生成短URL友好的唯一ID
NanoID is a compact, URL-friendly unique string ID generator. By default it generates 21-character IDs using a 64-character alphabet (A-Za-z0-9_-), providing 126 bits of entropy.
NanoID is shorter (21 vs 36 characters), URL-safe without encoding, and has a customizable alphabet and length. UUID is more widely standardized.
Yes, you can set any length from 1 to 64 characters. Shorter IDs have less uniqueness but are fine for low-collision use cases.