What is OpenAPI to TypeScript Axios Client Generator?

This tool converts OpenAPI 3.0/3.1 and Swagger 2.0 specifications into a fully typed TypeScript Axios HTTP client. It generates TypeScript interfaces for all schemas and request/response types, plus an API client class with typed methods for each endpoint.

How to Use

Set the API client class name (default: ApiClient)
Paste your OpenAPI or Swagger specification (JSON or YAML format)
Click "Generate Client" to create the TypeScript code
Copy the generated files (types.ts, api.ts, index.ts) to your project

Why Use This Tool?

Fully typed request and response interfaces

Automatic type inference from OpenAPI schemas

Supports path parameters, query parameters, and request bodies

Handles $ref references and nested schemas

Works with both OpenAPI 3.x and Swagger 2.x

Generates a clean, reusable Axios client class

Tips & Best Practices

Use the operationId field in your spec for cleaner method names
The generated client uses AxiosRequestConfig for additional options
You can extend the generated class to add interceptors or custom logic
For large APIs, consider splitting into multiple clients by tag

Frequently Asked Questions

What OpenAPI versions are supported?

OpenAPI 3.0.x, 3.1.x, and Swagger 2.0 specifications are all supported. The tool automatically detects the version and handles the differences.

How are $ref references handled?

All $ref references are resolved and converted to TypeScript type references. Schemas from components/schemas (OpenAPI 3.x) or definitions (Swagger 2.x) are generated as interfaces.

Can I use YAML format?

Yes, the tool accepts both JSON and YAML formats. Simply paste your YAML OpenAPI spec and it will be parsed automatically.

How do I use the generated client?

Import the client class, create an instance with your base URL, and call the typed methods. Example: const api = new ApiClient("https://api.example.com"); const pets = await api.listPets();

OpenAPI to TypeScript Axios Client Generator