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UML Diagram Tools

Last updated today

Need to create a UML diagram? UML diagram tool is a web-based and easy-to-use tool for making UML diagrams. It has all the tools you need such as shape libraries, sequence markup editor, and more. You can even save your diagrams and share them with others. Try a tool today!

UML Diagram Tools illustration

20 services ranked

Our ranking methodology

#

1

Lucidchart logo

Lucidchart

4.95

875 reviews

price starts:

$ 7.95

per month, $95.40 billed annually

Visit Website

price starts:

$ 7.95

per month, $95.40 billed annually

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Activity UML

UML Templates

Unlimited

Team Collaboration

Real-time

Export Formats

JPEG,

PNG,

PDF

#

2

Astah logo

Astah

4.93

10 reviews

price starts:

$ 5.99

per month, $71.88 billed annually

Visit Website

price starts:

$ 5.99

per month, $71.88 billed annually

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Activity UML

UML Templates

Limited

Team Collaboration

Real-time

Export Formats

JPEG,

PNG,

EMF,

SVG

#

3

EdrawMax logo

EdrawMax

4.76

200 reviews

price starts:

$ 245.00

One-time payment

Visit Website

price starts:

$ 245.00

One-time payment

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Behavior UML

UML Templates

Unlimited

Team Collaboration

Non Real-time

Export Formats

JPEG,

PNG,

PDF

#

4

yEd logo

yEd

4.73

11 reviews

Custom

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Activity UML

UML Templates

Limited

Team Collaboration

Real-time

Export Formats

JPEG,

PNG,

PDF,

SVG

#

5

Software Ideas Modeler logo

Software Ideas Modeler

4.58

1 review

price starts:

$ 69.00

per license

Visit Website

price starts:

$ 69.00

per license

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Behavior UML

UML Templates

Limited

Team Collaboration

Real-time

Export Formats

JPEG,

PNG,

PDF

#

6

SequenceDiagram logo

SequenceDiagram

4.54

4 reviews

Free

Drag-and-Drop Interface

UML Diagram Types

Activity UML

UML Templates

Limited

Team Collaboration

Non Real-time

Export Formats

PNG,

PDF

#

7

Cacoo logo

Cacoo

4.46

137 reviews

price starts:

$ 5.00

per month, $60.00 billed annually

Visit Website

price starts:

$ 5.00

per month, $60.00 billed annually

Drag-and-Drop Interface

UML Diagram Types

Structural UML,

Activity UML

UML Templates

Unlimited

Team Collaboration

Real-time

Export Formats

JPEG,

PNG,

PDF

#

8

PlantText logo

PlantText

4.16

1 review

Free

Drag-and-Drop Interface

UML Diagram Types

Structural UML

UML Templates

Limited

Team Collaboration

Non Real-time

Export Formats

PNG,

SVG,

TXT

You’re seeing 8 of 20 UML Diagram Tools

Frequently Asked Questions on UML Diagram Tools

What is a UML diagram tool?

A UML diagram tool produces diagrams of all the common diagrams in the UML. UML diagram tools provide a medium to develop and visualize their class models quickly. UML Diagram Tools can be broken down into various categories, from modeling tools that deal with models and analysis tools that depict systems’ behaviors.

Why do you need a UML diagram tool?

A UML diagram tool is needed since it is valuable during the conceptual or architectural design phase. It acts as one of many ways to express and visualize what a system might look like. A UML diagram helps to understand the structure and evolution from its perspective, which may give new insights for developers working on that project.

What are the core features of the UML diagram tool?

Drag-and-Drop Interface

The drag-and-drop interface feature in the UML diagram tool is an interface to make a file accessible from the context menu of a design element. Thus, the user can drag an object from another schema and drop it onto the diagram pane or into the drawing area. It helps to model a software system.

Multiple UML Diagram Types

Multiple UML diagram types contain elements for depicting a component hierarchy and dependencies between the components. It can be used to illustrate the dynamic relationship between different classes, as defined in the following two points. Different types of multiple UML diagrams exist, including sequence, dependency, precedence, and relationship.

UML Templates

UML template is a feature that allows users to generate diagrams using the same basic outline. This allows for a more efficient generation of layouts and diagram representations by sharing common content. The UML Template supports programmers or engineers to create new classes, objects, and conceptual frameworks for their programs or systems.

Team Collaboration

Team collaboration in the UML diagram tool allows creating a project for collaborating on design models. It is to help those involved with designing model-driven systems design their models collaboratively and then make it available online, editable by others working in the same organization, and still provide controlled access to other people outside of that organization.

Multiple Export Format

The UML diagram tool’s multiple exports enable you to export diagrams in various formats simultaneously. All features are exported to multiple formats automatically with different required settings. With this, you can export your sketched masterpiece in different image converter formats such as PNG, JPEG, BMP, ICNS, etc.

What are the types of UML diagram tools?

Sequence UML Diagram Tool

A UML sequence diagram tool means the tool is a device for producing diagrams that show the sequence in which tasks will be completed at a particular time and place. It includes diagram creator, diagram editor, and technical documentation generator. Also, it provides a clear representation of all sequential task dependencies.

Class UML Diagram Tool

Class UML diagram tools are used to design object-oriented systems. They are ideal for designing diagrams of classes and class relationships, displaying class objects and attributes, or outlining interfaces between an information system and its environment. Class diagrams show classes, interfaces, other abstractions like traits, enumerations, and objects.

Use Case UML Diagram Tool

Use case diagram tools are usually used in the software design process to specify what the software does. It is typically one of the first diagrams created during this process and is sometimes called a scope diagram. A use-case diagram visualizes the functional requirements that arise while using a system, application, or device.

State UML Diagram Tool

State UML diagram tool is a diagrammatic information system that captures the dynamic state of running systems using models. The purpose of a State UML Diagram Tool is to present and graphically represent different aspects of the system being documented like components, dependencies, data flow, etc.

Database UML Diagram Tool

A database diagram tool is typically designed to co-relate multiple databases and data sets. Data entry will be synchronized with databases in the background, which is efficient for the long-term monitoring of records. The aims are transparency to ensure accuracy and integrity and closed environments that do not leak information. Such tools work across enterprise boundaries.

Who needs the UML diagram tool?

Software Developer

UML diagrams are a visual way to define software, taking complexity and confusion out of the equation. Designing a large software product can be confusing for any developer, given the many details involved in such an undertaking. UML diagrams are visual ways to represent the structure and data flow within an application sans time and complexity.

Consultant

A consultancy firm will have to communicate with the client what they perceive as possible scenarios and how they can be solved. A UML diagram can also help convey technical, procedural, workflow, and object-oriented design concepts outwards for customers, partners, and developers who may not speak your language.

System Architect

The system architect needs the UML diagram tool to create flowcharts, sequence diagrams, and class diagrams representing various aspects of the designed system. System Architect is a modeling-centric enterprise-class product, empowering teams through collaboration and process efficiency.

Project Manager

A project manager will find the UML diagram tool very useful because it helps them visualize all of the dependencies between different project components. A project manager will use a UML diagram to plan and design a program. This might include identifying users, their goals, the methods to reach them, and business processes that support these goals.

What are the steps in choosing the best UML diagram tool?

Step 1:

Consider your needs and what you will use the diagram tool for.

Step 2:

Identify the software's purpose such as, your primary industry, your target audience's education level, developing whole systems or individual components, the complexity of the systems/components.

Step 3:

Determine which diagram type best fits the needs of your organization. Chances are, one style will suit all of your needs but may not go as far in certain areas. If this doesn't work for you, take another approach and identify other types that may work better for specific parts of the project - like state charts for behavior modeling.

Step 4:

Evaluate the robustness of both low-level and high-level features to determine whether it has all the functionality that satisfies your needs.

Step 5:

Read reviews on different resources.

Is there a free UML diagram tool?

Yes, the Free UML diagram tool online allows you to create diagrams. You can select from various diagram types, including class, use case, sequence, communication, and package/layer diagrams, with the added flexibility of customizing details such as colors and shapes for any object.

Are there any UML diagram tools that can be downloaded for free?

Yes, UML diagram tool free download is a piece of software that allows the user to draw diagrams of objects and their relations with each other for free. All created objects on the online UML diagram drawing tool are editable after being placed onto the canvas area, and changes made will be saved.

How does the online UML diagram tool work?

Different UML online diagram tools work in different ways, where the user has to draw out the elements on a template and then fill in the information once it's drawn. A free online UML diagram tool can be used without any limitations, costs not included.

What is the best UML diagram tool?

The best UML diagram tools will depend on your intention for using them if you are designing code. The best UML tools are those that you feel most comfortable using or the ones your company uses. The simpler the tool is to understand and use, the better it usually is.

Which UML diagram tool freeware should I choose?

A UML diagram tool freeware is open-source software designed to create object-oriented systems and document the design with a standard computer language. The best option for an open-source UML diagram tool freeware will depend on a few different factors, such as the type of diagram or who it's intended for.

What to choose when it comes to the free UML class diagram tool?

There are several options for the free class UML diagram tool. It all depends on what you need from the modeling process. The style and tools will be more important in the initial phases of the design process when focused on coming up with a better understanding of the problem domain, generating ideas, or designing different solutions.

What are the best practices for UML diagram tool use?

A UML diagram takes place on three levels: first at the level of design form, second at the level of organizational form, and third at the semantic or achievement form. The three levels have an important subsystem connection that is carried out to fulfill four purposes.

How does annotation work in the UML diagram tool?

When using UML diagram tools to create and edit diagrams, annotations are inserted into the model by adding notation elements called "annotations" to the model (usually placed at the lower left-hand corner). These annotations will display window border boxes for displaying their text content at runtime.

What are the advantages and disadvantages of the UML diagram tool?

The benefits of using a UML diagram tool are showing relationships in code and making it more readable visually. In addition, you don't have to write detailed documentation separately. On the other hand, the disadvantage of using a UML diagram tool is when it comes to objectivity, as the data can't be examined and assessed without being biased.

Is it possible to replace attributes in the UML diagram tool?

It depends on what type of diagram. There are limitations to the diagrams that can be created and modified under free tools, where some of these limitations might not apply in a paid professional layout tool. That said, there is loose potential to create your own UML or other enterprise-type diagrams.

What is the difference between annotated and unannotated UML diagrams?

The difference is that an annotated UML diagram tool lists statements such as inline comments associated with a class, member, or dependency. On the other hand, an unannotated UML diagram tool does not include inline comments. One benefit of using a compiler-annotated IDE is to find errors and warnings as soon as they happen.

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