Visimer – open-source visual editor for Mermaid diagrams
Hi HN, Nick here, founder at OpenKnowledge. We built an open source library, Visimer, for editing Mermaid diagrams with a what-you-see-is-what-you-get visual editor. Try the playground at https://visimer.com/playground. You can rename labels, change shapes, add new nodes, etc. by clicking and dragging the visual canvas. We set out to build this originally for OpenKnowledge, our markdown wysiwyg editor, then realized it’d be great to share it as a proper embeddable component library so that other apps can leverage it as well. Our general take is that AI is great for generating…
Visimer – open-source visual editor for Mermaid diagrams launched on August 17, 2026 with 17 votes, #789 of 23,274 launches that month and more than 90% of that year's launches.
In plain words
Visimer is an open-source visual editor that allows users to edit Mermaid diagrams through a what-you-see-is-what-you-get interface. Instead of manually writing syntax, users can rename labels, change shapes, and add nodes by clicking and dragging directly on the rendered diagram. It's designed for developers and applications that need to let users refine AI-generated diagrams or create visual documentation without learning Mermaid syntax. Available as an embeddable component library that can be integrated into other applications.
written from the facts on this page · September 2026
From the sources
Visual editing for Mermaid diagrams. Contribute to inkeep/visimer development by creating an account on GitHub.
In the maker’s words, at launch
Hi HN, Nick here, founder at OpenKnowledge. We built an open source library, Visimer, for editing Mermaid diagrams with a what-you-see-is-what-you-get visual editor. Try the playground at https://visimer.com/playground. You can rename labels, change shapes, add new nodes, etc. by clicking and dragging…
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