Online Base64 Encoder

I have this String that is encoded into Base64 String:

{  "appId": "70cce8adb93c4c968a7b1483f2edf5c1",  "apiKey": "a65d8f147fa741b0a6d7fc43e18363c9",  "entityType": "Todo",  "entityId": "2-0",  "blobName": "picture"}

The output is:

ewogICJhcHBJZCI6ICI3MGNjZThhZGI5M2M0Yzk2OGE3YjE0ODNmMmVkZjVjMSIsCiAgImFwaUtleSI6ICJhNjVkOGYxNDdmYTc0MWIwYTZkN2ZjNDNlMTgzNjNjOSIsCiAgImVudGl0eVR5cGUiOiAiVG9kbyIsCiAgImVudGl0eUlkIjogIjItMCIsCiAgImJsb2JOYW1lIjogInBpY3R1cmUiCn0=

In my case this is quite long. I can't use one way hashing in my case because it needs to be decoded on the other end.

Is there an encoding that is at least just ~1/4 the size compared to Base64 encoding?

PHP's base64_encode is returning a different string to the linux base64 command.Why is this?

PHP:

$ php<?phpecho base64_encode('test');?>dGVzdA==

Linux base64:

$ echo 'test' | base64dGVzdAo=

I am trying to base64 decode a byte array and everything is running fine as long as my byte array does not contain any characters like '-'or '_'. But whenever the byte array contains '-' I get an exception as

java.lang.IllegalArgumentException: Illegal base64 character 2d    at java.util.Base64$Decoder.decode0(Base64.java:714)    at java.util.Base64$Decoder.decode(Base64.java:526)

and when the byte array contains'_', the exception is

java.lang.IllegalArgumentException: Illegal base64 character 5f    at java.util.Base64$Decoder.decode0(Base64.java:714)    at java.util.Base64$Decoder.decode(Base64.java:526)

i.e. a difference of code after character 2d to 5f.What are these codes. And how can i decode any value irrespective of these characters in my code?

Here is my code snippet:

import java.util.Properties;import java.util.Base64;import java.io.*;...public class BasicSample {    public static void main(String[] args) {      byte[] encoded = res.getBytes("s_id");      System.out.printf("\nInside Byte %s\n",new String(encoded) );      try {        byte[] decoded = Base64.getDecoder().decode(encoded);        System.out.printf("\nDecoded Byte %s\n",new String(decoded, "UTF-8") );      } catch(Exception e) {        e.printStackTrace();      }   }}

I am trying to convert website icon (https://www.example.com/icon.ico) to base64.

I have tried base64_encode(file_get_contents('https://www.example.com/icon.ico'));but noting happened!

How to convert .ico icon to base64 in PHP?Please Help me

In. c#

We can use below classes to do encoding:

• System.Text.Encoding.UTF8
• System.Text.Encoding.UTF16
• System.Text.Encoding.ASCII

Why there is no System.Text.Encoding.Base64?

We can only use Convert.From(To)Base64String method, what's special of base64?

Can I say base64 is the same encoding method as UTF-8? Or UTF-8 is one of base64?