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>
    <pageswithprop gpwpcontinue="14702" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4039" ns="0" title="Lonelygirl15 behind the scenes" contentmodel="wikitext" pagelanguage="en" touched="2016-07-02T19:52:11Z" lastrevid="171793" counter="71781" length="4373" />
      <page pageid="4432" ns="0" title="The Ends Justify The Means" contentmodel="wikitext" pagelanguage="en" touched="2016-07-24T06:02:46Z" lastrevid="172166" counter="19771" length="4453" />
      <page pageid="4652" ns="0" title="Lose Something?" contentmodel="wikitext" pagelanguage="en" touched="2016-07-24T06:07:28Z" lastrevid="172167" counter="28603" length="3041" />
      <page pageid="5486" ns="0" title="Facility J" contentmodel="wikitext" pagelanguage="en" touched="2016-06-29T22:26:56Z" lastrevid="163786" counter="77248" length="9365" />
      <page pageid="5647" ns="0" title="Alex" contentmodel="wikitext" pagelanguage="en" touched="2016-07-24T04:10:19Z" lastrevid="169788" counter="103630" length="6176" />
      <page pageid="6189" ns="0" title="Main Page" contentmodel="wikitext" pagelanguage="en" touched="2016-07-07T02:06:55Z" lastrevid="171968" counter="2458603" length="4984" />
      <page pageid="6875" ns="0" title="Maddison Avenue" contentmodel="wikitext" pagelanguage="en" touched="2016-08-09T19:47:35Z" lastrevid="172499" counter="81467" length="14267" />
      <page pageid="8938" ns="0" title="Portal:lonelygirl15" contentmodel="wikitext" pagelanguage="en" touched="2016-06-23T14:46:35Z" lastrevid="170979" counter="901063" length="1424" />
      <page pageid="8939" ns="0" title="Portal:KateModern" contentmodel="wikitext" pagelanguage="en" touched="2016-07-24T14:05:14Z" lastrevid="168928" counter="457910" length="1407" />
      <page pageid="13286" ns="0" title="List of KateModern videos/Season 1" contentmodel="wikitext" pagelanguage="en" touched="2016-07-24T02:20:26Z" lastrevid="172112" counter="31076" length="17020" />
    </pages>
  </query>
</api>