JSON to Zod / Yup / Prisma Schema

Q: Which schema format should I use?

Use Zod for new TypeScript projects — it has better type inference and is more performant. Use Yup if you're already using Formik. Use Prisma when defining your database models.

Generate validation schemas from JSON data.

JSON Input Example

Target:

Generated Schema

What are Zod, Yup, and Prisma?

Zod is a TypeScript-first schema validation library. It infers TypeScript types from schemas, supports nested objects, arrays, unions, and transforms.

Yup is a JavaScript schema builder for value parsing and validation. It is commonly used with Formik for form validation in React.

Prisma is an ORM for Node.js and TypeScript. Its schema file (schema.prisma) defines database models with types, relations, and attributes.

How to Use

Paste your JSON — Paste a sample JSON object into the input area. Use the "Example" link to load a realistic payload with nested objects, arrays, and mixed types.
Choose a target — Select the schema format you need: Zod Schema, Yup Schema, or Prisma Model.
Click "Generate" — The tool converts the JSON structure into the matching validation schema or model definition.
Copy the output — Copy the generated schema with the Copy button, along with the import line shown above it, and paste it into your project.

Frequently Asked Questions

Which schema format should I use?

Use Zod for new TypeScript projects — it has better type inference and is more performant. Use Yup if you're already using Formik. Use Prisma when defining your database models.

Is my JSON data stored on a server?

No. All processing happens entirely in your browser using JavaScript. Your data never leaves your device.

Does this handle nested objects and arrays?

Yes. The generator recursively processes nested objects, arrays, and mixed types. Each nested object generates its own schema, and arrays are wrapped with the appropriate array type.