ArkType

Overview

ArkType is a runtime validation library that uses TypeScript's own syntax for type definitions. Instead of learning a new API (z.string().email()), you write types the way you already know ("string.email"). It's the fastest TypeScript validator — 100x faster than Zod for complex schemas — with better error messages and 1:1 correspondence between your types and validators.

When to Use

• Runtime validation where performance matters (hot paths, large payloads)
• Want to write validators using TypeScript syntax (not a builder API)
• Need detailed, human-readable error messages
• Replacing Zod in performance-critical applications
• Type-safe data transformations (morphs)

Instructions

Setup