arktype

Use syntax-first schemas to validate API data and ensure zero-drift type inference in TypeScript. Schemas read like native TypeScript types, providing immediate runtime validation and static type checking simultaneously without manual type duplication.

JIT-compiled validators deliver 10x-100x performance gains for large dataset validation. Applying just-in-time compilation to schema checks ensures high-performance runtime validation suitable for demanding production environments processing heavy data payloads.

Morphs enable in-line data transformation during TypeScript runtime validation. You can apply data morphs to parse and alter incoming form or API payloads directly within the validation schema, resulting in cleanly structured output objects.

ArkType supports Standard Schema compatibility for seamless integration with modern tooling. This ensures your runtime validators work smoothly alongside contemporary TypeScript frameworks and libraries that adopt the Standard Schema specification.

You can validate complex recursive domain models using scopes and recursion support. This allows you to define self-referencing schemas that accurately validate nested data structures without hitting compilation limits or type inference errors.