base-decoder

What is Base encoding?

BaseDecoder encoding converts numbers to ASCII strings (0-9, a-z and A-Z) and vice versa, which typically results in comparatively short strings. Such identifiers also tend to more readily identifiable by humans.

• 1563211298668 => "rwjxiKo"
• 98668 => "pFq"

Installation

npm i base-decoder

alternatively using Yarn:

yarn add base-decoder

Usage

let BaseDecoder = require('base-decoder');
let decoder = new BaseDecoder; // default base62 [0-1a-zA-Z]

decoder.encode(1563211298668);  // "rwjxiKo"
decoder.decode("rwjxiKo"); // 1563211298668

This uses the default ASCII character set for encoding/decoding.

It's also possible to define a custom character set instead:

let BaseDecoder = require('base-decoder');
let decoder = new BaseDecoder('0123456789abcdef'); // base-16

decoder.encode(1563211298668);  // "0123456789abcdef"
decoder.decode("0123456789abcdef"); // 1563211298668

You can shift the value to reduce the string representation:

let BaseDecoder = require('base-decoder');
let shiftValue = -1563211200000;
let decoder = new BaseDecoder(null, shiftValue); // base62 + shift

decoder.encode(1563211298668);  // "pFq"
decoder.decode("pFq"); // 1563211298668

Decoder supports negative number:

let BaseDecoder = require('base-decoder');
let decoder = new BaseDecoder;

decoder.encode(-1000);  // "g8-"
decoder.decode("g8-"); // -1000