Zod

TypeScript-first schema validation with static type inference

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Zod 4 is now stable! Read the release notes here.

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Introduction

Zod is a TypeScript-first validation library. Using Zod, you can define schemas you can use to validate data, from a simple string to a complex nested object.

import { z } from "zod/v4";
 
const User = z.object({
  name: z.string(),
});
 
// some untrusted data...
const input = { /* stuff */ };
 
// the parsed result is validated and type safe!
const data = User.parse(input);
 
// so you can use it with confidence :)
console.log(data.name);

Features

Zero external dependencies
Works in Node.js and all modern browsers
Tiny: 2kb core bundle (gzipped)
Immutable API: methods return a new instance
Concise interface
Works with TypeScript and plain JS
Built-in JSON Schema conversion
Extensive ecosystem

Installation

npm install zod       # npm
deno add npm:zod      # deno
yarn add zod          # yarn
bun add zod           # bun
pnpm add zod          # pnpm

Zod also publishes a canary version on every commit. To install the canary:

npm install zod@canary       # npm
deno add npm:zod@canary      # deno
yarn add zod@canary          # yarn
bun add zod@canary           # bun
pnpm add zod@canary          # pnpm

Requirements

Zod is tested against TypeScript v5.5 and later. Older versions may work but are not officially supported.

`"strict"`

You must enable strict mode in your tsconfig.json. This is a best practice for all TypeScript projects.

// tsconfig.json
{
  // ...
  "compilerOptions": {
    // ...
    "strict": true
  }
}

`"moduleResolution"`

Your "moduleResolution" should be set to one of the following. The legacy "node" and "classic" modes are not supported, as they do not support subpath imports.