The Base64 package contains support for doing Base64 binary-to-text encodings. We currently have support 3 encodings: PEM, MIME and URL.
To learn more about Base64, we suggest you check out the wikipedia entry.
use "encode/base64" actor Main new create(env: Env) => env.out.print(Base64.encode("foobar")) try env.out.print(Base64.decode[String ]("Zm9vYmFy")?) end