w3shcools download button code example

Example 1: html link to download file

<a href="the/name/of/your/file.x" download>

Example 2: how to add stylish download buttom

<div style="text-align: center;">
  <ul class="button2">
    <li><a class="demo" href="http://askwithloud.blogspot.com" target="_blank">Demo Link</a></li>
    <li><a class="download" href="http://askwithloud.blogspot.com" target="_blank">Download Link</a></li>
  </ul>
</div>
<div class="clear"></div>