TypeDoc is a documentation generator that converts TypeScript source code comments and type information into comprehensive API reference documentation. It solves the problem of keeping API documentation synchronized with code by automatically extracting type signatures, JSDoc comments, and module structures from TypeScript projects and rendering them as navigable HTML documentation. TypeDoc eliminates the manual effort of writing and maintaining separate API reference documents, ensuring documentation always reflects the current state of the codebase.
TypeDoc supports all TypeScript language features including generics, conditional types, mapped types, and declaration merging, and generates documentation that preserves the full type hierarchy and module structure. It provides configurable output including HTML, Markdown, and JSON formats, a plugin system for customizing output rendering and processing, cross-referencing between types and modules, inheritance visualization, and category-based organization of exports. TypeDoc also supports monorepo documentation generation, custom themes, and integration with documentation platforms through its Markdown output plugin.
TypeDoc is essential for TypeScript library authors, framework maintainers, and teams building public APIs who need accurate, auto-generated API reference documentation. It integrates with CI/CD pipelines for automated documentation generation on every release, and its Markdown output can be consumed by documentation platforms like Docusaurus, VitePress, and Fumadocs. TypeDoc is particularly valuable for npm package authors who want to provide comprehensive API documentation on their documentation sites or GitHub Pages without manually documenting every type, function, and class.