FasterSchema

FasterSchema is an isomorphic JavaScript object schema validation library (v2.1.0) designed as a faster alternative to SimpleSchema with a similar API. It validates objects, cleans data (type conversion, property removal, automatic values), and provides a customizable error message system with localization support. Compared to SimpleSchema, it is approximately 20x faster for validation and 50x faster for cleaning complex objects, but does not support MongoDB modifier validation. Active development, frequent releases, hundreds of tests.