OpenAPI to Zod Schema Generator
Convert OpenAPI 3.x and Swagger 2.0 schema specifications into runtime TypeScript Zod schemas and inferred static types directly in your browser.
At a glance
OpenAPI to Zod Schema Generator is a free client-side tool that compiles OpenAPI 3.0, 3.1, and Swagger 2.0 schemas into runtime TypeScript Zod validators. It resolves local $ref pointers, allOf merges, oneOf unions, and string formats with static type inference. Zero server uploads — everything compiles in browser memory.
100% Client-Side In-Browser OpenAPI & Swagger Zod Schema Generator
OpenAPI 3.0, 3.1, and Swagger 2.0 schemas compile into runtime TypeScript Zod schemas locally in your browser memory. Zero code or schema uploads.
How OpenAPI to Zod Schema Generation Works
Validating HTTP request payloads or incoming third-party API responses in Node.js, Next.js, and browser environments requires runtime validation. Static TypeScript types disappear after compilation; Zod schemas enforce type safety at runtime. This generator converts OpenAPI 3.0, 3.1, and Swagger 2.0 definitions into modular Zod validators.
$ref Pointer Resolution
Resolves local JSON pointers (#/components/schemas/Model or #/definitions/Model) and outputs modular schema constants with automatic cross-references.
String Formats & Constraints
Automatically maps OpenAPI string format attributes to built-in Zod refinements: email → .email(), uuid → .uuid(), and uri → .url().
allOf & oneOf Unions
Translates allOf compositions into schema extensions (.extend(...)) and polymorphic oneOf / anyOf arrays into z.union([...]).
Why Use This OpenAPI to Zod Schema Generator?
How to Use OpenAPI to Zod Schema Generator
Paste OpenAPI / Swagger Definition
Enter your OpenAPI 3.x or Swagger 2.0 JSON or drop an .json/.yaml file into the editor.
Configure Zod Options
Toggle export keywords, inferred TypeScript types (z.infer), format validators, and schema naming suffix.
Copy or Download Zod Code
Copy the generated Zod validation code directly to your clipboard or download as a .ts file.
OpenAPI 3.0 Schema to Zod Validator
Compiles the OpenAPI 3.0 User schema into a runtime Zod validator schema with static TypeScript type inference.
{
"components": {
"schemas": {
"User": {
"type": "object",
"required": ["id", "username"],
"properties": {
"id": { "type": "integer" },
"username": { "type": "string" },
"email": { "type": "string", "format": "email" }
}
}
}
}
}
export const UserSchema = z.object({
id: z.number().int(),
username: z.string(),
email: z.string().email().optional()
});
export type User = z.infer<typeof UserSchema>;
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | APPLICATION/JSON, TEXT/PLAIN, .JSON, .TXT → TEXT/TYPESCRIPT, TEXT/PLAIN, .TS |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs. |
| Performance Constraints | Runs 100% client-side in browser memory. Performance bounded by local device RAM. |
100% Client-Side Privacy Guarantee
Your files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
Are my API specifications uploaded to an external server?
Does it support OpenAPI 3.0, 3.1, and Swagger 2.0?
How does the tool resolve $ref pointers?
Does it support allOf and oneOf schema composition?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .