What OpenAPI versions does this support?

The converter works with OpenAPI 2.0 (Swagger) and OpenAPI 3.x schema definitions. Paste the components/schemas or definitions section from your spec.

OpenAPI to TypeScript

Q: How are required vs optional fields handled?

Fields listed in the 'required' array are generated without '?'. Fields not in 'required' get the '?' optional modifier in the TypeScript interface.

Convert OpenAPI & Swagger schemas to TypeScript interfaces with AI.

Stop writing TypeScript interfaces by hand from your API spec. Paste your OpenAPI or Swagger schema definitions and get fully-typed TypeScript interfaces instantly — with correct optional fields, type mappings, and JSDoc from description fields.

Paste your code, then click Convert

TypeScript

How to use this tool?

This online converter harnesses AI to translate OpenAPI/Swagger schema definitions to TypeScript interfaces. Follow these steps:

Paste your OpenAPI schema YAML or JSON components into the input box provided.
Click the "Convert" button to generate TypeScript interfaces from each schema.
View the TypeScript interfaces in the output box, ready to use in your project.

Example: Simple Function

OpenAPI Schema

components:
  schemas:
    User:
      type: object
      required: [id, name]
      properties:
        id:
          type: integer
        name:
          type: string
        email:
          type: string

TypeScript

export interface User {
  id: number;
  name: string;
  email?: string;
}

Frequently Asked Questions

What OpenAPI versions are supported?

The converter works with OpenAPI 2.0 (Swagger) and OpenAPI 3.x schemas. Paste the components/schemas (v3) or definitions (v2) section from your spec.

How are required vs optional fields handled?

Fields listed in the 'required' array produce non-optional TypeScript properties. All other fields get the '?' optional modifier.

What OpenAPI types map to TypeScript?

string→string, integer/number→number, boolean→boolean, array→T[], object→interface. $ref references use the referenced type name.

Can I convert a full OpenAPI spec?

For best results, paste just the components/schemas section. Full spec files work too — the converter extracts the schema definitions and generates interfaces for each.

Is the tool free?

Yes, completely free with no account required.