Orval generates type-safe TypeScript clients from any valid OpenAPI v3 or Swagger v2 specification, either in YAML or JSON formats.

Developers often use OpenAPI/Swagger as a contract between frontend and backend. Before Orval, tools like Swagger Editor or Swagger Codegen did the job. But that's not enough for modern development needs. Enter Orval.

Main Goals

• Generate TypeScript models — Full type safety for your API responses and requests
• Generate HTTP request functions — Ready-to-use functions with proper typing
• Generate mocks with MSW — Test your frontend without a backend

The default generated clients use Fetch API. You can configure any client (e.g. axios) depending on your project needs.