title: Conversion of Base64 Encoded into XSLX
body: <p>I was looking into my Mail Server in Text version; There is saw an attachment of filename= xyz.xslx &amp; <code>Content-Transfer-Encoding: base-64</code> and after that there was stream of Base64 encoded Code. Initially the content-type was <code>Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;</code></p>
  
  <p>Now, Is it possible to convert the base-64 encoded string code to retrieve the xslx document? I tried using several online sites like <code>base64decode.org</code> but as the initial file type was xslx, it didn't gave any output in Plain-Text too. So how do i work out with issue ?</p>