Online UML modeling software

UML diagram is a standard language for visual modeling of software-intensive systems, used to describe the structure, behavior and interaction of the system. ProcessOn can draw 14 types of UML diagrams online, including sequence diagrams, class diagrams, use case diagrams, activity diagrams, state diagrams, etc. It supports AI to generate UML diagrams in one click, and there are also a large number of high-quality UML templates for cloning, so it is stress-free to get started.

Get started



Use Case Diagram

Describes system functions from the user's perspective, including system participants, use cases, and the interactions between them. Used to analyze high-level system requirements.

Get started



Timing diagram

Describes the interactions between objects in the system, emphasizing the time sequence in which the interactions occur. Used to show how objects interact with each other.

Get started



Class Diagram

Describes the static structure of classes in the system, including class attributes, methods, and the relationships between them (such as inheritance, association, dependency, etc.). Used to have a comprehensive understanding of the system before writing code correctly.

Get started



Activity diagram

Describes the business processes of a system and the control and data flow relationships between processes. Used to represent a series of sequential or parallel activities.

Get started



Statechart

Describes the life cycle of objects in the system, including the states of the objects and the conditions for transitioning between states. Statechart diagrams help understand the behavior of objects in different states.

Get started



Collaboration diagram

By paying attention to the access relationships between objects, you can clearly see which objects have message passing.

Get started



Deployment diagram

Describes the hardware structure of the system, including the system nodes (such as computers, devices, etc.) and the communication relationships between them. Used to model the physical deployment of the system.

Get started



Object Graph

It shows the relationship between objects at a certain moment, reflecting the static process of the system. It is used to describe the specific situation of the system at a specific moment, especially the objects and their relationships.

Get started



Component Diagram

Describes the physical structure of the system, including the system's software components and the relationships between them. Used to model software components and their relationships to each other.

Get started



Package Diagram

A combination of model elements represented by a symbol similar to a folder. It is used to describe the organizational structure of packages in the system and the elements contained in the packages and the dependencies between them.

Get started



Rich UML graphics library

It provides nearly 100 graphic symbols, including UML general, UML use case diagram, UML sequence diagram, UML class diagram, UML state diagram, UML activity diagram, UML deployment diagram, and UML component diagram, with 26 built-in theme styles, allowing you to quickly draw professional and good-looking UML diagrams.

Get started



AI automatically generates UML diagrams

You only need to enter a sentence as prompted, and ProcessOn can help you automatically generate UML diagrams such as sequence diagrams, class diagrams, state diagrams, etc. You can also continue to edit the content and beautify the style of the generated results, greatly improving work efficiency.

Get started



ProcessOn UML Diagram Product Highlights

Online collaboration

Drawing UML diagrams online is simple and convenient, supports collaborative creation among multiple people, and allows you to set sharing links for real-time information transmission.

Compatible with multiple formats

UML diagrams can be exported to PNG, VISIO, PDF, SVG and other formats, and can be imported into VISIO format files

Cloud Storage

UML files are stored in real time, synchronized in the cloud between different terminals, historical versions can be traced, and data security is guaranteed.

Get started



How to draw UML diagram

Create a new UML diagram, or create a new flowchart first, then add 'UML' graphic symbols to the drawing area, or directly clone the publicly released UML diagram template

Drag and drop graphics, elements, and symbols from the UML graphics library to the drawing area for direct use

Label the content and add text descriptions to each graphic and element to indicate their identity

Style beautification: make the graphics consistent in size through 'match width and height' in 'match size', and align and arrange the graphics evenly through 'align distribution'.

Establish relationships and use symbols such as straight lines and arrows to identify the relationship between each graphic

In this way, a professional UML diagram is drawn. You can publish it to the ProcessOn template community or share it with your colleagues and friends.

Get started



UML Diagram FAQ

How to add UML graphics library

Click 'More Graphics' on the left side of the drawing area, select the 'UML' graphic symbol, and click 'Confirm' to see it in the drawing area on the left.



How to modify UML graphic style

Click 'Style' on the left side of the drawing area. ProcessOn provides 26 styles and supports one-click modification of the overall color style.



How to modify the graphic arrangement relationship

Select two or more graphics at the same time and use the buttons next to 'More' in the top toolbar to modify the arrangement, distribution alignment, size matching and combination relationship.



How to modify the UML diagram page style

Click 'Page Style' in the upper right corner to set it up, which supports modifying the canvas, grid, line jumps, and watermarks.



How to add UML diagram data attributes

Click 'More' and 'Data Properties' in the upper right corner to set data properties, data types, and property values.



How to beautify UML diagrams with one click

The 'Beautify' button in the upper left corner can be used to beautify the graphics and lines with one click, making them more beautiful and neat.



How to restore the historical version of UML diagram

ProcessOn automatically saves history records to the cloud. Click 'File' - 'History' in the upper left corner, select the version you want to restore, and confirm the restore.

