TypeScript to Zod

Quick answer

Use a TypeScript to Zod converter when your source shape is already an interface or type alias. FrameworkKit parses the snippet locally, generates Zod schema starters, and shows diagnostics for static-only TypeScript constructs that need manual validation choices.

Interface to Zod example

Interfaces with primitives, optional fields, arrays, and nested object literals map cleanly to Zod object schemas. Review generated strings for domain formats after conversion.

interface User {
  id: string;
  email?: string;
  roles: Array<"admin" | "editor">;
  profile: {
    website: string | null;
  };
}

export const UserSchema = z.object({
  id: z.string(),
  email: z.string().optional(),
  roles: z.array(z.enum(["admin", "editor"])),
  profile: z.object({
    website: z.string().nullable(),
  }).strict(),
}).strict();

Type alias to Zod example

Object type aliases are useful for DTOs and API response models. Literal unions, nullable fields, and dictionaries become copy-ready Zod starters.

type Product = {
  sku: string;
  status: "draft" | "active" | "archived";
  price: number | null;
  metadata: Record<string, string>;
};

Local references and dependency order

When one pasted declaration references another local interface or type alias, generate the referenced schema first and then use it in the dependent schema.

interface Address {
  city: string;
}

interface Customer {
  address: Address;
  previousAddresses?: Address[];
}

Unsupported TypeScript features

Generics, mapped types, conditional types, imported references, classes, functions, namespaces, and indexed access types are static TypeScript features that do not automatically describe runtime validation. Treat diagnostics as review prompts.

• Keep fallback output as `z.unknown()` unless legacy code truly needs `z.any()`.
• Replace imported references with local declarations when you want the converter to resolve them.
• Model conditional or mapped types manually with explicit Zod objects, unions, or records.

JSON to Zod vs TypeScript to Zod

Use JSON to Zod when you have a real sample payload. Use TypeScript to Zod when your contract already exists as DTO interfaces, SDK response types, or hand-written type aliases.

Production checklist

Generated schemas are a starting point. Add domain constraints, tests, and API error handling before treating the output as production validation code.

• Add `.email()`, `.url()`, `.uuid()`, `.datetime()`, `.min()`, and `.max()` where the contract requires formats or limits.
• Write valid and invalid fixtures for API boundaries.
• Review unsupported diagnostics before copying output into a shared codebase.

TypeScript to Zod conversion map

Use FrameworkKit to generate the starter code, then review the output before shipping it in production.

TypeScript and Zod resources

FAQ

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