# Zod — TypeScript-First Schema Validation

> TypeScript-first schema declaration and validation library. Define a schema once, get type inference, runtime validation, and serialization. The standard for TypeScript data validation. 35,000+ stars.

## Install

Save as a script file and run:

## Quick Use

```bash
npm install zod
```

```typescript
import { z } from "zod";

const UserSchema = z.object({
  name: z.string().min(2),
  email: z.string().email(),
  age: z.number().int().min(0),
  role: z.enum(["admin", "user"]),
});

type User = z.infer<typeof UserSchema>;
const user = UserSchema.parse(data);
```

---

## Intro

Zod is a TypeScript-first schema declaration and validation library with 35,000+ GitHub stars. Define a schema once and get both TypeScript type inference and runtime validation. Used by tRPC, Vercel AI SDK, React Hook Form, and Drizzle ORM. Best for TypeScript developers who want type-safe validation at API boundaries. Works with: any TypeScript project. Setup time: instant.

---

## Core Features

### Type Inference from Schema
```typescript
const Schema = z.object({ name: z.string(), age: z.number() });
type T = z.infer<typeof Schema>; // { name: string; age: number }
```

### API Validation
```typescript
const body = CreatePostSchema.parse(await req.json());
```

### AI SDK Integration
```typescript
const { object } = await generateObject({
  model: anthropic("claude-sonnet-4-20250514"),
  schema: z.object({ summary: z.string(), keywords: z.array(z.string()) }),
  prompt: "Analyze...",
});
```

### Key Stats
- 35,000+ GitHub stars
- Zero dependencies, 12KB
- Used by tRPC, AI SDK, React Hook Form

### FAQ

**Q: What is Zod?**
A: TypeScript-first schema library providing both compile-time type inference and runtime validation from a single schema definition.

**Q: Is Zod free?**
A: Yes, MIT license.

---

## Source & Thanks

> Created by [Colin McDonnell](https://github.com/colinhacks). Licensed under MIT.
>
> [zod](https://github.com/colinhacks/zod) — stars 35,000+

---

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## 快速使用

```bash
npm install zod
```

```typescript
import { z } from "zod";
const Schema = z.object({ name: z.string(), email: z.string().email() });
type T = z.infer<typeof Schema>;
```

---

## 简介

Zod 是 TypeScript 优先的数据验证库，GitHub 35,000+ stars。一次定义 schema，同时获得类型推断和运行时验证。

---

## 来源与感谢

> Created by [Colin McDonnell](https://github.com/colinhacks). Licensed under MIT.
>
> [zod](https://github.com/colinhacks/zod) — stars 35,000+

---
Source: https://tokrepo.com/en/workflows/5328f7ec-37d8-47bc-afb5-034b66d1537d
Author: Script Depot