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 …

draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams

Our UML diagram generator is cloud-based, so you can create, save, and collaborate on your UML diagrams from anywhere, no matter what device, browser, or operating system you work from.

Create simply and freely UML diagrams from your browser thanks to PlantUML Web Server. Just enter a text diagram, and get the result in PNG or SVG format.

Whether you want to build class diagrams, sequence diagrams, or use-case diagrams, Creately makes it easy to create UML diagrams online quickly and accurately, with seamless sharing and exporting …

Aug 14, 2025 · For UML diagram creation, excellent free tools include Astah, Miro, EdrawMax, and Adobe Express, each offering distinct features and methodologies to enhance your diagramming …

Customize your UML activity diagrams using colors and connectors to map out processes clearly from start to finish. Get started in seconds with our pre-built UML templates.

Free online diagram editor. Create, edit and share UML diagrams with an intuitive interface. Support for PlantUML syntax, real-time preview, and collaboration features.

Here is an online UML tool that's both wonderfully easy to use and refreshingly intuitive - Visual Paradigm Online. With features like Resource Catalog, alignment guide and a rich set of formatting …

Design clean UML class diagrams online with our UML class diagram maker—free and AI‑powered. Add classes, members, stereotypes, relationships. Customize, zoom, and export or embed fast.