Files with the .JSP extension contain source code written in text form, which is used by the server to generate an HMTL webpage. It is similar to PHP and ASP, but it uses Java code instead of PHP or ActiveX code. The JSP file code is analyzed by the WWW server, which then generates a webpage and sends it to the user’s web browser – this way, the user does not see the JSP generating code itself – only the HTML resulting code. JSP files are created and edited using webpage creation software, and sometimes also using just a simple text editor.