GraphQL Voyager is an interactive GraphQL schema explorer that visualizes any GraphQL API as an interactive graph. It consumes GraphQL introspection data (or SDL) and renders a navigable representation of the schema's types, fields, and relationships using Graphviz and SVG. The application is built with React and TypeScript, offering multiple consumption methods: a standalone bundle for direct browser use, an NPM package for integration with bundlers like Webpack, and middleware adapters for Express, Hapi, and Koa frameworks. The core functionality involves processing introspection JSON to extract type information, filtering out internal types (like Relay) and deprecated fields, and constructing a graph where nodes represent GraphQL types and edges represent relationships (such as field types). This graph is rendered via a Graphviz worker, with the resulting SVG enhanced for interactivity (tooltips, pan/zoom, click-to-explore). A companion documentation panel allows users to inspect details of selected types, including fields, arguments, and directives. Beyond the visualization, Voyager includes several reusable utilities that demonstrate thoughtful engineering: an LRU cache implemented in localStorage for efficient SVG rendering caching, a React hook for managing promise states (loading, error, success), and a flexible object matching utility. The project maintains a robust development workflow with TypeScript, Webpack, Playwright end-to-end testing (via Docker), and automated dependency updates via Dependabot. Recent commits indicate active maintenance, and the codebase adheres to modern React and TypeScript practices.