**buffer‑xor** is a tiny Node.js library that provides a fast, bitwise XOR operation for Buffer objects. It exports a pure function that returns a new buffer with the XOR‑ed result, and an optional in‑place variant for performance‑critical code. The module is aimed at developers building cryptographic or low‑level binary utilities who need a simple, reliable way to XOR buffers in both browser‑ified and server environments.