node-base64-js 1.5.1+dfsg+~1.3.0-2 (amd64 binary) in ubuntu lunar

 Converts a byte array into base64 string and vice versa.
 .
 Base64 is binary-to-text encoding schemes that represent binary data
 in an ASCII string format by translating it into a radix-64 representation.
 (6 bits).
 .
 Node.js is an event-based server-side JavaScript engine.