UML diagram tool
Create every common UML diagram - class, sequence, use case, activity, state, component, and deployment - with correct notation. Write Mermaid, drag shapes, or let AI draft it from a description.
Step by step
Launch Atlas Diagram Studio and pick a UML diagram type - class, sequence, use case, activity, state, or component.
Add classes with attributes and methods, draw associations, inheritance, aggregation, and composition - or the equivalent for other UML types.
Describe the model in plain English, paste Mermaid classDiagram syntax, or import code structure to skeleton the diagram.
Co-edit with your team in real time and export to PNG, SVG, or PDF for the design doc.
Why Atlas Diagram Studio
Most online diagram tools are throwaway. This one has an AI engine, real-time collaboration, and lives inside the workspace where the rest of your work already is.
Describe your UML diagram in plain English - or paste Mermaid - and Atlas generates an editable, validated diagram you can refine, instead of starting from a blank canvas.
Invite your team and build the UML diagram together with live cursors, comments, and version history - nobody emails a screenshot back and forth.
Unlike a one-off uml diagram tool, this lives inside Atlas - so the diagram attaches to the project, task, or doc it describes and is searchable alongside the rest of your work.
FAQ
Ready when you are
Atlas Diagram Studio makes every diagram - flowcharts, UML, ERDs, architecture, mind maps - with AI text-to-diagram and real-time collaboration, inside an all-in-one workspace. Start free.