The article introduces Beautiful Mermaid, a tool that renders Mermaid diagrams as beautiful SVGs or ASCII art, with features such as ultra-fast rendering, themeability, and zero DOM dependencies. It supports various diagram types, including flowcharts, state diagrams, and XY charts. The tool is designed to work well with AI-assisted coding workflows and can render diagrams in terminals or chat interfaces. The ASCII rendering engine is based on mermaid-ascii by Alexander Grooff, which was ported to TypeScript and extended.