How to read a JSON data from a web service in Unity. This Tutorial is about reading JSON data. We will build a little application build on a JSON webservice.

✅ Download the free SimpleJSON parser:
https://github.com/HenrikPoulsen/SimpleJSON

✅ The free geoplugin webservice:
http://www.geoplugin.net/json.gp?ip=213.22.22.98

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The LoadJSON script:

/*

   .-------.                             .--.    .-------.     .--.            .--.     .--.        
   |       |--.--.--------.-----.-----.--|  |    |_     _|--.--|  |_.-----.----|__|---.-|  |-----.
   |   -   |_   _|        |  _  |     |  _  |      |   | |  |  |   _|  _  |   _|  |  _  |  |__ --|
   |_______|__.__|__|__|__|_____|__|__|_____|      |___| |_____|____|_____|__| |__|___._|__|_____|
   © 2019 OXMOND / www.oxmond.com 

*/

using System.Collections;
using UnityEngine;
using SimpleJSON;
using UnityEngine.Networking;
using TMPro;

public class LoadJSON : MonoBehaviour
{

    public TMP_InputField inputTxt;
    public TMP_Text countryTxt;
    public TMP_Text continentTxt;

    public void GetJsonData()
    {
        StartCoroutine(RequestWebService());
    }

    IEnumerator RequestWebService()
    {
        string getDataUrl = "http://www.geoplugin.net/json.gp?ip=" + inputTxt.text;
        print(getDataUrl);

        using (UnityWebRequest webData = UnityWebRequest.Get(getDataUrl))
        {

            yield return webData.SendWebRequest();
            if (webData.isNetworkError || webData.isHttpError)
            {
                print("---------------- ERROR ----------------");
                print(webData.error);
            }
            else
            {
                if (webData.isDone)
                {
                    JSONNode jsonData = JSON.Parse(System.Text.Encoding.UTF8.GetString(webData.downloadHandler.data));

                    if (jsonData == null)
                    {
                        print("---------------- NO DATA ----------------");
                    }
                    else
                    {
                        print("---------------- JSON DATA ----------------");
                        print("jsonData.Count:" + jsonData.Count);
                        countryTxt.text = jsonData["geoplugin_countryName"];
                        continentTxt.text = jsonData["geoplugin_continentName"];
                    }
                }
            }
        }
    }
}