How to decode base64

Question

I have a problem where json is encoded as base64 and I have to read that base64 and decode it and use the values of json.

My Json Structure:

{
  "name" : "myname",
  "id" : "1234568",
  "class" : "science"
}

My Base64:

ewogICJuYW1lIiA6ICJteW5hbWUiLAogICJpZCIgOiAiMTIzNDU2OCIsCiAgImNsYXNzIiA6ICJzY2llbmNlIgp9

How can I decode this and get the values of the class?

There are plenty of libraries that will do this. What programming language are you using? Also, make sure to know if this is base64 url encoded or not. — Swan Toma, Dec 23 '20 at 04:36
Maybe an example like this helps: https://www.tutorialspoint.com/java8/java8_base64.htm — Swan Toma, Dec 23 '20 at 04:40
*I'm curious:* In what way did a **web search** for [`java decode base64`](https://www.google.com/search?q=java+decode+base64) fail to give you an answer? --- Question down-voted because it "does not show any research effort". — Andreas, Dec 23 '20 at 05:31

score 1 · Answer 1 · answered Dec 23 '20 at 04:51

If you still need help, you can try this:

import java.util.Base64;

public class Tmp {

    public static void main(String [] args){
        byte[] base64decodedBytes = Base64.getDecoder().decode("ewogICJuYW1lIiA6ICJteW5hbWUiLAogICJpZCIgOiAiMTIzNDU2OCIsCiAgImNsYXNzIiA6ICJzY2llbmNlIgp9");
        String original = new String(base64decodedBytes);
        System.out.println("Original String: " + original);
    }
}

How to decode base64

1 Answers1