Zod to OpenAPI Schema Generator
Convert Zod validation schemas into OpenAPI 3.0 and 3.1 Swagger specifications in your browser.
At a glance
Zod to OpenAPI Schema Generator transforms runtime Zod schemas into valid OpenAPI 3.0 and 3.1 specifications in YAML or JSON. It converts z.object into components.schemas models, maps primitive validators and string formats like email or uuid, supports enums and unions, and preserves descriptions for Swagger documentation.
100% Client-Side Zod to OpenAPI 3.0 / 3.1 Schema Generator
Compile runtime Zod schemas into Swagger and OpenAPI 3.0.3 / 3.1.0 specifications with instant YAML and JSON export. Zero server uploads.
Swagger & Redoc Compatible
Generated specifications import directly into Swagger UI, Redoc, Postman, and API gateways with standard components.schemas structure.
Rich Constraint Mapping
Preserves regex patterns, string formats (email, uuid, datetime), min/max limits, enums, unions, and JSDoc descriptions.
100% In-Browser Privacy
All AST parsing and YAML/JSON generation executes strictly inside your local browser tab. No code is transmitted to external servers.
Why Use This Zod to OpenAPI Schema Generator?
How to Use Zod to OpenAPI Schema Generator
Paste Zod Schema
Paste your Zod schema source code into the input editor or select a pre-built API template.
Select Format & Version
Choose between YAML and JSON output, and select OpenAPI 3.0.3 or OpenAPI 3.1.0.
Copy or Download Specification
Copy the generated specification directly to your clipboard or download as .yaml or .json.
Zod to OpenAPI example
Converts runtime Zod userSchema into a standard OpenAPI 3.0 components.schemas definition with uuid and email formats and enum validation.
const userSchema = z.object({
id: z.string().uuid(),
email: z.string().email(),
role: z.enum(["admin", "user"])
});
openapi: 3.0.3
info:
title: Generated API Specification
version: 1.0.0
paths: {}
components:
schemas:
User:
type: object
properties:
id:
type: string
format: uuid
email:
type: string
format: email
role:
type: string
enum:
- admin
- user
required:
- id
- email
- role
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | TEXT/PLAIN, .TS, .JS → TEXT/YAML, TEXT/PLAIN, .JSON |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Modern browser with JavaScript enabled. |
| Performance Constraints | Runs client-side in browser memory. Performance and file limits are bounded by available local device RAM. |
100% Client-Side Privacy Guarantee
Your code files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
Can I import the generated specification into Swagger UI or Postman?
How are optional and nullable fields converted in OpenAPI?
Is my Zod code sent to any external server?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .