Char to byte

Hi!!! I am testing a code for a project with ArduinoJson and i need to save the Json char in EEPROM, but isn't possible to save in char and that i know. How to i convert the json array to byte??? I am a little rusty right now xD

#include <EEPROM.h>
#include <ArduinoJson.h>

int temp;
int humidity;

char json[80]; 

void setup() {
  Serial.begin(9600);

}

void loop() {
  if (Serial.read() == 'j'){ //JSON WRITE
    DynamicJsonBuffer jBuffer;
    JsonObject& root = jBuffer.createObject();

    temp=25;
    humidity=40;

    root["day"] = "Monday";
    root["temperature"] = temp;
    root["humidity"] = humidity;

    root.prettyPrintTo(json);

    //I NEED TO WRITE WERE JSON TO EEPROM

    Serial.println("EEPROM SAVED");
  }

  if (Serial.read() == 'a'){ // JSONPARSE

    
    DynamicJsonBuffer jsonBuffer;
    JsonObject& root = jsonBuffer.parseObject(json);

   const char* days = root["day"];
  int temp = root["temperature"];
  int humidity = root["humidity"];

  // Print values.
  Serial.println(days);
  Serial.println(temp);
  Serial.println(humidity);
    
    
  }
}

but isn't possible to save in char

Sure it is. A char is an 8 bit type. A bytes is an 8 bit type.

but isn't possible to save in char and that i know.

So, this is presumably impossible

#include <EEPROM.h>

char putText[12] = {"Hello World"};
char getText[12];

void setup()
{
  Serial.begin(115200);
  EEPROM.put(0, putText);
  EEPROM.get(0, getText);
  Serial.println(getText);
}

void loop()
{
}