OpenAPI to TypeScript
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 here. 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.