JavaScript to Zod Schema (2026) ✨

Example Input

{
  user: { id: 1, name: "Kai" },
  active: true,
  tags: ["a", "b"],
}

Expected Output

import { z } from "zod";

export const UserSchema = z.object({
  user: z.object({ id: z.number(), name: z.string() }),
  active: z.boolean(),
  tags: z.array(z.string()),
});

What is JavaScript to Zod Schema? 🧭

JS Object to Zod parses a JavaScript object literal, accepts only JSON-compatible literal values, and infers a Zod schema from the resulting data. Conversion runs in your browser without executing pasted code.

What can it do? ✅

• Accept unquoted property names, single-quoted strings, and trailing commas.
• Infer nested Zod objects, arrays, strings, numbers, and booleans.
• Choose the exported root schema name.
• Format generated TypeScript before copying.

Options Explained

• Root Schema Name controls the exported Zod constant name.
• Use a representative sample because inference only sees values present in the object.

Common Errors

• Invalid JavaScript syntax prevents the object literal from being parsed.
• Functions, calls, getters, spread syntax, and BigInt are rejected because they are not JSON-compatible literal data.
• A root name that is not a valid JavaScript identifier produces invalid generated code.

Limitations

• Only object, array, string, number, boolean, and null literals are accepted.
• Variables, undefined, NaN, Infinity, computed keys, methods, and executable expressions are rejected.
• A single sample cannot prove which properties are optional.
• Generated schemas still require review before production use.

Free vs Paid 💸

This tool is 100% free with no usage limits or account required. You can use it for quick conversions without subscriptions or payments.

Official vs Third-Party 🧪

Folioify provides this as a third-party utility. It does not replace official tools, but offers a fast, accessible alternative for everyday workflows.