JSONStudio — Free Online JSON Formatter, Viewer & Validator

JSON to Zod Schema: a worked example

This is real output from the converter on this page, not an illustration. The input below deliberately includes the cases that trip up naive converters — a float, a null, an empty array, an array of mixed types, and a nested object.

Input JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "score": 9.5,
  "deletedAt": null,
  "tags": [
    "admin",
    "ops"
  ],
  "scores": [],
  "mixed": [
    1,
    "two"
  ],
  "createdAt": "2026-01-15T08:00:00.000Z",
  "profile": {
    "city": "Lisbon",
    "zip": 1000
  },
  "addresses": [
    {
      "line1": "1 Rua Augusta",
      "country": "PT"
    }
  ]
}

Generated Zod Schema

import { z } from "zod";

export const UserSchema = z.object({
  id: z.number(),
  name: z.string(),
  active: z.boolean(),
  score: z.number(),
  deletedAt: z.null().nullable(),
  tags: z.array(z.string()),
  scores: z.array(z.unknown()),
  mixed: z.array(z.unknown()),
  createdAt: z.string(),
  profile: z.object({
  city: z.string(),
  zip: z.number()
}),
  addresses: z.array(z.object({
  line1: z.string(),
  country: z.string()
}))
});

How each JSON type maps to Zod Schema

Every row is generated by running that JSON value through the converter, so the table always matches what the tool actually emits.

JSON typeExample valueGenerated Zod Schema
string"Ada Lovelace"field: z.string()
integer101field: z.number()
float9.5field: z.number()
booleantruefield: z.boolean()
nullnullfield: z.null().nullable()
array of strings["admin", "ops"]field: z.array(z.string())
empty array[]field: z.array(z.unknown())
mixed-type array[1, "two"]field: z.array(z.unknown())
nested object{ "city": "Lisbon" }see the full example above
date-like string"2026-01-15T08:00:00.000Z"field: z.string()

JSON to Zod Schema Converter – Free Online Tool

Convert JSON to Zod Schema instantly with JSONStudio's free online converter. Whether you're a backend developer working with configuration files, a DevOps engineer managing infrastructure as code, or a data analyst processing API responses, ourZod Schema converter provides instant, accurate conversions with zero data uploads.

JSONStudio's JSON to Zod Schema converter runs entirely in your browser, ensuring maximum security and privacy. All processing happens client-side, so your sensitive JSON data never leaves your device. No signup, no tracking, no storage—just fast, reliable conversion when you need it.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's become the de facto standard for API communication, configuration files, and structured data storage. Its human-readable syntax and language-agnostic design make it ideal for modern web development, mobile apps, and microservices architectures.

JSON is used everywhere—from REST APIs and GraphQL responses to configuration files and database exports. Its simplicity and widespread support across programming languages have made it the preferred format for data exchange in modern software development.

What is Zod Schema?

Zod is a TypeScript-first schema declaration and validation library. It is widely used in modern web development to validate API responses, form data, and configuration objects at runtime.

Writing Zod schemas manually can be repetitive. This converter takes your JSON data and generates the corresponding Zod schema code, complete with type inference.

Why Convert JSON to Zod Schema?

  • Runtime validation: Generate schemas to validate data at runtime
  • TypeScript integration: Zod schemas automatically infer static TypeScript types
  • Productivity: Instantly create complex schemas with nested objects and arrays
  • Accuracy: Ensure your validation logic matches your data structure

How to Convert JSON to Zod Schema Online

  1. Paste your JSON: Copy your JSON data from any source—API response, configuration file, or database export—and paste it into the left panel.
  2. Automatic validation: JSONStudio instantly validates your JSON syntax and highlights any errors, ensuring your data is properly formatted before conversion.
  3. Instant conversion: Select "Zod Schema" from the converter dropdown and watch as your JSON transforms into Zod Schema format in real-time.
  4. Copy or download: Use the one-click copy button to copy the converted Zod Schema output, or download it directly to your device.

All conversion happens entirely in your browser using client-side processing. Your JSON data is never uploaded to any server, ensuring complete privacy and security for sensitive information.

Features of JSONStudio JSON to Zod Schema Converter

  • Instant conversion: Real-time conversion with no delays or waiting
  • Large file support: Handle JSON files of any size without performance issues
  • Syntax highlighting: Color-coded output makes it easy to read and verify
  • Error detection: Automatic validation catches JSON syntax errors before conversion
  • One-click copy: Copy converted output to clipboard instantly
  • No signup required: Start converting immediately without creating an account
  • Free forever: All features available at no cost, with no usage limits
  • Dark mode support: Comfortable viewing in any lighting condition

Example JSON to Zod Schema Conversion

Input JSON:

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "active": true
}

Converted Zod Schema:

import { z } from "zod";

export const rootSchema = z.object({
  name: z.string(),
  age: z.number(),
  email: z.string(),
  active: z.boolean(),
});

Is JSONStudio Secure?

100% client-side processing: All JSON conversion happens entirely in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.

No logging or tracking: JSONStudio doesn't log, store, or track any of your JSON data. We don't use analytics that capture your content, and we don't maintain any server-side storage of your files.

No data uploads: Unlike many online converters that upload your files to servers, JSONStudio processes everything locally. This means even if you're working with sensitive API keys, passwords, or proprietary data, it remains completely private.

No server involvement: JSONStudio is a fully static site with no backend server. There is no server to send your data to, even accidentally.

Who Should Use This Tool?

  • TypeScript developers using Zod for validation
  • Frontend developers validating API responses
  • Full-stack developers using tRPC or similar type-safe libraries

Frequently Asked Questions

Does it handle optional fields?

Yes, the converter adds `.optional()` or `.nullable()` modifiers where appropriate.

Can I use the output directly?

Yes, simply copy the code into your TypeScript file. You'll need to have `zod` installed in your project.

Is it secure?

Yes, 100% client-side conversion.

Related Tools

JSONStudio offers a complete suite of JSON tools to help you work with JSON data more effectively: