Dart MD5 From String

A more efficient approach would be the following:

import 'dart:convert';
import 'package:crypto/crypto.dart';

String generateMd5(String input) {
  return md5.convert(utf8.encode(input)).toString();
}

This avoids loading the unnecessary convert package and uses the already existing Utf8Codec, instead of instantiating a Utf8Encoder object each time the function is called.