node-blake2 is a Node.js library providing all four BLAKE2 cryptographic hash variants (blake2b, blake2bp, blake2s, blake2sp) with stream support, designed for developers who need fast, secure hashing. It offers both unkeyed and keyed hashing capabilities, with compatibility matching Node.js's built-in crypto module. The library is particularly useful for applications requiring high-performance hashing, such as data integrity verification, digital signatures, or secure password storage, while maintaining cross-platform compatibility across major operating systems and architectures.