Diagrams as code. Describe a system as nodes, edges, and groups on the left, and get a polished interactive diagram on the right: pan and zoom, click a node to trace everything it reaches upstream and downstream, search, switch theme, and export a clean SVG or PNG. The command line turns the same source into one self contained HTML file you can open anywhere. Nothing you type here leaves your browser.
Naqsha means map or blueprint. Diagrams as code with zero dependencies, in the browser and as a command line tool. Source on GitHub.