Zod 4 Has a Free API — The Fastest TypeScript Schema Validation Yet

What if your schema validation library was 100x faster, tree-shakeable, and still had the same API you already know? Zod 4 is the next major version of the most popular TypeScript-first schema validation library — rebuilt from scratch for performance. What Changed in Zod 4 Zod 3 was the gold standard for TypeScript validation, but it had performance issues at scale. Zod 4 fixes everything: 100x faster parsing in benchmarks Tree-shakeable — only pay for what you use (7kb min for basic schemas) JSON Schema output — native toJSONSchema method Recursive types — no more z.lazy workarounds Better error messages — structured error formatting built-in Quick Start npm install zod@next import { z } from " zod " ; const UserSchema = z . object ({ name : z . string (). min ( 1 ), email : z . email (), age : z . number (). min ( 18 ). max ( 120 ), role : z . enum ([ " admin " , " user " , " moderator " ]), }); type User = z . infer < typeof UserSchema > ; const user = UserSchema . parse ( requestBo