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Json-Schema-to-Zod

NPM Version NPM Downloads

Looking for the exact opposite? Check out zod-to-json-schema

Summary

A runtime package and CLI tool to convert JSON schema (draft 4+) objects or files into Zod schemas in the form of JavaScript code. Uses Prettier for formatting, .

Usage

Online

Just paste your JSON schemas here!

CLI

Installation:

npm i -g json-schema-to-zod

Example:

json-schema-to-zod -s myJson.json -t mySchema.ts

Options

Flag Shorthand Function
--source -s Source file name (required)
--target -t Target file name
--name -n The name of the schema in the output
--deref -d Uses json-schema-ref-parser to dereference the schema
--without-defaults -wd Ignore default values in the schema

Programmatic

jsonSchemaToZod will output the full module code, including a Zod import. If you only need the Zod schema itself, try one of the parsers directly. If you need to deref your JSON schema, try awaiting jsonSchemaDereffed.

import {
  jsonSchemaToZod,
  jsonSchemaToZodDereffed,
  parseSchema,
} from "json-schema-to-zod";

const myObject = {
  type: "object",
  properties: {
    hello: {
      type: "string",
    },
  },
};

const module = jsonSchemaToZod(myObject);

const dereffed = await jsonSchemaToZodDereffed(myObject);

const schema = parseSchema(myObject);

module/dereffed =

import { z } from "zod";

export default z.object({ hello: z.string().optional() });

schema =

z.object({ hello: z.string().optional() });

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  • TypeScript 85.4%
  • JavaScript 14.6%