TypeScript → Zod

Generates a Zod schema from a simple TypeScript interface.

TypeScript to Zod converts a single TypeScript interface or type-object into a matching Zod validation schema right in your browser. Paste an interface like `interface User { id: number; name: string }` and get back ready-to-use `z.object()` code with a `import { z } from "zod"` line and an exported schema. It is handy when you want runtime validation that mirrors your existing TypeScript types without writing the Zod schema by hand.

Common uses

  • Turn an API response interface into a Zod schema for validating untrusted input at runtime
  • Bootstrap form or request-body validation from types you already have
  • Convert optional fields (`field?: type`) into `.optional()` Zod chains automatically
  • Map string literal unions like `'a' | 'b'` to `z.enum([...])` for safe state values
  • Generate a starting point for nested object and array types, then refine the schema by hand

FAQ

Is my data sent to a server?

No. The conversion runs entirely in your browser using JavaScript, and nothing you paste is uploaded or stored anywhere. The whole site is client-side and open source so you can verify it.

What TypeScript constructs are supported?

A single `interface Name { ... }` or `type Name = { ... }` (optionally prefixed with `export`). It handles string, number, boolean, null, any/unknown, arrays (`T[]` and `Array<T>`), inline nested objects, unions, optional members with `?`, and string-literal unions which become `z.enum`.

How are unknown or custom types handled?

Types it does not recognize (such as custom interfaces, Date, or generics) are mapped to `z.unknown()`. Replace those with the correct schema after generating, since the tool does not resolve references to other types.

Can I convert multiple interfaces at once?

No. The tool parses exactly one interface or type-object per run. Convert each type separately and combine the resulting schemas in your code.

Why does it fail to parse my input?

Parsing requires a complete interface or type-object declaration; bare object bodies, enums, function types, or multiple declarations are not accepted. Each member must be in `field: type` form, or the tool throws an error.

Related tools

  • JSON → GraphQL Type
  • JSON → JSON Schema
  • JSON → Protobuf
  • JSON → TypeScript
  • JSON → Types (multi-language)
  • JSON → Zod
  • JSON Schema → Sample
  • JSON Schema → TypeScript