DiagramLab - Mermaid/PlantUML – Native macOS app for Mermaid and PlantUML diagrams

Summary: DiagramLab is a macOS app that converts Mermaid and PlantUML code into visual diagrams with live previews. It supports multiple export formats and provides error feedback, streamlining the creation of documentation and UML diagrams.

What it does

It offers a developer-friendly editor with live preview modes and error reporting for Mermaid and PlantUML code, allowing users to create and export diagrams in PNG, JPG, SVG, PDF, or HTML formats.

Who it's for

Ideal for developers and technical writers creating documentation, architecture notes, UML, and README diagrams.

Why it matters

It eliminates the need to switch between browsers and editors by integrating coding and visualization in one native macOS app.