TypeScript to Zod Converter
Convert TypeScript interfaces and types to Zod validation schemas with AI — free, no login required.
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(),
});
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How to Convert TypeScript interfaces to Zod
TypeScript interfaces provide compile-time type safety, but they cannot validate runtime data — API responses, form inputs, and user data arrive as unknown and need runtime validation. Zod schemas provide both TypeScript types and runtime validation from a single source of truth.
The TypeScript to Zod converter generates Zod schema definitions from your existing TypeScript interfaces. Paste any TypeScript type or interface and get a matching Zod schema with full validation logic.
Why Use a TypeScript interfaces to Zod Converter?
- →Validate API responses at runtime against TypeScript interface shapes
- →Eliminate duplicate type definitions — derive TypeScript types from Zod schemas
- →Add runtime validation to form data, environment variables, and user input
- →Get parse errors with field-level detail when data does not match expected shape
What the TypeScript to Zod Converter Handles
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.
Why convert TypeScript to Zod?
TypeScript types are erased at runtime — they cannot validate data that arrives from outside your application. Zod validates data at runtime AND infers TypeScript types. Converting TypeScript to Zod adds runtime safety without duplicating your type definitions.
What is the difference between TypeScript interfaces and Zod schemas?
TypeScript interfaces are compile-time constructs — they describe shapes for type checking but produce no runtime code. Zod schemas are runtime objects that validate data AND can infer TypeScript types via z.infer<typeof schema>.
How do I use a Zod schema to validate an API response?
const result = MySchema.safeParse(apiResponse); if (!result.success) { console.error(result.error); } else { const data = result.data; // fully typed }. Use .parse() to throw on failure or .safeParse() to handle errors gracefully.
Can Zod replace TypeScript interfaces entirely?
Yes. Define your schema with Zod, then derive the TypeScript type: type MyType = z.infer<typeof MySchema>. This gives you one source of truth — validation and types from the same definition.
How do optional TypeScript fields convert to Zod?
TypeScript optional fields (field?: string) become .optional() in Zod: z.object({ field: z.string().optional() }). Nullable fields (field: string | null) become z.string().nullable().