ZeroServer.tools

OpenAPI to TypeScript

Generate TypeScript interfaces from any OpenAPI 3.0 schema component.

OpenAPI Schema (JSON)

TypeScript Interfaces

export interface User {
  id: number;
  email: string;
  name?: string;
  active?: boolean;
  tags?: string[];
  address?: Address;
}

export interface Address {
  street?: string;
  city?: string;
}

About OpenAPI to TypeScript

This tool converts OpenAPI 3.0 schema definitions into TypeScript interfaces in your browser — nothing leaves your machine. Paste a full OpenAPI document (with a components/schemas block) or a single schema object and the generator produces one export interface per schema. Properties listed in required are emitted without the ? modifier; all others are optional. $ref pointers are resolved to their referenced interface name, integer and number both map to TypeScript's number, and typed arrays use the T[] syntax. Download the result as a .d.ts declaration file or copy it straight into your project.