Awesome
base64 (C++)
Base64 encoding and decoding with c++
See also
https://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp
Base64 encoding and decoding with c++
https://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp