Zod

Overview

Zod is a TypeScript-first schema validation library with static type inference. Define a schema once; you get both runtime validation and a TypeScript type (via z.infer). Zero external dependencies; works in Node and browsers. Ideal for forms (e.g. with react-hook-form), API parsing, env vars, and any untrusted input.

Requirements: TypeScript 5.5+ recommended; enable strict in tsconfig.json.

Install: Add zod via your package manager. See zod.dev.

Quick start

import { z } from "zod";