umlet ☆

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Description:
This UML tool aimed at providing a fast way of creating UML diagrams

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: uml modeling diagrams developer-tools java

Install: brew install umlet

About:
Umlet is a free, open-source UML tool that focuses on speed and simplicity for creating UML diagrams. It allows for fast drawing and code generation from diagrams, and can be integrated into other tools via command-line interface. The tool supports various UML diagram types including class, sequence, and state diagrams.

Key Features:

Fast drawing and editing of UML diagrams
Code generation from diagrams and vice versa
Standalone application with no installation required
Command-line interface for integration into build processes
Supports multiple diagram formats including UML and ERT

Use Cases:

Quickly sketching software architecture for documentation
Generating boilerplate code from class diagrams
Collaborating on system design with team members
Integrating diagram generation into CI/CD pipelines

Alternatives:

PlantUML – PlantUML uses text-based definitions for diagrams, while Umlet provides a more graphical, drag-and-drop interface.
draw.io – draw.io is a general-purpose diagramming tool with cloud integration, whereas Umlet is specifically optimized for UML with code generation capabilities.

Version History

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