JSON to Zod schema

How to use it

1. Enter json input and root type name.
2. The result appears straight away and updates as you edit.
3. Copy the result, or copy a link that keeps the same values to share it.

How it is calculated

z.string(), z.number(), z.number().int(), z.boolean(), z.array() and z.unknown(), with a separate schema per nested object declared before use. .nullable() for null values and .optional() for keys missing from some items, then the type is exported with z.infer.

Example

Inputs: Root type name = Root. Result: Generated code: import { z } from "zod"; const OrderSchema = z.object({ order_id: z.string(), total: z.number(), coupon: z.string().nullable(), }); const AddressSchema = z.object({ city: z.string(), postal_code: z.string(), }); export const RootSchema = z.object({ id: z.number().int(), name: z.string(), email: z.string(), is_active: z.boolean(), balance: z.number(), tags: z.array(z.string()), address: AddressSchema, orders: z.array(OrderSchema), }); export type Root = z.infer<typeof RootSchema>;; Types generated: 3; Fields: 13.

{
  "id": 1024,
  "name": "Sara Ahmed",
  "email": "sara@example.com",
  "is_active": true,
  "balance": 1520.75,
  "tags": ["vip", "riyadh"],
  "address": { "city": "Riyadh", "postal_code": "12211" },
  "orders": [
    { "order_id": "A-1", "total": 99.5, "coupon": "EID10" },
    { "order_id": "A-2", "total": 120, "coupon": null }
  ]
}

import { z } from "zod";

const OrderSchema = z.object({
  order_id: z.string(),
  total: z.number(),
  coupon: z.string().nullable(),
});

const AddressSchema = z.object({
  city: z.string(),
  postal_code: z.string(),
});

export const RootSchema = z.object({
  id: z.number().int(),
  name: z.string(),
  email: z.string(),
  is_active: z.boolean(),
  balance: z.number(),
  tags: z.array(z.string()),
  address: AddressSchema,
  orders: z.array(OrderSchema),
});

export type Root = z.infer<typeof RootSchema>;

Limits and caveats

• It uses only the core functions shared by Zod 3 and Zod 4.
• It adds no refinements such as .email() or .min(); add them to fit your data rules.