Does this generate TypeScript types alongside Zod schemas?

Yes. It automatically includes `export type User = z.infer ;` for seamless TypeScript integration.

How does it handle nullable or missing properties?

You can configure whether null values generate `.nullable()`, `.optional()`, or `.nullish()` modifiers in the settings panel.

Is my input data secure and private?

Yes. No payload data ever leaves your computer; all schema generation is performed locally in your browser.

JSON to Zod Schema Converter – Generate Zod Validation Schemas

About JSON to Zod

Generate runtime Zod schema validation rules and inferred static types from sample JSON payloads

Zod v3 Ready100% Client-Side

Data Flow:Input: JSON (Object / Array)➔Output: Zod Schema (.ts)

A JSON to Zod converter transforms sample JSON payloads into executable Zod schema definitions (`z.object({...})`) for runtime data validation and static TypeScript type inference.

This tool evaluates JSON data structures and creates strongly-typed Zod schemas including `z.string()`, `z.number()`, `z.boolean()`, `z.array()`, and `z.object()`. It also generates the corresponding `z.infer<typeof schema>` TypeScript type declarations.

Generates executable z.object({...}) validation trees

Produces z.infer<typeof schema> TypeScript types

Smart pattern detection for emails, URLs, dates, and UUIDs

Customizable optional, nullable, and default property handling

Important Note: Specialized string validations (like `.email()`, `.url()`, or `.uuid()`) are inferred based on common pattern heuristics; always verify custom validation regexes for domain-specific constraints.

Strict client-side execution. Your payload is never transmitted across the network or stored in external servers.

✦

// LIVE TRANSFORMATION EXAMPLE

SAMPLE OUTPUT

Checkout Form Payload to Zod Validation Schema

The generator infers string primitives, numeric amounts, optional coupons, and emits z.infer export.

INPUT (json)

{
  "orderId": "ORD-98214",
  "customerEmail": "alex@dev.to",
  "amount": 149.99,
  "currency": "USD",
  "itemsCount": 3,
  "discountCode": null
}

OUTPUT (typescript)

import { z } from "zod";

export const OrderSchema = z.object({
  orderId: z.string(),
  customerEmail: z.string().email(),
  amount: z.number(),
  currency: z.string(),
  itemsCount: z.number().int(),
  discountCode: z.string().nullable().optional()
});

export type Order = z.infer<typeof OrderSchema>;

How to Use JSON to Zod Step-by-Step

1Step 1

1. Input JSON Payload

Paste your sample JSON data or API payload into the editor.

2Step 2

2. Select Schema Options

Configure the root schema name, type inference export, and optional property defaults.

3Step 3

3. Inspect Zod Code

Review the generated Zod validation rules with full syntax highlighting.

4Step 4

4. Integrate in Project

Copy the schema directly into your Next.js, Node.js, or React codebase for runtime validation.

Key Features & Capabilities

Generates executable Zod v3 schemas with full object recursion
Produces `z.infer<typeof Schema>` TypeScript type definitions
Smart detection of string formats (dates, UUIDs, URLs, emails)
Configurable optional, nullable, and default property handling
Zero-latency browser-side computation

Practical Production Use Cases

Validate incoming HTTP request bodies in Next.js Server Actions and Route Handlers
Parse and sanitize untrusted external API responses before processing
Create form validation schemas with React Hook Form and Zod resolver
Replace manual runtime type assertions with validated schemas

// PRODUCTIVITY SHORTCUTS

HOTKEYS

Format & beautify input JSON⌘⇧F / Ctrl+Shift+F
Copy generated output to clipboard⌘⇧C / Ctrl+Shift+C
Quick search & switch tools⌘K / Ctrl+K
Toggle dark / light color themed

// PRO TIPS: JSON TO ZOD

BEST PRACTICES

›Enable "Generate Inferred Type" to automatically export static types alongside your schema.
›Use the "Optional Strategy" setting to handle nullable vs omitted API fields appropriately.
›Combine with React Hook Form for instant client-side form validation.