Can base64 encoding applied to multibyte utf-8 characters?

Question

Can base64 encoding applied to multibyte utf-8 characters ? How base64 encoded string is converted back to multibyte utf-8 string ?

Answer 1

base64 is applied to bytes, not characters. It's up to your application to convert your strings, utf8 or not, to their bytes representation.

Answer 2

base64 does not care. You can use base64 encode and then decode to get back where you were.