JSON to Zod Schema Generator Online

Generate Zod schemas from JSON sample data

Zod is a popular TypeScript-first schema validation library. Defining validators by hand for nested API payloads takes time, especially when fields evolve during development. This tool converts a JSON sample into a Zod schema you can paste into Node.js, Next.js, or tRPC projects.

What this tool does

Paste JSON in the input panel. The converter walks your sample object and builds a Zod schema with z.string(), z.number(), z.object(), and nested array validators. Output updates in real time as you edit the JSON or schema name.

Configuration options

Root Schema Name: Set the exported Zod schema constant name.
ES module export: Toggle between a standalone schema snippet and a module with import { z } from "zod".

JSON to Zod vs JSON Schema to Zod

This tool infers validators from a JSON sample. If you already have a JSON Schema document, use the JSON Schema to Zod converter for constraint-aware output such as minLength, enum, and required fields.

Related tools

Generate TypeScript interfaces from the same JSON with the JSON to TypeScript POJO Generator, or create a JSON Schema first using the JSON to JSON Schema Generator.

Frequently Asked Questions

Does my JSON leave the browser?

No. Schema generation runs locally in your browser. Your sample data is not sent to any server.

Can this handle nested objects and arrays?

Yes. Nested objects become z.object() validators and arrays become z.array() with item schemas inferred from your sample elements.

Are circular JSON structures supported?

No. Circular references in JSON samples are not supported and will produce an error message in the output panel.

Should I use module export format?

Enable module export when you plan to drop the schema directly into a TypeScript file. Disable it when you only need the schema expression for documentation or quick testing.

Report

JSON To Zod