With UML Lab you can draft and describe your software structure with UML diagrams in real time. An intuitive modeling tool for UML class diagrams, components, and profiles—including context assist, code completion, in-place editing, model exploration and automatic layouting.

Visual Paradigm Online (VP Online) Free Edition is a FREE online drawing software that supports Class Diagram, other UML diagrams, ERD tool and Organization Chart tool. It features a simple yet powerful editor that allows you to create Class Diagram quickly and easily.

SmartDraw can generate a visual representation of your code from your repository on GitHub or your local computer. You can create a UML class diagram without any drawing at all. Visualize your classes and their properties automatically whether …

UML Lab's default editor for UML class diagrams is the UML Lab class diagram editor. It visualizes the elements of a class diagram as specified in the UML Superstructure Specification. Open the Package Explorer. Then, locate and double-click one of the class diagrams (.umlcd file).

draw.io is free online diagram software. You can use it as a flowchart maker, network diagram software, to create UML online, as an ER diagram tool, to design database schema, to build BPMN online, as a circuit diagram maker, and more. draw.io can import .vsdx, Gliffy™ and Lucidchart™ files .

A class diagram is a visual representation of your software's basic architecture. It shows all the basic building blocks, their attributes, operations, and relationships between them. SmartDraw can help you make a class diagram automatically using a local repository or a repo on Github.

Empower your development team with Cacoo's UML diagram tool. Visualize software architecture, communicate ideas clearly, and accelerate development cycles.

Organize and structure your system with ease using Edraw.AI’s UML class diagram maker. Visualize dependencies, object relationships, classes, and attributes — all in one tool. Get started, it's free!

A UML model may have several class diagrams that show different parts of the model. So, if a project already contains a UML model that was created earlier (cf. Create a UML model) you may add additional class diagrams.

Creately is an intuitive class diagram tool that comes with standard shape libraries and templates not only for class diagrams but also for all UML diagram types. It has easy-to-use drag and drop tools and powerful collaboration capabilities that allow remote or hybrid teams to get together and work on designing systems productively.