are available in ConceptDraw DIAGRAM v12.

  • aids in strengthening your presentation skills and communication procedures.

  • The programme is the perfect complement to construction plan software.

  • Utilizing live object technology, you may track crucial business indicators.

  • provides pre-built calendar and organisational template


Contact the company for the details.

8. StarUML

A UML diagram modelling tool is called StarUML. One of the greatest UML programmes, it offers eleven different types of diagrams. UML 2.x versions are compatible with StartUML 2.

Key Features:

  • You may find and instal third-party extensions using this UML diagramming programme.

  • It is possible to test this commercial programme indefinitely.

  • provides pre-built Class Diagram templates.

  • It offers several diagram choices. online storage

  • supports the file types JSON, PNG, HTML, and JPEG.


StarUML pricing starts at $69/user.

9. Altova

Altova UModel is another useful UML tool that makes visual software design possible for every project. UML can be used to create application models, which can then be visually designed, in Java, C++, C#, or Visual Basic.

Key Features:

  • Visual modelling that is intuitive for all UML diagrams

  • You can construct the models you want using the assistance windows.

  • You can add hyperlinks to any element in any UML diagram with this tool.

  • A layer can be locked to prevent changes, and elements can be assigned to certain layers.

  • Pre-built templates are available for XML, DITA, DocBook, NCAXML, NewsML, NITF, RIXML, DAISY, TEI, and P3P.


Contact the company for the details.

10. Visual Paradigm

A software design tool made specifically for engine software projects is called Visual Paradigm. The software development team can model company information systems and development processes with the aid of this UML editing tool.

Key Features:

  • It provides a full toolkit, including those for process analysis, system design, database design, etc.

  • provides a user story tool to record and keep track of users' demands.

  • provides pre-built templates for social media, events, businesses, marketing, documents, schools, personal projects, infographics, posters, and gift cards.

  • Integrates seamlessly with Visual Studio, Android Studio, NetBeans, IntelliJ IDEA, and Eclipse


Visual Paradigm pricing starts at $99/month.

11. Draw.IO

A free online UML tool is Draw.IO. One of the greatest UML tools, it makes it simple for users to produce and manage drawings. This tool makes it possible to communicate information widely and quickly.

Key Features:

  • No restriction on the variety of sizes

  • The programme design itself includes templates.

  • You are able to save the model in your favourite location with their free UML diagram tool.

  • provides pre-built diagram templates

  • AHA, Atom, Bioiocons, BookStack, Docstell, FOSWiki, Grafana, Growi, JupyterLab, Lark, LumApps, Nextcloud, Nuclino, Redmine, and Sandstorm are all seamlessly integrated.


Contact the company for the details.

12. GenMyModel

GenMyModel was first designed as a UML tool, but it has now included support for business modelling with Archimate and BPMN. It provides a central model repository that makes simultaneous model collaboration simple.

Key Features:

  • Utilize versioning and access right management to share your expertise.

  • useful for management and project stakeholder presentations.

  • assists you in fusing the power of contemporary web solutions with desktop modelling tools.

  • provides pre-built design templates

  • works seamlessly with Jira and Confluence


Contact the company for the details.

13. Astah

Astah is a UML editor that incorporates mind mapping capabilities. One of the best UML tools available, it aids in visualising the core of your concepts prior to coding.

Key Features:

  • quicker to produce UML can be compared to Excel or non-UML drawing programmes.

  • Visualize the specifications, the functional specifications, and all the connections between them and the other model components.

  • Merge, exclusive control, and support for copy and paste.

  • seamlessly interacts with Jira, FreeMind, ClasHStamP, Confluence, and DSM

  • offers a free plan 2GB of online storage

  • It offers several diagram choices. 2GB of online storage

14. Visual Modeling Software

Microfocus is a visual modelling tool used in business and software development for software architecture analysis and design.

Key Features:

  • With the help of this platform, you can simulate corporate architectures so that requirements, architectures, and code are constantly in sync.

  • provides systems for model-driven architecture and data modelling

  • Livesource technology component provides pre-built templates for Design and Report that you can use to organise elements and cut down on unnecessary effort.


Contact the company for the details.

15. Sparx Systems

A diagramming tool called Sparx System is used to model, create, and maintain object-oriented features. It is one of the top suppliers of cutting-edge products built on the Unified Modeling Language.

Key Features:

  • aids in efficient project management

  • Repository for high-performance models provides end-to-end tracking

  • Powerful document generating provides pre-built design, document, and code templates


Sparx System pricing starts at $229/user.

16. Gliffy

UML diagrams can be drawn using the free online drawing programme Gliffy. One of the most popular online diagramming tools is it.

Key Features:

  • enables simple diagram creation

  • The power of visual collaboration and communication is provided by this free UML tool.

  • Support for BPMP process models is strong.

  • Easily connects with Jira, Atlassian, and Confluence

  • It offers several diagram choices. online storage


Gliffy pricing starts at $6/month.

17. Modelio

The first modelling environment is called Modelio. The programme combines UML and BPMN support. One of the greatest free UML tools, it supports a variety of models and diagrams. As an open-source UML diagram tool, it is available to users for creating UML diagrams.

Key Features:

  • Using Modelio's XMI import/export capability, you can transfer UML2 models between other tools.

  • One of the greatest free UML tools available, it allows you to export diagrams in SVG, GIF, or JPEG formats.

  • Any language, methodology, or modelling technique can be added to Modelio.

  • It is an online HTML5 flowchart tool that is free and open-source.

  • UML 2.5 models are available for use.


Contact the company for the details.

18. Software Ideas Modeler

A design tool for creating UML, SysML, ERD, ArchiMate, and flowcharts is called Software Ideas Modeler. One of the greatest free UML tools available, it supports wireframes and lets you develop user stories.

Key Features:

  • This UML modelling tool enables simple layout and diagramming.

  • Your diagrams will look more appealing thanks to the several predefined styles provided by the Software Ideas Modeler tool.

  • Software that is well-documented is easier to maintain.

  • provides pre-built source code and documentation template options.

  • interacts seamlessly with GIT


Software Ideas Modeler pricing starts at $63.69/month.


Sequence diagrams, class diagrams, and object diagrams are just a few of the UML diagram types that can produce. Additionally, teams can utilise to make mind maps, flowcharts, org charts, and many other types of diagrams. Power users and programmers are aware that using the keyboard is far quicker than using a mouse. Developers work more quickly with than they do with drag-and-drop diagramming products because of its keyboard-command-based interface. Additionally, offers syntactic help directly in the diagramming window in case you run into trouble.

Key Features:

  • Team collaboration: allows for real-time collaboration and communication among team members, making it easy to share ideas and work together on projects.

  • Customizable workspaces: Users can create and customize their own workspaces to fit their specific needs and workflows.

  • Integrations: integrates with a variety of tools and platforms, including Trello, Slack, and Google Drive, to streamline workflows and increase efficiency.

  • Advanced analytics: offers advanced analytics and reporting features to help users track performance and make data-driven decisions.

  • Mobile access: is accessible on mobile devices, allowing users to stay connected and productive while on the go.

Cost: pricing starts at $9.95/month.

20. Cacoo

A wide range of users can enjoy excellent diagramming experiences with Cacoo. With Cacoo's simple drag-and-drop user interface, the majority of users will be able to begin diagramming very soon. Real-time collaboration is another feature of Cacoo that enables teams to solve issues rapidly. To use Cacoo, you do not need to be an expert in UML. Every developer's needs might not be met by Cacoo. A broad user base is targeted by this drag-and-drop solution.

Key Features:

  • Diagramming and Wireframing: Cacoo allows users to create diagrams, wireframes, flowcharts, and other types of visual diagrams to help with planning and project management.

  • Real-time collaboration: Cacoo allows multiple users to work on a document at the same time, making it easy to collaborate with teammates and clients.

  • Templates and Shapes: Cacoo comes with a wide range of pre-built templates and shapes to help users get started with their diagrams, including flowcharts, wireframes, and mind maps.

  • Version History: Cacoo keeps track of all changes made to a diagram, making it easy to roll back to a previous version or compare changes over time.

  • Integrations: Cacoo can be integrated with other tools such as Google Drive, Slack, Jira, and Trello to streamline workflows and improve collaboration.


Cacoo pricing starts at $6/month.

21. Umbrello

Umbrello is a powerful tool for Unified Modeling Language (UML) diagramming. It is built on KDE technology, making it both user-friendly and feature-rich. Umbrello is particularly useful for software developers, as it supports both reverse engineering and code generation for C++ and Java. This allows developers to create detailed diagrams of their code, as well as generate new code from existing diagrams.

Key Features:

  • One of the key features of Umbrello is its support for both structural and behavioral diagrams. This means that it can be used to create a wide range of diagrams, including class diagrams, state diagrams, and sequence diagrams.

  • Additionally, Umbrello can import C++ code and export diagrams to a variety of other languages, making it a versatile tool for software development.

  • Umbrello also have a feature of Video Playback, which can help users to learn and understand the tool better.


Contact the company for the details.

22. UML Designer Tool

A UML designer tool is a software application that assists users in designing, modifying, and visualizing UML (Unified Modeling Language) 2.5 models. The tool enables the creation of all types of UML diagrams, which are widely used in software engineering to represent the structure and behavior of software systems.

Key Features:

  • Provides transparency for working with both DSL (Domain-Specific Language) and UML models.

  • Allows for the reuse of provided presentations, enabling more efficient design processes.

  • Implements the use of Component, Class, and Composite structure diagrams, providing a wide range of design options.

  • Enables users to work with DSL by using UML legacy models, making it easy to get started with the tool.


Contact the company for the details.

23. Umple

Umple is a powerful object-oriented modeling language that combines the use of text and diagrams to represent software systems. It is particularly useful for creating state diagrams and class diagrams, which are widely used in software engineering to represent the structure and behavior of software systems. Umple adapts to various programming languages such as JAVA, C++, and PHP, resulting in shorter, more readable lines of code.

Key Features:

  • Includes advanced modeling constructs such as Singleton pattern, keys, immutability, mixins, and aspect-oriented code injection to make UML more understandable for users.

  • Enforces referential integrity by supporting UML multiplicity, ensuring consistency and accuracy in the modeling process.

  • Supports multiple programming languages such as JAVA, C++, and PHP, allowing for a wide range of usage possibilities.

  • Provides a textual representation of UML models, making it easier to read and understand the code.

  • By combining text and diagrams, it makes the model more intuitive, readable, and maintainable.


Contact the company for the details.

24. Latino

Latino is an online platform that provides a suite of UML (Unified Modeling Language) tools for faster development of UML diagrams. It is based on UMLet, which is an eclipse plugin or standalone tool. With Latino, users can create UML diagrams quickly and easily, without the need for any additional software installation.

Key Features:

  • Allows you to export the diagram as XML or any other image file format such as Gif, JPEG, or SVG format, providing flexibility in sharing and presenting your diagrams.

  • Is an installation-free web application, making it accessible to users from any device with internet access.

  • Based on UMLet, a widely used and well-established UML tool.

  • Provides a simple and user-friendly interface for creating UML diagrams.

  • Online platform, making it accessible to users from anywhere.

  • Allows for easy sharing and collaboration on diagrams, making it a great tool for team projects and remote work.


Contact the company for the details.

25. Diagramo

Diagramo is an online open-source HTML5 software that enables users to create flowcharts easily. It is a powerful tool for creating diagrams and flowcharts, and it allows for easy download and installation on servers. Diagramo is a great option for both individual and team use, providing a simple and user-friendly interface for creating diagrams.

Key Features:

  • Saves diagrams as images, allowing for easy sharing and presentation.

  • Focuses specifically on flowcharts, making it a great tool for process and workflow diagrams.

  • Offers lifetime support and storage, ensuring that users have access to the software and their diagrams even after a long period of time.

  • Open-source, allowing for customization and integration with other tools.

  • Easy download and installation on servers, making it accessible to users from anywhere.

  • HTML5 based, which makes it accessible from any browser and any device.

  • Provides support and collaboration feature which is helpful for team projects.


Contact the company for the details.


BOUML is a powerful UML (Unified Modeling Language) diagram designer that is programmed in Qt and C++. It is a versatile tool that allows users to specify and generate code in various programming languages such as C++, Java, Idl, Php, Python, and MySQL. This makes it a great tool for software developers and engineers who need to create and work with UML diagrams.

Key Features:

  • Supports code generation, reverse engineering, and is multilingual, making it a versatile tool for software development.

  • Runs on Windows, Linux, and MacOS X, making it widely accessible to users.

  • Very fast, does not require much memory to handle thousands of classes, which makes it efficient and easy to work with large projects.

  • Programmed in Qt and C++, ensuring a high level of performance and stability.

  • Provides a wide range of code generation options, allowing users to work with a variety of programming languages.

  • User-friendly interface, which makes it easy to navigate and use for both beginners and experts.

  • It's a free and open-source tool

  • It has a large community of users and developers which ensures regular updates and support.


Contact the company for the details.

27. Dia

Dia is an open-source, general-purpose drawing tool that is licensed under GPL. It is a powerful and versatile software that enables users to create a wide range of diagrams, including flowcharts, UML diagrams, network diagrams, circuit diagrams, and many more. It allows for the incorporation of a subset of Scalable Vector Graphics (SVG) while writing a simple XML file for drawing new shapes, making it highly customizable.

Key Features:

  • Incorporates special objects that help in drawing ER diagrams, UML diagrams, network diagrams, flowcharts, and many other types of diagrams, making it a versatile tool for software development, engineering, and other fields.

  • Open-source and GPL licensed, allowing for customization and integration with other tools.

  • It allows the incorporation of SVG, which is a standard format for vector graphics, allowing for high-quality output and the ability to scale diagrams without losing quality.

  • Simple and user-friendly interface, making it easy to use for users of all skill levels.

  • Support for many different types of diagrams which makes it useful for various fields.


Contact the company for the details.

28. MagicDraw

UML diagrams, SysML, BPMN, and UPDM modelling are done in Magic Draw to facilitate the team's dynamic collaboration. Business analysts, software analysts, programmers, and QA engineers are the target audience for this tool. It makes it easier to analyse and create object-oriented databases and systems.

Key Features:

  • round-trip support for.NET, XML Schema, DDL creation, database schema, and programming languages (J2EE, C#, C++, COBRA IDL).

  • The idea of reverse engineering is included.

  • It is a language with a defined domain.

  • It is a type of model decomposition that divides the primary project into a number of unique independent components.

  • It includes model reworking to strengthen the current model.


Contact the company for the details.

Things to consider while choosing UML Diagram Tools

  • Compatibility: The tool should be compatible with the software development environment you are using. It should be able to integrate seamlessly with your existing tools and workflows.

  • Features: The tool should have the features you need to create the types of diagrams you will be working with. This includes support for all the UML diagram types, such as class diagrams, use case diagrams, sequence diagrams, etc.

  • Ease of use: The tool should be easy to use and intuitive. It should have a user-friendly interface and should be easy to navigate.

  • Customizability: The tool should allow for customization of diagrams, such as the ability to change colors, font sizes, and line thicknesses.

  • Collaboration: The tool should provide collaboration features, such as the ability to share diagrams with others, track changes, and work on diagrams simultaneously with team members.

  • Versatility: The tool should provide the ability to create different types of diagrams, like business process diagrams, flowcharts, and entity-relationship diagrams.

  • Export/Import: The tool should provide the ability to export diagrams in a variety of formats, such as PDF, image, and XML. It should also provide the ability to import diagrams from other tools.

  • Price and Licensing: The tool should be affordable and offer flexible licensing options.

  • Technical support: The tool should have good technical support and documentation to help you with any issues you may encounter.


What is UML (Unified Modeling Language)?

UML is a standardized way of visualizing and describing the structure and behavior of software systems. It provides a set of diagram types, such as class diagrams, use case diagrams, and sequence diagrams, that can be used to model and document software systems.

What are some common UML diagram types?

Common UML diagram types include class diagrams, use case diagrams, sequence diagrams, state diagrams, activity diagrams, and component diagrams.

What are some popular UML diagram tools?

Some popular UML diagram tools include Visio, Lucidchart, StarUML, Enterprise Architect, and IBM Rational Software Architect.

What are some things to consider when choosing a UML diagram tool?

When choosing a UML diagram tool, you should consider compatibility with your software development environment, features, ease of use, customizability, collaboration, versatility, export/import, price and licensing, and technical support.

How can UML diagrams be used in software development?

UML diagrams can be used throughout the software development process, from requirements gathering and design to implementation and maintenance. They can help to communicate design decisions, document software systems, and identify potential issues before they arise. UML diagrams can also be used to generate code or to reverse-engineer existing code.

Top 28 UML (Unified Modeling...

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