UUID v1: Time-based with MAC address, predictable but unique
UUID v4: Random-based, most commonly used UUID format
UUID v5: Name-based using SHA-1, deterministic from input
NanoID: URL-safe, smaller than UUID, customizable
Custom NanoID: NanoID with your own character set
Short ID: 8-character random identifier
Numeric ID: Numbers-only identifier
Hex ID: Hexadecimal-based identifier