Auto-generate Express.js API documentation from your route files, middleware stack, and handler functions. Works with JavaScript and TypeScript Express projects.
Express applications grow organically — routes spread across files, middleware stacks grow complicated, and no one writes the API documentation. The result is an API that only the original developer understands.
Tailored documentation features for Express codebases
Maps Express router files and generates complete REST API reference with methods and paths
Documents middleware stack — auth, validation, rate limiting, logging — in execution order
Generates request/response schema documentation from Joi, Zod, or express-validator rules
Produces environment variable reference from your .env.example or dotenv configuration
From zero to published docs in under a minute
Paste your GitHub repository URL. Public repos work instantly — no signup required for the free README preview.
Codec8 reads your Express source code, dependencies, and structure, then generates README, API docs, architecture diagrams, and setup guide.
Download your documentation as Markdown files or let Codec8 open a pull request directly to your repository.
These well-known projects are perfect candidates for Codec8
Yes. For TypeScript Express projects, Codec8 reads type annotations on request handlers and generates typed API documentation with request/response interface definitions.
Yes. Codec8 reads your Mongoose schemas or Sequelize model definitions and includes database model documentation alongside the REST API reference.
Codec8 traces middleware registration from your app.use calls and documents the complete middleware chain for each route group, showing what runs before each handler.
Paste your GitHub repo URL and get a free README preview in 60 seconds. No signup required.
Generate Express docs free