SannrAOT-First Validation Engine for .NET

Blazingly fast validation -- up to 20x faster than DataAnnotations with 95% less memory.

Native AOT First

Roslyn source generators move validation from runtime reflection to compile-time static C#. Zero startup overhead, 100% trimming safe.

Use attributes you already know -- [Required], [Range], [EmailAddress]. Drop-in replacement for DataAnnotations.

Native async support for database lookups and [RequiredIf] conditional logic, all generated at compile time.

Built-in [Sanitize] attribute trims, uppercases, and lowercases input before validation -- no manual controller code.

Zero-allocation property access, PII tagging, and deep cloning without System.Reflection. AOT-compatible metadata at compile time.

Seamless ASP.NET Core, OpenAPI schema generation, client-side validation rules, and observability metrics out of the box.