OpenAPI 3.1 / Swagger YAML to TypeScript Interfaces
Compile OpenAPI 3.0 and 3.1 YAML or JSON specifications into clean, strongly-typed TypeScript interfaces and Zod validation schemas locally. 100% computed inside your browser with zero server transmissions.
/**
* Generated TypeScript Interfaces
* Source: Swagger Petstore Pro (v1.0.0)
* Specification: OpenAPI 3.1.0
* Generated: 2026-10-13T02:46:26.844Z
* 100% Client-Side Engine (Zero Server Storage)
*/
export interface Category {
/**
* Category unique identifier
* @format int64
*/
id: number;
/**
* Category display name
* @example "Dogs"
*/
name: string;
}
export interface Tag {
/** @format int64 */
id: number;
/** @example "friendly" */
name: string;
}
export interface Pet {
/**
* Unique pet ID in catalog
* @format int64
*/
id: number;
/** @example "Buddy" */
name: string;
category?: Category;
/** Public gallery media URLs */
photoUrls?: string[];
tags?: Tag[];
/**
* Pet adoption state
* @default "available"
*/
status: "available" | "pending" | "sold";
/** OpenAPI 3.1 multi-type nullable string */
notes?: string | null;
/** Custom key-value pairs */
metadata?: Record<string, string>;
}
export interface NewPet {
name: string;
category?: Category;
/** @default "available" */
status?: "available" | "pending" | "sold";
}
export interface ErrorResponse {
/** HTTP status code or business error code */
code: number;
/** Human-readable error message */
message: string;
details?: string[];
}OpenAPI Specification to TypeScript Conversion Guide
Understanding type conversion rules, OpenAPI 3.1 vs 3.0 differences, and zero-server privacy benefits.
100% Client-Side Privacy
All parsing, AST generation, and serialization runs directly inside your browser using web standards and WebAssembly. No API keys, internal contracts, or sensitive endpoints are ever submitted to any remote server or cloud database.
OpenAPI 3.1 vs 3.0 Compatibility
OpenAPI 3.1 fully adopts the JSON Schema 2020-12 specification, supporting multi-type arrays like type: ["string", "null"]. This converter automatically normalizes both OpenAPI 3.0 nullable: true and 3.1 type arrays into idiomatic TypeScript unions.
Zod 3 Runtime Validation
Generate production-ready Zod schemas alongside your compile-time interfaces. Includes native string format validators (.email(), .uuid(), .datetime()) and schema inference via z.infer<typeof Schema>.
How to Integrate the Generated Types into Your Application
Frequently Asked Questions (FAQ)
How does OpenAPI 3.1 nullability differ from OpenAPI 3.0 in TypeScript?
OpenAPI 3.0 uses the boolean modifier nullable: true alongside a primitive type. OpenAPI 3.1 directly conforms to JSON Schema 2020-12, representing nullability using type arrays like type: ["string", "null"]. Our compiler normalizes both formats into clean TypeScript union types (string | null).
Can I generate both compile-time TypeScript types and runtime Zod validators?
Yes! The tool simultaneously generates static TypeScript interfaces/type aliases and runtime Zod schemas. Zod schemas automatically include format validators (such as .email(), .uuid(), and .datetime()) and export inferred types with z.infer<typeof Schema>.
Are my private API specifications sent to any backend servers or cloud services?
No. In accordance with ToolsAA Privacy First Architecture, all parsing, AST transformation, and code generation execute 100% inside your local browser sandbox. No contracts, endpoint URLs, authorization schemes, or internal parameters ever leave your machine.
How are OpenAPI $ref schemas and definitions resolved?
References pointing to #/components/schemas/Name or Swagger 2.0 #/definitions/Name are automatically converted into PascalCase type names (Name or NameSchema in Zod). This keeps generated interfaces clean and modular.