⚡ JSON to Zod Schema

Convert any JSON object to a TypeScript Zod validation schema instantly. Supports nested objects, arrays, and all primitive types.

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How to Use JSON to Zod Schema

Follow these steps to get the best results.

1
Paste your JSON
Paste any valid JSON object into the input area on the left. Use the Load Sample button to see an example with nested objects and arrays.
2
Review the generated schema
The Zod schema appears instantly on the right, complete with the import statement and TypeScript type export.
3
Copy and use
Click Copy to copy the complete schema to your clipboard, ready to paste into your TypeScript project.

Why Use This Tool?

Zod is the most widely adopted TypeScript validation library, used by millions of developers across React, Next.js, Node.js, and tRPC projects. Writing Zod schemas by hand for complex API responses or database records is tedious and error-prone — especially for deeply nested objects with many fields. This tool automates the most time-consuming part: inferring the correct Zod type for each field based on its value. It also detects common string patterns (email addresses, URLs, ISO dates) and generates the appropriate Zod refinements automatically.

Frequently Asked Questions — JSON to Zod Schema

What is Zod?
Zod is a TypeScript-first schema validation library. It lets you define the expected shape and types of data, then validate incoming data against that schema at runtime — catching type errors before they cause bugs.
Does it handle nested objects?
Yes. The converter recursively processes nested objects and arrays of any depth, generating correctly indented nested z.object() and z.array() schemas.
Can it detect email and URL fields?
Yes. If a string value matches an email format (contains @ and a domain), it generates z.string().email(). URL-shaped strings generate z.string().url(). ISO date strings generate z.string().datetime().
What happens with null values?
Null values generate z.null(). If you expect a field to be nullable at runtime, manually change it to z.string().nullable() or z.union([z.string(), z.null()]) as appropriate for your use case.
Does it support optional fields?
The generator infers types from the values present in the sample JSON. To mark fields as optional, manually append .optional() to the relevant field schemas after generating.

About JSON to Zod Schema

Zod is a schema declaration and validation library for TypeScript that has become the de-facto standard for runtime data validation in the modern JavaScript ecosystem. Unlike TypeScript's compile-time type system, Zod validates data at runtime — essential for validating data from external sources like API responses, form inputs, and database queries where TypeScript's static guarantees do not apply. This converter analyses a JSON object's structure and value types to infer the most precise Zod schema possible, including smart detection of string formats like email addresses and URLs. The output is production-ready TypeScript code that can be dropped directly into any project using Zod v3+.

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