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JSON to Zod Schema Generator — Runtime Validation From an Example

Paste a JSON example to generate a matching Zod schema — the runtime validation library many TypeScript projects use to validate data at the boundary (API responses, form input) since TypeScript's own types vanish at runtime and cannot actually catch malformed data.

How to use JSON to Zod

1. Paste your JSON.
2. Review the generated Zod schema.
3. Copy it into your project.

Frequently asked questions

Why do I need Zod if I already have TypeScript types?

TypeScript types are erased at compile time and provide no runtime protection — Zod actually validates incoming data (like an API response) at runtime and can also infer a matching TypeScript type from the same schema definition.

Does it infer optional fields correctly?

Fields present in your example are treated as required by default; mark any that are genuinely optional with .optional() after generation, since a single example cannot reveal that.

Can I get a TypeScript type from the generated schema?

Yes — Zod schemas support z.infer<typeof schema> to derive a matching TypeScript type directly from the schema you generate here.

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