arktype-validation
ArkType Validation
Overview
ArkType is a TypeScript-native runtime validation library that defines schemas using string expressions mirroring TypeScript syntax, providing editor autocomplete, syntax highlighting, and optimized validators. Use when building type-safe APIs, validating JSON payloads, or replacing Zod with a more TypeScript-idiomatic approach. Not suitable for projects that need Zod ecosystem compatibility or JSON Schema output.
Package: arktype
Quick Reference
| Pattern | Usage |
|---|---|
type({ key: "string" }) |
Define object schema |
type("string") |
Primitive type |
"string.email", "string.url" |
Built-in string validators |
"string.trim", "string.lower" |
Built-in string morphs (transforms) |
"string.json.parse" |
Parse JSON string to validated object |
"number > 0", "string >= 1" |
Inline constraints |
"string | number" |
Union types |
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