ascii :base64-encode ( string $MESSAGE )
ascii :encodeBase64 ( string $MESSAGE )

Encodes the given string into MIME Base64 representation.

# :base64-encode example.
:set &enc s'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZy4='
:set &str :base64-encode s'This is an encoded string.'

!if :eq $enc $str
    :writeln s"awful's Base64-encode seems to work fine."
!else
    :writeln s"Uh-oh, it seems awful's Base64-encode is broken."
!fi