17 Best FREE UML Diagram Tools & Software (2023)

By : Alyssa Walker Alyssa Walker
Hours Updated

UML stands for Unified Modeling Language. It is a standard that is mainly used for creating object-oriented, meaningful documentation models for any software system present in the real world. It offers rich models that describe the working of any software/hardware system.

There are many tools available in the market for designing UML diagrams. Following is a curated list of the Top UML tools with popular features and the latest download links. This comparison list contains open-source as well as commercial tools.

Top Pick
Astah
Astah

Astah is an award-winning graphical modeling tool to create UML diagrams fast and easy for individuals and teams of all sizes. It works on Windows, Mac, Linux and iOS.

Visit Astah

Best UML Diagram Software & Tool (Open Source & Online)

Name Platform Free Trial Link
👍 Astah Windows, Mac, Linux and iOS 20 Days Free Trial Learn More
👍 EdrawMax Windows, Mac, Linux, Web and iOS 15 Days Free Trial Learn More
Lucidchart Android, Windows and iOS Lifetime Free Basic Plan Learn More
Adobe Express Android, iOS, Windows, Mac, Linux Lifetime Free Basic Plan Learn More
Creately Android, Windows and iOS Lifetime Free Basic Plan Learn More

#1) Astah

Astah is an award-winning graphical modeling tool to create UML diagrams fast and easy for individuals and teams of all sizes. It works on Windows, Mac, Linux and iOS.

It provides import and export options for PNG, EMF, SVG, JPEG, CSV, PDF, HTML, RTF, and XML. You get over 40 Free Plug-ins to add advanced functionalities. It also offers reverse engineering and code generation, document generation, and embedding diagrams into MS documents.

#1 Top Pick
Astah
Astah
5.0

Integration: Atlassian Confluence, JIRA, miro, PlantUML and Microsoft office

Supported Diagrams: UML, ER, Data Flow Diagram, Flowchart, Requirement Diagram, CRUD, MindMap

Multi-file Support: Yes

Free Trial: 20 Days Free Trial

Visit Astah

Features:

  • Model reusability: Classes you create in Class diagrams can be reused in Sequence diagrams or other diagrams, and changes are synced automatically.
  • Supported UML diagrams: Allows users to drill down into diagrams for more detail and offers diagrams such as Activity diagrams, Sequence diagrams, Statemachine diagrams, and others.
  • Integration: It integrates easily with Atlassian Confluence, JIRA, miro, plantUL, and more.
  • Programming languages: Astah supports programming languages like Java, C++, C#, and more.
  • Other features: Astah provides Intelligent diagramming, Traceability maps, Team Collaboration, Hyperlinks, and Text Notes. It also offers Drag and Drop, Print option, Merge, and exclusive control, and includes compare diagrams for team collaboration.
  • Support: It provides customer support via Chat, Email, and Contact form
  • Supported Platforms: Windows, Mac, Linux, and iOS
  • Price: Plans start at $5.99 a month
  • Free Trial: 20 Days Free Trial

Pros

  • It has a user-friendly interface for easy and fast UML 2. x diagram creation and development.
  • Astah can auto-create class diagrams.
  • It offers additional licensing such as perpetual and academic free and discounted licenses.

Cons

  • The copy-paste functionality does not work properly.
  • The insertion of information in the diagrams is not smooth; thus, you might have to keep going back to settings.

Visit Astah >>

20 Days Free Trial

#2) EdrawMax

EdrawMax is a UML builder software that helps you to make diagrams using ready-made symbols and templates. It allows you to import your drawings into file formats such as PDF, PPT, Word, and HTML.

It Supports PNG, JPG, ICO, SVG, PDF, Tiff, Excel,PowerPoint, Word, Visio, and HTML file formats for import and export. EdwardMax is a secure software as it offers 256-bit SSL encryption. This tool can automate design reviews and generate documents, helps you to share designs anytime, anywhere, and also offers a free plan with 20MB of cloud storage.

#2
EdrawMax
EdrawMax
4.9

Integration: Microsoft Visio, Dropbox, and Google Drive

Supported Diagrams: Flowchart, Mind Map, Org Chart, Gantt Chart, etc.

Multi-file Support: No

Free Trial: 15 Days Free Trial

Visit EdrawMax

Features:

  • Easy modeling: The tool provides an easy method for the transition from UML to domain-specific modeling. It lets you constantly add new features based on the feedback given by the users. EdrawMax also allows users to reuse provided representations and work in total transparency on both DSL and UML models.
  • Types of Diagram: This UML software helps you to create a Class diagram, Component Diagram, and composite structure diagram. Its good usability also gives the overall look and feel of a serious programming environment.
  • Select templates effortlessly: It offers pre-built templates for Marketing, Operating Models, HR, and Mind maps. Allows developers to embed modeling concept patterns, generation templates, and other abstractions in traditional code.
  • Integrations: This tool seamlessly integrates with Microsoft Visio, Dropbox, and Google Drive.
  • Programming languages: EdrawMax supports programming languages like C++ and Java
  • Other features: Provides Quick Access Toolbar, Ribbon, Canvas, Context Pane, Symbol Library, Gantt view, and Cloud Collaboration. It offers Version history, Drag and Drop, and Print options. You can also create a flowchart, mind map, UML, electrical diagrams, network diagrams, etc.
  • Support: It provides customer support via Chat, Email, and Contact form
  • Supported Platforms: Windows, Mac, Linux, Web and iOS
  • Price: Plans start at $89 a year
  • Free Trial: 15 Days Free Trial

Pros

  • This tool provides 280+ latest flowchart and diagram solutions.
  • It provides a user-friendly interface similar to MS Word.
  • This UML tool provides multiple diagram options like 20MB12

Cons

  • You get only 1GB of free cloud storage in the starting plan.
  • It cannot combine the existing templates.

Visit EdrawMax

15 Days Free Trial

#3) Lucidchart

Lucidchart is an HTML-5-based UML tool that also offers real-time collaboration capabilities. It is one of the best UML tools that allow you to create a simple flowchart to complex technical diagrams.

It supports CSV, SVG, PNG, JPG, and PDF file formats for importing and exporting options. You can work with the team on any device across various platforms. It also helps you to increase security and easily manage user accounts.

#3
Lucidchart
Lucidchart
4.8

Integration: Salesforce, Slack, AWS, Azure, Zapier, Quip and Asana

Supported Diagrams: UML, Class, Activity and Sequence

Multi-file Support: Yes

Free Trial: Lifetime Free Basic Plan

Visit Lucidchart

Features:

  • Versatile diagramming: It supports both structural and behavioral diagrams. Allows you to connect live data with your diagrams or import data to automatically build organization charts.
  • Types of templates: Offers pre-built templates for Brainstorm Ideas, Build Flowcharts, Design UI & Layouts, Develop Business Strategies, and more.
  • Integrations: This UML diagram tool seamlessly integrates with Salesforce, Slack, AWS, Azure, Zapier, Quip, and Asana.
  • Programming languages: It supports programming languages like Python, Java, and C++.
  • Other features: It provides Real-time collaboration, Automated diagramming, Enhanced security, Visio, Gliffy, and Omnigraffle import. You also get Multi-file support, and Drag and Drop functionality.
  • Support: It provides customer support through the Contact form and Chat
  • Supported Platforms: Android, Windows, and iOS
  • Price: Plans start at $8.34 a month.
  • Free Trial: Lifetime Free Basic Plan

Pros

  • Its free plan offers 25MB of cloud storage.
  • Lucidchart has AES-256 and TLS 1.2 encryption to provide your security.
  • It has a built-in shape library, so you can add professionalism to your diagrams.

Cons

  • No versioning is included in the basic plan.
  • Important features like team folders and customizable documents are only provided in the highest plan.

Visit Lucidchart >>

Lifetime Free Basic Plan

#4) Adobe Express

Adobe Express is a flowchart software that helps you design customized and streamlined flowcharts. It also allows you to save and share your flowchart diagrams. Adobe Express seamlessly integrates with Canvas LMS, and the free plan offers 2GB of cloud storage.

This tool supports MP4, MOV, MPEG, MPE, MPG, M2V, MPA, MP2, M2A, MPV, M2P, M2T, MTS, M4V, M4A, VOB, 3GP, AVC and JPEG file formats. It also helps you collaborate with your engineering team with ease and offers AES-256 encryption.

#4
Adobe Express
Adobe Express
4.7

Integration: Canvas LMS

Supported Diagrams: Flowchart

Multi-file Support: Yes

Free Trial: Lifetime Free Basic Plan

Visit Adobe Express

Features:

  • Customizable and simple: You can build a flowchart that can be reformatted for posters, infographics, emailers, and more. It is one of the best UML design tools, which has a straightforward and user-friendly interface for easy and fast development.
  • Build in just minutes: This is one of the best UML diagram tool that helps you instantly download or print your flowchart designs for home or office use. You can add animated stickers from GIPHY or apply a text animation for short-form graphic videos. This UML drawing tool helps system analysts to integrate the creation of data flow and business process diagrams.
  • Types of templates: Adobe Express offers pre-built templates for Birthday cards, brochures, Business cards, calendars, certificates, Educational infographics, Facebook covers, flyers, Graph, and Logos.
  • Programming languages: It supports programming languages like C++ and Javascript.
  • Other features: It provides Resize images instantly, Convert videos to GIFs, Trim and edit video clips, Crop video clips, and Image Resize. With Adobe Express offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through a Chat channel.
  • Supported Platforms: Android, iOS, Windows, Mac, Linux
  • Price: Plans start at $9.99 a month. 16% Discount on Yearly Payments.
  • Free Trial: Lifetime Free Basic Plan

Pros

  • It helps you resize your flowcharts in a fraction of the time.
  • You can use it to represent complex sales figures, statistics, and much more.
  • It offers the freedom to mix and match different color schemes and data layouts.

Cons

  • The web version is not user-friendly.
  • It does not provide enough help material.

Visit Adobe Express

Lifetime Free Basic Plan

#5) Creately

Creately helps you create UML modeling, design, and architecture with advanced technology. It also allows you to add notes, link models, and centralize design documents, and its free plan offers 100MB of cloud storage.

Using Creately, you get multiple diagram options and 100MB cloud storage, and it supports JPEG, PNG, BMP, GIF, ICO SVG, and PDF file formats. It also comes with AES-256 and TLS 1.2 encryption that guarantees protection.

#5
Creately
Creately
4.6

Integration: Google Drive, Slack, Confluence, Zapier, OneDrive etc.

Supported Diagrams: ER, UML, Class, Sequence, Use Case and Flowchart

Multi-file Support: Yes

Free Trial: Lifetime Free Basic Plan

Visit Creately

Features:

  • Advanced diagramming: You get advanced features such as 70 types of diagramming standards, customizable professional diagrams, and others. Tools like universal, full-text search help you quickly find specific nodes and information in large and complex UML diagrams.
  • Single source of truth: This tool has a single source of truth that provides data-driven visuals. It helps you organize it on Kanban boards, grides and timelines, attachments, files, and more.
  • Types of templates: Creately offers pre-built 8000+ professional templates for Marketing, Operations, Strategy, IT & Networking, HR, Education, Product and Engineering, and complete customization.
  • Integrations: This tool can seamlessly integrate with Google Drive, Slack, Confluence, OneDrive, Zapier, and Microsoft Teams
  • Other features: Provides Visual Workspaces, Custom Databases, Task Management, Multi-Player Collaboration, Wiki and Notes. You also get Version history, Multi-file support, Drag and Drop, and a Print option.
  • Support: It provides customer support through Email, Phone, and Contact Form
  • Supported Platforms: Android, Windows, and iOS
  • Price: Plans start at $6.95 a month. 40% Discount on Yearly Payments.
  • Free Trial: Lifetime Free Basic Plan

Pros

  • It provides real-time collaboration for team design sprints.
  • Creately offers an intelligent, standard-compliant UML shape.
  • You can visualize project objects, attributes, classes, actors, packages, etc., on a single connected workspace.

Cons

  • It does not offer enough choice of fonts.
  • The big canvases may seem challenging to navigate.

Visit Creately >>

Lifetime Free Basic Plan

#6) Visme

Visme is a tool that helps you to share powerful visual stories in the form of infographics, flowcharts, graphs, and other visual content. It provides multiple diagram options, and its free plan offers 2GB of cloud storage.

This tool helps you to create professional diagrams by creating flowcharts, diagrams, org charts, engineering designs, and more. Visme provides import and export options for TXT, CSV, Excel, MP4 MOV, JPEG, PNG, PDF, and DOC file formats. For security it offers AES-256, AES-192, AES-128-bit, DES-64-bit and 3DES-192-bit encryption.

Visme

Features:

  • Diagram building: Visme allows you to build professional-looking diagrams. It helps you to work together on diagrams from a web browser, from almost anywhere. Moreover, it lets you use flowcharts and diagrams for real-time data.
  • Modeling: This UML diagram application is a comprehensive software for professional modeling. It is a useful data, process, and engineering modeling tool.
  • Types of templates: Visme has pre-built templates for Brochures, Budgets, Calendars, Cards, Certificates, Decorations, Education, Flyers, Health, fitness, Invitations, and Letters.
  • Integrations: It seamlessly integrates with tools like Yammer, Splunk, and Secureworks.
  • Programming languages: This UML diagram tool supports programming languages like PHP, Python, C#, and ASP.NET.
  • Other features: Visme provides collaboration and sharing, Intelligent diagramming, User experience and features, Templates, stencils, shapes, and Accessibility. It also offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through Chat and Phone
  • Supported Platforms: Windows and Mac
  • Price: Plans start at $29 a month. 57% Discount on Yearly Payments.
  • Free Trial: Life Time Free Basic Plan

Pros

  • It helps you create high-quality mockups in just seconds.
  • Visme includes an AI image generator.
  • You get personalized training and onboarding.

Cons

  • The basic paid plan doesn’t offer privacy controls.
  • Its free plan has limited template options.

Visit Visme >>

Life Time Free Basic Plan

#7) Moqups

Moqups is an online tool that enables you to make flowcharts and UML diagrams with minimal effort. It allows you to drag and drop shapes to visualize any flow.

It provides multiple diagram options, and the free versions provide 25MB of cloud storage. For import and export options, it supports PNG, PDF, HTML, JPEG, PNG, GIF, SVG, and WEB file formats and also offers 2FA encryption for security.

Moqups

Features:

  • Wireframes and mockups: Moqups helps you build professional-looking wireframes for applications and websites without installing them. You can also move up your UX and UI mockups to high fidelity using its drag-and-drop feature.
  • Flexibility: With Moqups can collaborate easily with other people, and it includes numerous shapes and drawing templates and arrows. It allows you to work remotely, perform tasks within a single creative context and has a fast learning curve.
  • Types of templates: It offers pre-built templates for Wireframes and Mockups, Diagrams and Flowcharts, Charts and Graphs, and Business Strategy.
  • Integrations: This too Moqups seamlessly integrates with Drive, Dropbox, Box, Slack, Jira, and Confluence.
  • Other features: Provides Wireframe Tool, Flowchart Maker, Graph Maker, Extensive range of Fonts and styling options, and more. It also offers Multi-file support, Drag and Drop, and a Print option.
  • Support: It provides customer support through the Contact form
  • Supported Platforms: Windows
  • Price: Plans start at $9 per month, billed annually, and $12 a month.
  • Free Trial: 90 Days Free Trial

Pros

  • It lets you resize, rotate, and move shapes.
  • You can easily share your project link with stakeholders.
  • It helps you onboard collaborators instantly with its single intuitive interface.

Cons

  • Real time collaboration comes only with higher plans.
  • You can make only two projects in the free version.

Download link: https://moqups.com/

#8) ConceptDraw

ConceptDraw DIAGRAM offers a complete range of business graphic documentation solutions. These UML solutions offer business-specific add-ons which offer an extensive variety of workflow requirements.

This UML diagram tool empowers your communication processes and improves your presentation techniques. It provides multiple diagram options for cloud storage and offers protection using AES-256 encryption. This tool also offers import and export options for PNG, SVG, JPG, BMP, GIF, TIFF, PDF, HTML, VSD, and XML file formats.

ConceptDraw

Features:

  • Diagram: This software offers vector libraries, templates, and samples and helps you build network diagrams, flow charts, organizational charts, floor plans, infographics, and much more.
  • Drawing tools: ConceptDraw DIAGRAM v12 offers powerful and comprehensive drawing tools. It also offers pre-built templates for Calendars and Organizational.
  • Integrations: Using ConceptDraw, you can seamlessly integrate it with PowerPoint, ConceptDraw MINDMAP, Adobe Acrobat DC and ConceptDraw Project.
  • Programming languages: It supports programming languages like C, C++, C#, Java, Lisp, and Python.
  • Other features: ConceptDraw provides Custom Diagramming Solution Builder, Sophisticated Diagramming Tools, Format Tools, Hyperlinks, and Text Notes. It also has Multi-file support, Drag and Drop, and a Print option.
  • Support: It provides customer support via Ticket and Phone
  • Supported Platforms: Windows and Mac
  • Price: Plans start at $199 a month.
  • Free Trial: 21 Days Free Trial

Pros

  • The tool is an ideal suite for building plan software.
  • You can use very important business metrics and track them with live object technology.
  • It offers an extensive set of samples.

Cons

  • The graphics may sometimes take time or load or fail to load.
  • You cannot group the pages into sections.

Download link: https://www.conceptdraw.com/products/drawing-tool

#9) StarUML

StarUML is a UML diagram modeling tool. It is one of the best UML software that provides eleven types of diagram. StartUML 2 is compatible with UML 2.x versions.

It offers pre-built templates for Class diagrams and provides multiple diagram options for cloud storage. This tool also has import and export options for PDF, XML, PNG, and JSON HTML file formats.

StarUML

Features:

  • SYSML support: StarUML supports modeling with SYSML diagrams such as Objects, Use Case, Class, Sequence, Deployment, Activity, Timing diagram, and others.
  • Diagram: There is no limit to using this commercial software for evaluation. It also offers additional diagrams like Data Flow diagrams, flow charts, and Entity-Relationship diagrams (ERD).
  • Programming languages: It supports programming languages like C, C++, C#, Java, and Python.
  • Other features: StarUML provides Custom Uml Profile, Auto Update, Model-driven Development, Fast Modeling, Dark And Light Themes, and Code Markdown Support. It also comes with Multi-file support, Drag and Drop, and Print options.
  • Support: This UML diagram tool provides customer support through Email.
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Request a Quote from Sales
  • Free Trial: Lifetime Free Basic Plan

Pros

  • This tool is compatible with UML 2. x standard metamodel and diagrams.
  • It can quickly discover and install third-party extensions.
  • StarUML supports retina (high-DPI) display.

Cons

  • It does not support SVG, JPEG, PNG, and WMF formats.

Download link: http://staruml.io/

#10) Altova

Altova UModel is another useful UML tool that makes visual software design practical for any project. Visually design application models in UML, which can be generated using Java, C++, C#, or Visual Basic.

It provides multiple diagram options for cloud storage and supports JSON, XBRL, XSL, XML, XPath, XSLT, Excel, CSV, ISO, HTML, Text, PNG, RTF, and PDF for import and export. You also get strong security with AES-256 encryption.

Altova

Features:

  • Modeling: Altova has Intuitive Visual Modeling for all UML Diagrams and allows you to add hyperlinks to any element in any UML diagram. Its helper windows allow you to build your desired models. You can assign an element to a specific layer, and layers can be locked to prevent changes.
  • Types of templates: It offers pre-built templates for DITA, DocBook, NCAXML, NewsML, NITF, RIXML, DAISY, TEI, P3P, and XML Resume.
  • Integrations: Altova seamlessly integrates with tools like Visual Studio and Eclipse.
  • Programming languages: This tool supports programming languages such as Java, C++, C#, and Visual Basic.
  • Other features: It provides XML Editing & Validation, Project management support, Barcode support, Built-in Industry Standards Templates, and more. Altova also offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through the Contact form.
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Plans start at $155.42 for a one-time purchase.
  • Free Trial: 30 Days Free Trial

Pros

  • It supports all 14 UML diagrams.
  • This tool has a customizable alignment grid.
  • It offers unlimited undo and redo.

Cons

  • It has numerous pop-ups that can be frustrating.
  • This tool needs to offer better support with instant replies.

Download link: https://www.altova.com/umodel

#11) Visual Paradigm

Visual Paradigm is a software design tool that is tailored for engine software projects. This UML editor tool helps the software development team to model business information systems and development processes.

You get a free plan with 1GB of cloud storage and support JPG, PNG, SVG, TIFF, EMF, PDF, TIFF, XML, and DOC file formats. It also offers 256-bit SSL encryption for complete security.

Visual Paradigm

Features:

  • Types of diagrams: It provides use case diagrams, class diagrams, sequence diagram, communication diagram, activity diagram, state machine diagram, and many more.
  • Types of templates: Visual Paradigm offers pre-built templates for Social Media, Events, Business, Marketing, Documents, School, Personal, Infographics, Posters, and Gift Card
  • Integrations: It seamlessly integrates with Eclipse, NetBeans, IntelliJ IDEA, Visual Studio, and Android Studio
  • Other features: This UML diagram tool provides Visual Modeling, Enterprise Architecture, Business Analysis & Design, Project Management, Agile & Scrum Development, Online Diagram Tool, Spreadsheet Tool, and Team Collaboration. It also has Multi-file support, Drag and Drop, and a Print option.
  • Support: It provides customer support through the Contact form.
  • Supported Platforms: MacOS, Windows, iOS, and Linux
  • Price: Plans start at $6 a month.
  • Free Trial: 30 Days Free Trial

Pros

  • It offers a user story feature to capture and maintain users’ needs.
  • You get a complete tool for process analysis, system design, database design, and more.
  • All plans support team collaboration.

Cons

  • The starting plan doesn’t offer a use case description.
  • Only the higher tiers offer user story mapping and agile tools.

Download link: https://www.visual-paradigm.com/

#12) Draw.IO

Draw.IO is a free online UML tool. It is one of the best UML modeling software that allows users to create and manage the drawing easily these tools. A lot of the wide and early share is available with this tool.

It provides multiple diagram options for cloud storage. This tool supports PNG, JPEG, SVG, JSON, XML, CSV, and PDF file formats and offers firewall-based encryption.

Draw.IO

Features:

  • Diagram building: This free UML diagram tool allows you to save the model in your preferred location. It offers pre-built templates for diagrams, and they are present in the software design itself. There is also no limit on the number of sizes.
  • Integrations: It seamlessly integrates with Aha, Atom, Bioiocons, BookStack, Docstell, Foswiki, Grafana, Growi, JupyterLab, Lark, LumApps, Nextcloud, Nuclino, Redmine and Sandstorm.
  • Other features: Draw.IO provides Keep your diagram data secure, diagram wherever you want, and Collaborate in real-time with shared cursors, an Easy-to-use diagram editor, and Many advanced tools. You also get the Version history, Drag and Drop, and Print options.
  • Support: It provides customer support via Email and Phone
  • Supported Platforms: Android, MacOS, Windows, iOS, and Linux
  • Price: Plans start at $15 a month.
  • Free Trial: Lifetime Free Basic Plan

Pros

  • You can save your projects by connecting them to Google Drive.
  • It is a beginner-friendly software.
  • The diagrams are highly portable as this tool doesn’t require installation.

Cons

  • It needs some improvement in importing certain file formats.
  • You do not get dedicated support or proper tutorials to use this tool.

Download link: https://www.draw.io/

#13) GenMyModel

GenMyModel began as a UML tool, but today, it has expanded to cover also business modeling with Archimate and BPMN support. It offers a centralized model repository which allows easy and simultaneous model collaboration.

It is useful for presentations to management and project stakeholders and supports SVG, PNG, JPEG, XML, XSD, and PDF file formats. GenMyModel supports programming languages like C++ and Java. This tool also has multiple diagram options for cloud storage and offers AES encryption.

GenMyModel

Features:

  • Modeling and diagram: Helps you to combine the power of desktop modeling tools with a modern web solution. It offers pre-built templates for the design. You can integrate it with Jira and Confluence, and it lets you share your knowledge with versioning and access right management.
  • Diagramming-oriented: This tool helps boost model-based approach projects by making diagramming intuitive, fun, and predictive. You can use it to start off and then seamlessly scale as your business grows.
  • Other features: GenMyModel provides Modeling Toolkit, Cloud-native, Collaborative, Online repository, Multi-standards, and Effortless Documentation. It also offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through Ticket, Email and Phone
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Lifetime Free Web Version

Pros

  • All its information remains up to date for impact analysis and Documentation.
  • It has a light configuration; therefore, it is easy to use.
  • This tool offers Code-free customization.

Cons

  • It has limited export options.
  • This tool does not integrate with enough useful tools.

Download link: https://www.genmymodel.com/

#14) OpenText

OpenText earlier known as Microfocus, is a visual modeling tool that allows business and software development process to analyze and design software architecture. It provides multiple diagram options for cloud storage.

It provides import and export options for XDB, TIFF, WSF, JPEG, PNG, GIF, BMP, PDF, XLS, IXF, CSV, RTF, Excel, and XML. Visual Modelling Software also offers AES-256 and 2FA encryption.

Visual Modeling Software

Features:

  • Modeling: OpenText offers you to model enterprise architectures in such a way that requirements, architectures, and code are always in sync. It has Model-driven Architecture and data modeling systems and offers pre-built templates for Design and Report.
  • Livesource technology: This feature allows you to use programming language source code to manage elements and eliminate unnecessary work.
  • Integrations: It seamlessly integrates with Kubernetes, Microsoft Teams, LoadRunner, Git, IBM, and Jira
  • Programming languages: This visual modeling software supports programming languages like Java, C++, and Visual Basic.
  • Other features: OpenText offers Leading-Edge Modeling Platform, Unified Modeling Language, LiveSource Technology, Model Visualization, Synchronization, and Design Patterns. It also provides Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through Chat, Phone, and Contact form
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Request a Quote from Sales

Pros

  • It allows automatic document generation.
  • You can create and reuse proven industry-standard designs to deliver high-quality products.
  • It is a highly scalable software.

Cons

  • The UI design looks a little outdated.
  • It needs better Documentation and training.

Download link: https://www.microfocus.com/en-us/products/together/overview

#15) Sparx Systems

Sparx system is a diagram design tool for modeling, documenting, building, and maintaining object-oriented features. It is one of the leading vendors of innovative solutions based on the Unified Modeling Language.

It provides multiple diagram options, and the free version offers 2GB of cloud storage. It provides import/export options for XML, XMI, CSV, RTF, PDF, and HTML and offers 2FA encryption.

Sparx Systems

Features:

  • Performance: It has a powerful document generation and offers end-to-end traceability, and has pre-built templates for design, document, and code. Sparx Systems can load extremely large models within seconds, has a high-performance model repository, and provides effective global collaboration capability.
  • Flexibility: It is based on open source standards such as SysML, UML, and BPMN. You can use it to test and verify the behavior of the apps and debug them when needed, simulate behaviors, and also track, prioritize, and assign tasks.
  • Integrations: It seamlessly integrates with Application Lifecycle Management, Jazz, Jira & Confluence, Team Foundation Server, Wrike, Service Now, Autodesk, Bugzilla, SharePoint, and Dropbox
  • Programming languages: Sparx Systems support programming language like JavaScript, Java, C++, and C#.
  • Other features: This tool provides Source code roundtrip, Application visualization, Model-driven architecture, Debugging and visualization, and Automation. It also offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through Email, Phone, and Contact Form
  • Supported Platforms: MacOS, Windows, iOS, and Linux
  • Price: Plans start at $8 a month. 25% Discount on Yearly Payments.
  • Free Trial: 30 Days Free Trial

Pros

  • It lets you perform an impact analysis of the requested requirements.
  • You get over 1000 patterns for your project.
  • It provides perspective-based modeling.

Cons

  • The enterprise plan doesn’t offer on-call support.
  • The highest plan offers certain features as add-ons only.

Download link: https://sparxsystems.com/

#16) Gliffy

Gliffy is a free online drawing tool that provides support for drawing UML diagrams. It is one of the most widely used online diagramming applications.

It provides multiple diagram options for cloud storage and supports PNG, JPG, SVG, JPEG, PNG, VSDX, VDX, and GIF file formats. Gliffy also offers AES-256 and TLS 1.2 encryption.

Gliffy

Features:

  • Diagram building: This free UML tool offers the power of visual communication and collaboration. It has strong support for BPMP process models and allows you to draw a diagram with ease.
  • Types of diagrams: It allows you to create all 14 UML diagrams, such as class, use case, sequence, activity, state diagram, and others.
  • Integrations: Gliffy seamlessly integrates with Confluence, Atlassian, and Jira.
  • Other features: It provides Create with Ease, Collaborate Instantly, Share With Anyone, and Cloud-Fortified Collaboration. You also get Version history, Multi-file support, Drag and Drop, and a Print option.
  • Support: It provides customer support through a contact form
  • Supported Platforms: Windows and MacOS
  • Price: Plans start at $8 a month. 25% Discount on Yearly Payments.
  • Free Trial: 14 Days Free Trial

Pros

  • It allows the teams to collaborate and document within a few clicks.
  • You can create unlimited diagrams.
  • It offers a Google Drive plug-in.

Cons

  • Only enterprise plan offers team management feature.
  • The professional plan doesn’t offer version history and centralized security.

Download link: https://www.gliffy.com/

#17) Modelio

Modelio is the first modeling environment. The tool combines BPMN support and UML support. It is one of the best free UML tools that provide support for a wide range of models and diagrams. It is accessible to the user as an open-source UML tool for developing UML diagrams.

This tool seamlessly integrates with Eclipse and provides multiple diagram options for cloud storage. It supports PNG, EMF, JPEG, WMF, XML, GIF, and BMP file formats. Modelio also offers an XMI import and export feature that enables you to exchange UML2 models between various tools.

Modelio

Features:

  • Diagram: You can extend Modelio for any language, methodology, or modeling technique. It is a free and open-source HTML5 online flowchart software that helps you customize diagrams with new document elements.
  • Reuse existing elements: Modelio lets you reuse existing elements in your diagrams. You can simply press the CTRL button and activate this function while creating a new element.
  • Programming languages: Support programming language like C++, C#, Java and SQL
  • Other features: It provides UML Modeler, BPMN support integrated with UML, Java code generator, HTML model publishing, Extension system, and Scripting language support. This tool also offers Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support through the Contact form
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Free Download

Pros

  • It lets you can work on UML 2.5 models.
  • You can merge similar concepts within its repository.
  • It supports the latest ArchiMate 3.2.

Cons

  • It is suitable for small teams and individuals only.
  • The requirements traceability is basic.

Download link: https://www.modelio.org/

#18) Software Ideas Modeler

Software Ideas Modeler is a designing tool for drawing UML, SysML, ERD, ArchiMate, and flowcharts. It is one of the best free UML tools that allows you to create user stories and offers wireframe support.

It provides multiple diagram options for cloud storage. This tool supports DF, DOCX, RTF, HTML, ODT, PDF, BMP, PNG, JPG, GIF, TIFF, SVG, WMF, EMF, XMI, and TXT file formats. Software Ideas Modeler also offers security with AES-256 encryption and integrates with GIT.

Software Ideas Modeler

Features:

  • Modeling: This UML modeling tool offers easy Diagramming and Layout. Software Ideas Modeler tool offers you many predefined styles, making your diagrams more attractive. Offers pre-built templates for Source code and Documentation
  • Programming languages: Support programming languages like C#, VB.NET, Java, C++, Ruby, Action Script, JavaScript, PHP, Python, and SQL
  • Other features: This software provides Wireframing, Matrices, Auto scrolling, Configurable canvas, Diagram filtering, Source code parsing, and Styling. It also offers Version history, Multi-file support, Drag and Drop, and Print option.
  • Support: It provides customer support via Email
  • Supported Platforms: MacOS, Windows, and Linux
  • Price: Plans start at $62 a month.
  • Free Trial: Lifetime Free Basic Plan

Pros

  • This documented software has good maintainability.
  • It supports all 14 diagrams of UML 2.5.
  • This tool is intuitive and includes time-saving features.

Cons

  • It offers limited integrations.
  • Software Ideas Modeler has a high learning curve.

Download link: https://www.softwareideas.net/

FAQs

UML Diagram is a design standard mainly used for creating object-oriented and meaningful documentation models for any software system in the real world. It offers rich models that describe the working of any software/hardware system. UML stands for Unified Modeling Language.

If you want to learn about UML Diagram, here’s a free tutorial you’ll want to check out: UML Diagrams: History, Types, Characteristics, Versions, Tools

Following are some of the best UML modeling software:

You should consider the following factors while choosing the best UML diagram software:

  • It should allow you to create multiple types of diagrams
  • Easy-to-use user interface
  • Customizations offered
  • Features and functionalities offered
  • Collaboration features
  • Integration with other tools
  • Cross-platform support
  • Templates offered for easy creation of diagrams
  • Presentation features
  • Import-Export functionality to various file formats

Best UML Diagram Software & Tool (Open Source & Online)

Name Platform Free Trial Link
👍 Astah Windows, Mac, Linux and iOS 20 Days Free Trial Learn More
👍 EdrawMax Windows, Mac, Linux, Web and iOS 15 Days Free Trial Learn More
Lucidchart Android, Windows and iOS Lifetime Free Basic Plan Learn More
Adobe Express Android, iOS, Windows, Mac, Linux Lifetime Free Basic Plan Learn More
Creately Android, Windows and iOS Lifetime Free Basic Plan Learn More
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