In this tutorials, I am going to show you how to format JSON output using Jackson’s PrettyPrinter.

Format JSON Output PrettyPrinter :

We can format the JSON string with a readable format. In the previous tutorials, when we convert java Employee object to JSON, or convert Java Map to JSON string in both cases we got the JSON output in a single line like below:


If we want to format the above output like below:

"studentId" : "1001",
"studentName" : "Rahul",
"roleNumber" : "54",
"standard" : "5th"


We can format the JSON output using writerWithDefaultPrettyPrinter() method available in ObjectMapper class.

Format JSON Output Example :


package com.onlinetutorialspoint.json;

import java.util.HashMap;
import java.util.Map;


public class Formate_JSON_Output {
    public static void main(String[] args) {
        Map<String,String> scoreMap = new HashMap<String,String>();
        scoreMap.put("Dhoni", "102");
        scoreMap.put("Yuvraj", "94");
        scoreMap.put("Raina", "82");
        scoreMap.put("Kohli", "120");
        ObjectMapper mapperObj = new ObjectMapper();
        try {
            String jsonFormat = mapperObj.writerWithDefaultPrettyPrinter().writeValueAsString(scoreMap);
        } catch (Exception e) {



"Kohli" : "120",
"Yuvraj" : "94",
"Dhoni" : "102",
"Raina" : "82"

Happy Learning 🙂

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