GUI for editing Mermaid class diagrams
In plain words
This is a graphical interface for creating and editing Mermaid class diagrams, which are used to visualize object-oriented structures and relationships. It is intended for developers, software architects, and technical teams who need to design and document class hierarchies and system architecture. The tool replaces manual text-based diagram coding with a visual editing approach, making it more accessible to users who prefer drawing over writing diagram syntax.
written from the facts on this page · September 2026
Does the same job
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Line9 – A Mermaid rendering engine with its own layoutAug 2026 · line9.ai · ▲87Line9 is a new rendering engine for Mermaid flowchart diagrams that aims to remove the need for manual adjustment of layout. Mermaid is a popular text-based language for describing multiple types of diagrams. Several Mermaid rendering engines already exist. Most, like the original mermaid.js, use Dagre or ELK graph drawing libraries to automatically lay out their diagrams. I’ve used Mermaid for the past four years but often recreated my flowcharts in a diagram editor so that I could modify the layout to something that better suited my needs. Use Line9 when you want an automatic flowchart…

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