id62: Base-62 Random UUIDs for Node.js

A small, fast base-62 universally unique identifier (UUID) generator for Node.js written in Typescript.

Goals/Benefits

• Alphanumeric base-62 (0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz)
  • Relatively compact (21 digits compared to 36 of hexadecimal OSF DCE UUID)
  • URL path and filename compatible (no slash like some base-64 alphabets)
  • Easy double-click selection for copy/paste (most apps only select alphanumeric characters)
• Exact same number of random bits (122) as OSF DCE UUID v4
  • Same negligible collision probability ("the probability to find a duplicate within 103 trillion version-4 UUIDs is one in a billion")
  • Could be translated to a hexadecimal UUID v4 for interoperability if necessary
• Fixed-length representation (leading zeroes not dropped)
• Cryptographically secure randomization (from Node's crypto.randomBytes)
• Avoid unnecessary steps, such as converting a UUID v4 string to base-62
• No dependencies

Installation

npm install id62

Usage

import id62 from 'id62';

console.log(id62()); // 0KwQZuxQNLAxV7a7mFm16

License

id62 is available under the ISC license.