OpenAPI to TypeScript converter

Convert OpenAPI 3.x documents into TypeScript types entirely in your browser with common openapi-typescript generation options.

OpenAPI document

Paste an OpenAPI 3.0 or 3.1 document in JSON or YAML, import it from a file, or fetch it from a CORS-enabled URL.

TypeScript output

TypeScript types generated with openapi-typescript using the selected options.

Generation options

Tune the generated types without changing the source document.

What does the OpenAPI to TypeScript converter do?

OpenAPI to TypeScript Converter turns an OpenAPI 3.x document into generated TypeScript types directly in your browser. It is useful when you want a fast type preview, a downloadable declaration file, or a safe way to test `openapi-typescript` options without sending your schema to a server.

When to use it

Use this tool when you already have an OpenAPI schema in JSON or YAML and want typed request and response models for frontend apps, SDK prototypes, or API reviews. It is especially helpful for comparing generation options before you commit the output to your repository.

Before you generate

This tool supports bundled OpenAPI 3.0 and 3.1 documents. If your schema contains external `$ref` targets, bundle or inline them before generating TypeScript types.

How to use

Convert OpenAPI 3.x documents into TypeScript types entirely in your browser with common openapi-typescript generation options.