JSON Schema to Zod Schema Converter

Transform JSON Schema specifications into runtime Zod schemas with TypeScript type inference directly in your browser.

At a glance

JSON Schema to Zod Schema Converter is a free web tool that converts JSON Schema Draft-04, Draft-07, and Draft 2020-12 specifications into TypeScript Zod validation schemas online. It maps minLength, maxLength, minimum, maximum, patterns, and string formats. Resolves nested $defs and definitions into standalone reusable Zod schemas. All processing is local: nothing is uploaded, and no account is required.

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Developer Suite: JSON Schema to Zod Schema to TypeScript JSON to Zod JSON to Schema JSON to OpenAPI JSON Formatter

100% Client-Side JSON Schema to Zod Compiler

Generate runtime Zod validation schemas and TypeScript types from JSON Schema Draft-04/07/2020-12 specifications directly in your browser.

100% In-Browser Privacy Instant Generation
Sample Presets:
Valid Schema 0 chars
Root Schema
rootSchema
Properties Mapped
0
Output Size
0 bytes

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Why Use This JSON Schema to Zod Schema Converter?

100% Client-Side Privacy: Confidential schema definitions and validation contracts never leave your browser.
Comprehensive Constraints: Maps minLength, maxLength, minimum, maximum, patterns, and string formats.
Definition & $ref Support: Resolves nested $defs and definitions into standalone reusable Zod schemas.
Type Inference Included: Emits export type <Name> = z.infer<typeof <name>Schema> automatically.

How to Use JSON Schema to Zod Schema Converter

1

Paste JSON Schema

Paste your JSON Schema definition or drop a .json schema file into the editor.

2

Configure Zod Options

Customize the root schema variable name, toggle type inference, and choose between ESM or CJS.

3

Copy or Download Zod Code

Review the generated runtime validation schema in real-time, copy code, or download as .ts / .js.

User Registration JSON Schema to Zod Validation Schema

Translates email format to .email(), integer minimum to .int().min(18), unrequired properties to .optional(), and generates inferred TypeScript types.

JSON Schema Input Source 
{
  "type": "object",
  "properties": {
    "email": { "type": "string", "format": "email" },
    "age": { "type": "integer", "minimum": 18 },
    "role": { "type": "string", "enum": ["admin", "user"] }
  },
  "required": ["email"]
}
Generated Zod Schema Output Processed 
import { z } from 'zod';

export const userSchema = z.object({
  email: z.string().email(),
  age: z.number().int().min(18).optional(),
  role: z.enum(["admin","user"]).optional()
});
export type User = z.infer<typeof userSchema>;

Technical Specifications & Engine Details

Technical specifications and engine details for JSON Schema to Zod Schema Converter
Specification Details
Supported Formats APPLICATION/SCHEMA+JSON, APPLICATION/JSON, TEXT/PLAIN, .JSON → APPLICATION/TYPESCRIPT, APPLICATION/JAVASCRIPT, TEXT/PLAIN, .TS, .JS
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.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your files and JSON Schema specifications remain strictly on your local device. Zero data is transmitted to external servers.

Frequently Asked Questions

How does this converter differ from JSON to Zod?
JSON to Zod infers validation rules from sample JSON payload values, whereas JSON Schema to Zod compiles formal specification contracts with explicit minimums, maximums, and formats.
How does it handle optional vs required properties?
Properties not listed in the schema's 'required' array automatically receive the .optional() modifier in the generated Zod object.
Can I resolve references ($ref) across definitions?
Yes. Definitions located in #/definitions or #/$defs are automatically compiled into named Zod schemas and referenced properly.

Methodology

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Last updated .

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