What is Zod and why should I use it?

Zod is a TypeScript-first schema declaration and validation library. It lets you define your data shapes with types and validate them at runtime, catching bugs early. It's widely used with Next.js, tRPC, and React Hook Form.

Does this tool handle nested JSON objects?

Yes. The converter recursively walks your JSON structure and generates nested z.object() schemas for every level of nesting, including arrays of objects.

How are null values handled?

JSON null values are converted to z.null(). When a field can be either a value or null, the tool generates z.union([z.string(), z.null()]) or z.string().nullable() depending on the selected mode.

Can I make all fields optional?

Yes. Toggle the 'Optional Fields' switch to wrap all schema fields with .optional(), which is useful when working with partial data shapes or API responses with missing fields.

Is my JSON data sent to a server?

No. All processing happens entirely in your browser using JavaScript. Your JSON data never leaves your device.

What version of Zod does this generate code for?

The generated code is compatible with Zod v3 and v4 (the API is stable across versions for basic schemas). Import with: import { z } from 'zod'.

Free Zod Schema Generator

Convert JSON to
Zod Schemas

Paste any JSON and instantly get a fully typed Zod schema. Handles nested objects, arrays, union types, and nullable fields — ready to copy into your TypeScript project.

⚡

Instant Conversion

Paste JSON and get a Zod schema in milliseconds. Real-time updates as you type.

🔗

Deep Nesting

Handles deeply nested objects, arrays, union types, nullable and optional fields.

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100% Client-Side

Your JSON never leaves your browser. No server uploads, no accounts required.

Schema name:

Optional fields

Include import

Examples:

JSON Input

Zod Schema

Paste JSON to generate schema

Frequently Asked Questions

Everything you need to know about JSON to Zod.

Convert JSON toZod Schemas

Instant Conversion

Deep Nesting

100% Client-Side

Frequently Asked Questions

Convert JSON to
Zod Schemas