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Mermaid to ASCII art (mermaid-ascii)

Named practitioner synthesis

#435

T3digested

Canonical URL: https://simonwillison.net/2026/Jul/16/mermaid-ascii/#atom-everything
Topic: Practitioner Notes
First seen: 2026-07-17 07:16:08
Last seen: 2026-07-17 07:16:08

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Blog / Newsletter2026-07-17 07:15:44
Mermaid to ASCII art (mermaid-ascii)
<p><strong>Tool:</strong> <a href="https://tools.simonwillison.net/mermaid-ascii">Mermaid to ASCII art (mermaid-ascii)</a></p> <p>After building the <a href="https://simonwillison.net/2026/Jul/16/grok-mermaid/">Mermaid to ASCII tool based on Grok Build's Rust code</a> I learned that there's an older, more fully-featured Go library called <a href="https://github.com/AlexanderGrooff/mermaid-ascii">AlexanderGrooff/mermaid-ascii</a> that implements a similar pattern, so I had Claude Fable 5 compile that one to WebAssembly as well so I could compare the two.</p> <p>This one includes support for colors!</p> <p><img alt="Screenshot of a Mermaid diagram editor web app. A row of tab buttons reads: Flowchart, Multiple links, Subgraphs, Multi-line labels, Colors (selected, highlighted blue), Sequence, Alt fragment, Loop + note, Parallel. Below is a text input area containing: "graph LR / Build:::good --> Test:::good / Test --> Deploy:::warn / Deploy --> Rollback:::bad / clas