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JSON to Zod Schema

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Turn JSON into a Zod schema.

All generated data is fictional and intended for development, testing, QA, prototyping, and automation only. Do not use it for fraud, impersonation, or illegal activity.

Configuration

Output· 15 lines · typescript
import { z } from "zod";

export const rootSchema = z.object({
  id: z.number(),
  name: z.string(),
  active: z.boolean(),
  roles: z.array(z.string()),
  profile: z.object({
    age: z.number(),
    country: z.string(),
  }),
});

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

About this tool

Generate a Zod schema from a sample payload to validate structured output from APIs and LLM tool calls at runtime. Null values merged with a type produce a .nullable() field.

Example output

import { z } from "zod";

export const rootSchema = z.object({
  id: z.number(),
  name: z.string(),
  active: z.boolean(),
  roles: z.array(z.string()),
  profile: z.object({
    age: z.number(),
    country: z.string(),
  }),
});

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

Frequently asked questions

Why validate LLM output with Zod?
LLMs can return malformed structures; a Zod schema lets you parse-and-fail-fast before trusting the data.

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