Zod

Founded by Colin McDonnell in 2020

Validate data structures and infer static types for TypeScript and JavaScript applications

Pricing model

Free

Rating

★ People love it

Time to value

Quick Setup (< 1 hour)

You can use Zod to define data schemas and validate untrusted inputs in TypeScript and JavaScript applications. It lets you compose simple validation rules for primitive data types or assemble complex nested object schemas. When data passes validation, it provides full static type inference without declaring types separately. You can use it across Node.js environments and modern web browsers with zero external dependencies. It also converts schemas directly into JSON Schema, customizes parsing error messages, and connects with form libraries and API frameworks.

What Zod does

Define schema rules for complex nested data objectsParse raw JSON strings into type-safe data structuresGenerate TypeScript type definitions directly from schemasHandle validation errors with custom error messagesCoerce input data types automatically during parsingConvert schemas into standard JSON Schema representationsCompose reusable validation rules across multiple endpointsStatic type inference from defined schemasZero external runtime dependenciesLightweight bundle size with a compact coreBuilt-in conversion to JSON SchemaCustom error formatting and localized messagesImmutable schema methods that return fresh instancesCompatibility with both TypeScript and plain JavaScript