TypeScript to Zod Schema Converter
Paste a TypeScript interface or type to instantly generate a matching Zod schema for runtime validation. Free online developer tool.
Paste TypeScript
Zod Schema
Zod schema output will appear here...
Free TypeScript to Zod Schema Converter
Paste a TypeScript interface or type to instantly generate a matchingZod schema you can use to validate data at runtime.
How to Use It
Paste TypeScript source into the input box, or click "Load Example." The tool parses the first top-level interface or type declaration with the TypeScript compiler, resolving any other top-level interfaces it references by name, and emits az.object({...}) schema for every object level, pulling nested objects out into their own named schema constant, wrapping arrays in z.array(...), and chaining.nullable() and/or .optional() onto any field marked that way in your source.
Example
Given an Address interface with an optional zip field and a User interface referencing it, the tool emits a UserAddressSchema withzip: z.string().optional(), plus a UserSchema that references it, withtags: z.array(z.string()).
Common Use Cases
- Adding runtime validation to a codebase that already has TypeScript types but no Zod schemas.
- Generating a starting schema for a tRPC or Next.js Server Action input type from an interface.
- Validating API responses at runtime against types you've already written.
FAQs
Does this support more than one interface at a time?
The tool converts the first top-level interface or type in your input as the root schema. If that root type references other top-level interfaces from the same file by name (likeaddress: Address), those are resolved and inlined as nested schemas automatically — but interfaces that aren't referenced from the root are ignored.
Does the generated code include a Zod import?
No — only the schema declarations are generated. Add import { z } from "zod";at the top of the file where you paste the output.
Is my TypeScript uploaded anywhere?
No — parsing and schema generation happen entirely client-side in your browser, using the TypeScript compiler loaded on demand. Nothing you paste is sent to a server.