Hashids is a small, open-source library that generates short, unique, non-sequential IDs from numbers. It's ideal for obfuscating database IDs in URLs or creating human-friendly identifiers. Unlike traditional hashing, Hashids is reversible, allowing you to decode the original number from the ID. Supports customizable salt strings, minimum ID length, and alphabet for generating secure and aesthetically pleasing identifiers across various languages. Use it to enhance privacy and usability in your applications.