Prettier-bytes is a lightweight npm package that augments the pretty-bytes library to make byte size outputs more readable and slightly less precise. It's designed for developers who need to display file sizes in a user-friendly format, rounding to one decimal place for smaller numbers and removing decimals for larger ones, while also changing the unit notation from `kB` to `KB` for improved readability. The package has no dependencies and is easy to integrate into Node.js projects.