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Generate OpenAPI specs from Express routes. Use when documenting APIs.
| name | swagger-gen |
| description | Generate OpenAPI specs from Express routes. Use when documenting APIs. |
Your API has no documentation. This reads your Express routes and generates a complete OpenAPI 3.0 spec.
One command. Zero config. Just works.
npx ai-swagger ./src/routes/
# Generate from routes
npx ai-swagger ./src/routes/
# Single file
npx ai-swagger ./src/routes/users.ts -o docs/api.yaml
This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.
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No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.
npx ai-swagger --help
Parses your Express route definitions to extract endpoints, methods, and handler code. Then generates OpenAPI spec with proper types and descriptions.
MIT. Free forever. Use it however you want.