Why convert TypeScript to Zod instead of the other way around?

Zod adds runtime validation on top of TypeScript's compile-time checks. If you have existing TypeScript interfaces for API responses or form data, converting them to Zod lets you validate real data at runtime and catch errors that TypeScript alone cannot.

Does it handle optional and union types?

Yes. Optional fields (?) become .optional(), union types (A | B) become z.union([z.A(), z.B()]), and null types become z.null().

TypeScript to Zod

Convert TypeScript interfaces to Zod schemas with AI.

You already have TypeScript interfaces — now add runtime validation with Zod. Paste any TypeScript interface or type alias and get a complete Zod schema with the exported z.infer<> type, ready to drop into your project.

Paste your code, then click Convert

Zod Schema

How to use this tool?

This online converter harnesses AI to translate TypeScript interfaces and types to Zod schemas. Follow these steps:

Type or paste your TypeScript interface or type alias into the input box provided.
Click the "Convert" button to generate the equivalent Zod schema.
View the Zod schema and inferred type in the output box, ready to use in your project.

Example: Simple Function

TypeScript

interface User {
  id: number;
  name: string;
  email?: string;
  active: boolean;
}

Zod Schema

import { z } from 'zod';

export const UserSchema = z.object({
  id: z.number(),
  name: z.string(),
  email: z.string().optional(),
  active: z.boolean(),
});

export type User = z.infer<typeof UserSchema>;

Frequently Asked Questions

Why convert TypeScript to Zod?

Zod adds runtime validation on top of TypeScript's compile-time checks. Converting existing interfaces to Zod lets you validate API responses, form inputs, and environment variables at runtime — catching errors that TypeScript alone cannot.

Does it handle optional fields and union types?

Yes. Optional fields (?) become .optional(), union types (string | number) become z.union([z.string(), z.number()]), and null becomes z.null().

What about nested interfaces?

Nested interfaces become nested z.object() calls. Each nested type is converted recursively and referenced inline in the parent schema.

Do I need to install anything?

To use the generated schema in your project, run: npm install zod. The output includes the required import { z } from 'zod' statement.

Is the tool free?

Yes, completely free with no account required.