Runs in your browser — nothing is uploaded
How to use UML Diagram Maker
Pick a relationship type, then drag between classes — the notation is drawn correctly for you.
- Start from a class, use case or sequence template.
- Edit names, attributes and methods in the Properties panel.
- Choose a relationship under “New links”, then drag from the blue + to another element.
- Export PNG, SVG or PDF for documentation.
Questions
Which relationships are supported?
Association, directed association, inheritance, realization, dependency, aggregation, composition, and synchronous and return messages.
Is anything uploaded?
No. The editor, your photos and every export run in your browser. An unfinished project is kept for recovery on this device only, and “Save project” downloads a file you control.
Are there keyboard shortcuts?
Yes: V select, H pan, Ctrl+Z / Ctrl+Shift+Z undo and redo, Ctrl+C / Ctrl+V copy and paste, Ctrl+D duplicate, Delete removes, arrow keys nudge (Shift for 10 px), + and − zoom and 0 fits the view.