JSON to Zod Schema Generator

Paste JSON and generate a Zod object schema with optional fields and inferred TypeScript type locally.

JSON to Zod workspace

Generate a Zod schema from JSON without calling a server.

Schema nameUnknown keys

Detect email and URLInclude inferred type

JSON input

Zod schema

import * as z from "zod";

export const UserSchema = z.object({
  id: z.number(),
  email: z.email(),
  site: z.url(),
  active: z.boolean(),
  tags: z.array(z.string()),
  profile: z.object({
    name: z.string(),
    bio: z.null()
  })
}).strict();

export type User = z.infer<typeof UserSchema>;

Schema generated locally

Review inferred fields before using the schema for production validation.

Output

15 lines0 optional fieldsstrict

Files are processed in your browser. No data is uploaded.

Questions

Does JSON to Zod upload my JSON?

No. JSON parsing and Zod schema generation run locally in your browser tab.

Can it infer optional fields from arrays?

Yes. When array objects omit a key, that property is marked optional in the generated schema.

Does it generate a perfect production schema?

No. It creates a starter schema from sample JSON. Review constraints, enums, and custom refinements before using it in production.

Does Utilumo upload my input?

No. This tool is designed for local browser processing and does not send your input to a server.

Do I need an account?

No. Utilumo tools are built to work without accounts or sign-in.