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Generate Zod Schemas from JSON Samples

Infer a Zod schema from sample JSON in your browser and emit TypeScript validation code. Nested objects and arrays are supported, with optional strict mode and z.infer type export—useful for API validation work.

Quick switch→JSON Schema Validator

JSONTypeScriptZod

Quick switch:JSON Schema Validator JSON to TypeScript Interface

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Use cases

Generate request-body schemas for tRPC or Next.js handlers
Add frontend validation from a backend sample payload
Turn existing JSON config into typed Zod definitions

How to use

Paste a JSON sample
Optionally enable strict mode and z.infer export
Copy the generated Zod code

Example input and output

JSON sample

{"name":"Ada","age":36}

Generated schema

z.object({ name: z.string(), age: z.number() })

FAQ

What does strict mode do?

Object schemas append .strict() so unexpected fields not present in the sample are rejected.

Are nested objects and arrays detected?

Yes. Nesting is inferred recursively. Arrays use the first element’s type; empty arrays become z.array(z.any()).

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