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Beauty Diagram is an online diagram editor and beautifier for Mermaid, PlantUML, and draw.io workflows. It allows users to paste existing diagram source, preview the result live, and automatically improve layout, spacing, typography, and visual styling without manually redrawing the diagram.
The app supports multiple diagram types, including flowcharts, sequence diagrams, ER diagrams, class diagrams, state diagrams, Gantt charts, mind maps, pie charts, and PlantUML activity diagrams. It can re-layout flowcharts with orthogonal routing, apply consistent themes, and refine presentation details such as shadows, color balance, and label alignment. These features are designed to help create diagrams that are easier to read in documents, presentations, and markdown-based workflows.
Beauty Diagram also includes export options for SVG and PNG, making it suitable for web use, documentation, and slide decks. Users can work with the source code they already have, keep the original diagram text intact, and make visual adjustments through the editor while preserving a version-controllable workflow. The app is positioned for people who need a diagram tool focused on clear rendering, visual cleanup, and professional-looking exports.
Website: beauty-diagram.com
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