How to Remove the StarUML Background Watermark ?
The StarUML Watermark Problem
StarUML is arguably one of the best—if not the best—UML modeling software available today. However, for many users, there is a distinct downside: the distracting background watermark found in the unactivated version.
Currently, removing this background without damaging the diagram is surprisingly difficult. Even advanced AI tools struggle to distinguish the watermark from the complex diagram lines effectively.

The Solution
Fortunately, a solution exists thanks to the open-source community. A developer known as seeren has created a Java-based tool specifically designed to fix this issue cleanly.
You can find the project here: StarUML Watermark Remover
How to Fix It
Follow these simple steps to clean up your diagrams:
- Clone the Repository: Download or clone the tool from the link above.
- Export Your Diagram: In StarUML, export your diagram as an SVG file.
- Run the Fix: Navigate to the cloned folder in your terminal and run the command shown below:

The Result
After running the tool, your diagram will be converted to a pristine format, free of the background watermark, as seen here:
