About Mermaid
Markdownish syntax for generating flowcharts, sequence diagrams, class diagrams, gantt charts and git graphs.
How many people use Mermaid
GitHub · npm
#3 of 48 JavaScript graphics we have counts for (of 61) · bars are GitHub stars across these neighbours; the category leader is Three.js at 116k · as of September 21, 2026
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#3 of 48 JavaScript graphics
D3#2 of 48 JavaScript graphics
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We measure the detected version against Mermaid's release history and grade the surrounding stack with a Lighthouse-grade quality audit. Weak or outdated links weigh more - one risky dependency can pull the whole score down.
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