As simple application to base64 encode and base64 decode string
Note - The order of flags matters.
b64 -e <inputString>
b64 -d <inputEncodedString>
b64 -f -e <inputFileName> <outputFileName>
b64 -f -d <inputFileName> <outputFileName>
Download mac-intel-64 executable
go get github.com/dinumathai/b64