Show HN: Yantra – Interactive step-by-step diagrams as one offline HTML file

Category: devtools

Tags: diagram-generation, offline-html, json-schema, visualization, mcp, cli-tool

Score: 6.0/10 (Innovation: 6, Technical: 6, Documentation: 7, Utility: 5)

Yantra converts JSON descriptions into interactive, step-by-step diagrams (architecture, sequence, flowchart, etc.) and exports them as a single offline HTML file with walkthrough highlights and validation. It stands out by combining automatic layout, edge routing, and a storyboard format, making it useful for both developers and AI agents via MCP, CLI, and browser playground.

Target audience: backend developers, frontend developers, devops, technical writers, AI coding agents

Repository: https://github.com/niyankhadka/yantra · JavaScript · MIT · 3 stars

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