You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Clean-Chrome-Shortcut-From-Startpages.png|45" />
  </query-continue>
  <query>
    <pages>
      <page pageid="386" ns="0" title="Chromebook: Taking Screenshot" />
      <page pageid="653" ns="0" title="Windows: how to reduce Hibernation File hiberfil.sys" />
      <page pageid="1148" ns="0" title="WhatsApp Change Chat Background Image on Windows Phone" />
      <page pageid="1150" ns="0" title="WhatsApp Change Text Size on Windows Phone" />
      <page pageid="1425" ns="0" title="Change or Delete iPhone Signature: Sent from my iPhone" />
      <page pageid="1820" ns="0" title="Windows 10: ALT Key Codes ☺☢☭❤❀" />
      <page pageid="2237" ns="0" title="BlackBerry Leap: Taking a Screenshot" />
    </pages>
  </query>
</api>