JsonConverter

  using UnityEngine;

using System.IO;

using Newtonsoft.Json;

using System.Collections.Generic;

public class JsonConverter : MonoBehaviour

{

    [SerializeField] private string oldJsonFilePath = "path/to/old_json_file.json";

    [SerializeField] private string newJsonFilePath = "path/to/new_json_file.json";

    void Start()

    {

        ConvertJsonFormat();

    }

    void ConvertJsonFormat()

    {

        // Read the old JSON file

        string oldJsonData = File.ReadAllText(oldJsonFilePath);

        var oldJsonDict = JsonConvert.DeserializeObject<OldJsonFormat>(oldJsonData);

        // Convert to new format and write directly to the file

        using (StreamWriter writer = new StreamWriter(newJsonFilePath))

        {

            foreach (var user in oldJsonDict.users)

            {

                NewJsonFormat newUser = new NewJsonFormat

                {

                    id = user.Key,

                    email = user.Value.email,

                    language = user.Value.language,

                    parentFirstName = user.Value.parentFirstName,

                    parentLastName = user.Value.parentLastName,

                    noOfChildren = user.Value.noOfChildren,

                    HiddenfieldStatic = user.Value.HiddenfieldStatic,

                    childrenAge = user.Value.childrenAge,

                    country = user.Value.country

                };

                // Convert new object to JSON string and write it to the file in a single line

                string newJson = JsonConvert.SerializeObject(newUser);

                writer.WriteLine(newJson);

            }

        }

        Debug.Log("JSON data converted and overwritten in the new format.");

    }

    // Old JSON format classes

    [System.Serializable]

    private class OldUser

    {

        public string email;

        public string language;

        public string parentFirstName;

        public string parentLastName;

        public string noOfChildren;

        public string HiddenfieldStatic;

        public string childrenAge;

        public string country;

    }

    [System.Serializable]

    private class OldJsonFormat

    {

        public Dictionary<string, OldUser> users;

    }

    // New JSON format class

    [System.Serializable]

    private class NewJsonFormat

    {

        public string id;

        public string email;

        public string language;

        public string parentFirstName;

        public string parentLastName;

        public string noOfChildren;

        public string HiddenfieldStatic;

        public string childrenAge;

        public string country;

    }

}