Nano ID
By default, Nano ID uses URL-friendly symbols (A-Za-z0-9_-) and returns an ID with 21 characters (to have a collision probability similar to UUID v4).
Features of Nano ID
Small.
130 bytes (minified and gzipped). No dependencies. Size Limit controls the size.
Fast.
It is 2 times faster than UUID.
Safe.
It uses hardware random generator. Can be used in clusters.
Short IDs.
It uses a larger alphabet than UUID (A-Za-z0-9_-). So ID size was reduced from 36 to 21 symbols.
Portable.
Nano ID was ported to 20 programming languages.