Zod JSON Schema

Zod v4 has native z.toJSONSchema() for converting Zod schemas to JSON Schema. This skill covers the options, gotchas, and patterns for using it correctly.

Basic usage

import { z } from 'zod'

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

z.toJSONSchema(schema)
// { type: 'object', properties: { name: { type: 'string' }, age: { type: 'number' } }, ... }