Zod Has a Free Schema Library That Makes TypeScript Validation Effortless

TypeScript types disappear at runtime. That means your API inputs, form data, and environment variables are unvalidated in production. Zod fixes this — define a schema once, get both TypeScript types AND runtime validation. What Zod Gives You for Free Schema-first validation — define once, validate everywhere Type inference — z.infer<typeof schema> gives you the TypeScript type Composable — merge, extend, pick, omit schemas Transforms — parse and transform data in one step Error messages — detailed, customizable validation errors Zero dependencies — 13KB minified Works everywhere — browser, Node.js, Deno, Bun, Cloudflare Workers Quick Start npm install zod Basic Schemas import { z } from ' zod ' ; // Primitive types const name = z . string (). min ( 2 ). max ( 100 ); const age = z . number (). int (). positive (). max ( 150 ); const email = z . string (). email (); const isActive = z . boolean (); // Object schemas const UserSchema = z . object ({ name : z . string (). min ( 2 ), email