Flutter-encode-decode-base64.dart

import 'dart:convert' show utf8, base64;

main() {
  final str = 'https://dartpad.dartlang.org/';

  final encoded = base64.encode(UTF8.encode(str));
  print('base64: $encoded');

  final str2 = utf8.decode(base64.decode(encoded));
  print(str2);
  print(str == str2);
}