Get Base58.js and add it to your web page with a script tag:

<script src="Base58.js" charset="utf-8"></script>

window.Base58 is defined when the script is executed. There are two methods:

Base58.encode(a Uint8Array) returns a String
Base58.decode(a String) returns a Uint8Array

Run npm install base-58 to add the module to your package. Require it in your program with Base58 = require("base-58"). Again, there are two methods:

Base58.encode(a Buffer or Uint8Array) returns a String
Base58.decode(a String) returns a Buffer

• Mike Hearn for original Java implementation.
• Stefan Thomas for porting to JavaScript.
• Stephan Pair for buffer improvements.
• Daniel Cousens for cleanup and merging improvements from bitcoinjs-lib.
• Jared Deckard for killing bigi as a dependency.
• cryptocoinjs for the original package.
• Js2coffee for conversion to CoffeeScript.