How to write a code of Encode and Decode json data in Dart language

 Encode and decode JSON data in dart language

import 'dart:convert';

void main() {

  // Original data as a Dart map

  Map<String, dynamic> originalData = {

    'field1': 'value1',

    'field2': 42,

    'field3': true,

  };

  // Encode the Dart map to JSON string

  String jsonString = jsonEncode(originalData);

  print('Original JSON String:');

  print(jsonString);

  // Encode the JSON string to base64

  String base64EncodedString = base64.encode(utf8.encode(jsonString));

  print('\nBase64 Encoded String:');

  print(base64EncodedString);

  // Decode the base64 string to JSON string

  String decodedJsonString = utf8.decode(base64.decode(base64EncodedString));

  print('\nDecoded JSON String:');

  print(decodedJsonString);

  // Decode the JSON string to a Dart map

  Map<String, dynamic> decodedData = jsonDecode(decodedJsonString);

  print('\nDecoded Dart Map:');

  print(decodedData);

}

************************* Output *******************************

Original JSON String:

{"field1":"value1","field2":42,"field3":true}

Base64 Encoded String:

eyJmaWVsZDEiOiJ2YWx1ZTEiLCJmaWVsZDIiOjQyLCJmaWVsZDMiOnRydWV9

Decoded JSON String:

{"field1":"value1","field2":42,"field3":true}

Decoded Dart Map:

{field1: value1, field2: 42, field3: true}

Thanks