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JSON Schema to Zod Schema Converter

Convert JSON Schema JSON/YAML definitions into ready-to-use Zod schemas with nested objects, arrays, enums, and common validation rules

Example Results

1 examples

Convert an object schema into a Zod validator

Generate a Zod object schema with required and optional fields plus built-in validation rules from JSON Schema

import { z } from 'zod'

export const userSchema = z.object({ email: z.string().email(), age: z.number().int().min(18).optional() })

export type UserSchema = z.infer<typeof userSchema>
View input parameters
{ "schemaInput": "{\n \"type\": \"object\",\n \"required\": [\"email\"],\n \"properties\": {\n \"email\": { \"type\": \"string\", \"format\": \"email\" },\n \"age\": { \"type\": \"integer\", \"minimum\": 18 }\n }\n}", "sourceFormat": "json", "rootSchemaName": "userSchema", "namingStyle": "camel", "outputMode": "schema-and-type", "includeDescriptions": true }

Key Facts

Category
Development
Input Types
textarea, select, text, checkbox
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The JSON Schema to Zod Schema Converter is a developer utility that transforms JSON or YAML schema definitions into production-ready Zod validation code. It simplifies TypeScript development by automatically generating schemas that include nested objects, arrays, enums, and standard validation rules, ensuring type safety and runtime data integrity.

When to Use

  • •When you need to synchronize your API documentation with TypeScript runtime validation logic.
  • •When migrating existing JSON Schema definitions into a Zod-based validation workflow.
  • •When you want to eliminate manual boilerplate code for complex data structures and validation rules.

How It Works

  • •Paste your JSON Schema or YAML definition into the input field.
  • •Select your preferred naming style and output mode, such as generating both the schema and the inferred TypeScript type.
  • •Click convert to generate the Zod code, which you can then copy directly into your project files.

Use Cases

Generating Zod validators for REST API request bodies based on OpenAPI or JSON Schema definitions.
Standardizing data validation across frontend and backend services using shared schema definitions.
Quickly scaffolding TypeScript interfaces and validation logic for new data models.

Examples

1. Converting User Profile Schema

Frontend Developer
Background
A developer is building a user registration form and has an existing JSON Schema for the user profile.
Problem
Manually writing a Zod schema that matches the existing JSON Schema is error-prone and time-consuming.
How to Use
Paste the JSON Schema into the tool, set the root name to 'userSchema', and select 'Schema + Infer Type'.
Example Config
rootSchemaName: userSchema, outputMode: schema-and-type
Outcome
The tool outputs a clean Zod schema and a TypeScript interface, ready to be imported into the registration component.

Try with Samples

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FAQ

Does this tool support both JSON and YAML inputs?

Yes, you can provide your schema in either JSON or YAML format, and the tool can auto-detect the source format.

Can I generate TypeScript types alongside the Zod schema?

Yes, by selecting the 'Schema + Infer Type' output mode, the tool will generate both the Zod validator and the corresponding TypeScript type using z.infer.

Does it handle nested objects and arrays?

Yes, the converter recursively processes nested objects, arrays, and complex data structures defined in your JSON Schema.

Can I customize the naming convention of the generated code?

Yes, you can choose between camelCase, PascalCase, or keep the original naming style from your schema.

Are validation rules like minimum/maximum values preserved?

Yes, the tool maps standard JSON Schema validation keywords like minimum, maximum, and format directly to their equivalent Zod methods.

API Documentation

Request Endpoint

POST /en/api/tools/json-schema-to-zod-schema-converter

Request Parameters

Parameter Name Type Required Description
schemaInput textarea Yes -
sourceFormat select No -
rootSchemaName text No -
namingStyle select No -
outputMode select No -
includeDescriptions checkbox No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-json-schema-to-zod-schema-converter": {
      "name": "json-schema-to-zod-schema-converter",
      "description": "Convert JSON Schema JSON/YAML definitions into ready-to-use Zod schemas with nested objects, arrays, enums, and common validation rules",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=json-schema-to-zod-schema-converter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]