You can use pre tag to display formatted json.

const json = {
  id: "1",
  employee_name: "Tiger Nixon",
  employee_salary: "320800",
  employee_age: "61",
  profile_image: ""
};
document.getElementById("app").innerHTML = JSON.stringify(json, (key, value) => (value || ''), 4).replace(/"([^"]+)":/g, '$1:');

	<div><pre id="app"></pre></div>

Json is a format which looks like plain text. I guess you know what you are asking. If you need to convert a file containing Json text to a readable format, you need to convert that to an Object and implement toString() method(assuming converting to Java object) to print or write to another file in a much readabe format. You can use any Json API for this, for example Jackson JSON API.

ObjectMapper obj = new ObjectMapper();
T t=obj.readValue(File src, Class<T> valueType) 

t.toString();  //this must have been implemented

Iterate over the errors and append them to an element.

$("#errors").empty();
$.each(responseJSON.errors, function(key, value) {
    $("#errors").append("<div>" + key + " " + value + "</div>");
});