Intro | Zod

# Zod > Zod is a TypeScript-first schema validation library with static type inference. This documentation provides comprehensive coverage of Zod 4's features, API, and usage patterns. ## Defining schemas - [Defining schemas](https://zod.dev/api): Complete API reference for all Zod schema types, methods, and validation features - [Primitives](https://zod.dev/api?id=primitives) - [Coercion](https://zod.dev/api?id=coercion) - [Literals](https://zod.dev/api?id=literals) - [Strings](https://zod.dev/api?id=strings) - [String formats](https://zod.dev/api?id=string-formats) - [Emails](https://zod.dev/api?id=emails) - [UUIDs](https://zod.dev/api?id=uuids) - [URLs](https://zod.dev/api?id=urls) - [ISO datetimes](https://zod.dev/api?id=iso-datetimes) - [ISO dates](https://zod.dev/api?id=iso-dates) - [ISO times](https://zod.dev/api?id=iso-times) - [IP addresses](https://zod.dev/api?id=ip-addresses) - [IP blocks (CIDR)](https://zod.dev/api?id=ip-blocks-cidr) - [MAC Addresses](https://zod.dev/api?id=mac-addresses) - [JWTs](https://zod.dev/api?id=jwts) - [Hashes](https://zod.dev/api?id=hashes) - [Custom formats](https://zod.dev/api?id=custom-formats) - [Template literals](https://zod.dev/api?id=template-literals) - [Numbers](https://zod.dev/api?id=numbers) - [Integers](https://zod.dev/api?id=integers) - [BigInts](https://zod.dev/api?id=bigints) - [Booleans](https://zod.dev/api?id=booleans) - [Dates](https://zod.dev/api?id=dates) - [Enums](https://zod.dev/api?id=enums) - [.enum](https://zod.dev/api?id=enum) - [.exclude()](https://zod.dev/api?id=exclude) - [.extract()](https://zod.dev/api?id=extract) - [Stringbools](https://zod.dev/api?id=stringbool) - [Optionals](https://zod.dev/api?id=optionals) - [Nullables](https://zod.dev/api?id=nullables) - [Nullish](https://zod.dev/api?id=nullish) - [Unknown](https://zod.dev/api?id=unknown) - [Never](https://zod.dev/api?id=never) - [Objects](https://zod.dev/api?id=objects) - [z.strictObject](https://zod.dev/api?id=zstrictobject) - [z.loos