How can you encode a string to Base64 in JavaScript?

Question

I have a PHP script that can encode a PNG image to a Base64 string.

I\'d like to do the same thing using JavaScript. I know how to open files, but I\'m not sure how

Answer 1

Here is a LIVE DEMO of atob() and btoa() JS built in functions:

  
    
    
  
  
    

      Some text to decode
      
    
    

      
    
    

            
    
    

    

      U29tZSB0ZXh0IHRvIGRlY29kZQ==