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OpenAPI to TypeScript Generator

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Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Programmatic Access

OpenAPI to TypeScript Generator is also callable as a free HTTP JSON API at https://aidevhub.io/api/openapi-to-typescript/ — GET with query parameters or POST with a JSON body, no authentication, CORS enabled, 50 requests/day per IP. Responses return { ok, tool, result, meta }. 

curl -s -X POST https://aidevhub.io/api/openapi-to-typescript/ \
  -H "Content-Type: application/json" \
  -d '{"spec":"{\"openapi\":\"3.0.0\",\"info\":{\"title\":\"API\",\"version\":\"1.0.0\"},\"paths\":{},\"components\":{\"schemas\":{\"User\":{\"type\":\"object\",\"properties\":{\"id\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"}}}}}}"}'

Machine-readable contract: /api/tool/openapi-to-typescript.json All API endpoints: /agents/ LLM site index: /llms.txt

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/openapi-to-typescript/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/openapi-to-typescript/ GET openapi-to-typescript
POST /api/openapi-to-typescript/ POST openapi-to-typescript

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=openapi-to-typescript&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: 10 req / 60s, input max 512 KB.

How to Use OpenAPI to TypeScript Generator

  1. 1

    Paste OpenAPI 3.x spec

    Input your OpenAPI/Swagger spec in JSON or YAML format. The tool parses components, paths, and request/response schemas.

  2. 2

    Select code generation options

    Choose interface-only types, full client stubs, or validation utilities. Pick between strict or lenient enum handling.

  3. 3

    Configure naming conventions

    Set naming style (camelCase, snake_case, PascalCase) for generated type and interface names.

  4. 4

    Generate TypeScript

    The tool creates .ts files with type definitions for all endpoints, request bodies, and response shapes. Ready for use with axios, fetch, or tRPC.

  5. 5

    Download bundle

    Export as a single .ts file or modular structure. Include optional validation utilities (Zod, io-ts) for runtime checks.

Frequently Asked Questions

What OpenAPI versions are supported?
OpenAPI 3.0.x and 3.1.x in both JSON and YAML formats. Swagger 2.0 is not directly supported — convert it to OpenAPI 3.x first using the Swagger Editor.
Does it handle $ref references?
Yes, all $ref references within the spec are resolved, including nested references and circular references (which generate type aliases to avoid infinite recursion).
Can I generate an API client?
Yes, optionally generate a typed fetch client with methods for each endpoint, properly typed path parameters, query parameters, request bodies, and response types.
How does it handle oneOf/anyOf?
oneOf generates discriminated union types when a discriminator property is present, or plain union types otherwise. anyOf generates intersection types. allOf merges into a single interface.
Can I paste YAML or JSON?
Both formats are accepted. The tool auto-detects whether your spec is YAML or JSON and parses accordingly.