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JSON to Zod Schema

Generate a strict Zod v3 schema from any JSON sample — optionals, enums for repeated strings and clean reusable definitions.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Paste JSON
  2. Name your schema
  3. Copy the Zod code

Zod schema

import { z } from "zod";

export const Root = z.object({
  id: z.number().int(),
  email: z.string(),
  tags: z.array(z.string()),
  owner: Owner,
  createdAt: z.string().datetime({ offset: true }),
}).strict();
export type Root = z.infer<typeof Root>;

export const Owner = z.object({
  name: z.string(),
  verified: z.boolean(),
}).strict();
export type Owner = z.infer<typeof Owner>;
How this works
  • Each object becomes its own named z.object(...), with arrays of objects merged into a single shape so optionals are detected.
  • Keys present in some — but not all — items in an array of objects become .optional() automatically.
  • Everything runs locally. Paste freely — the JSON never leaves your device.

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