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>
    <allimages aistart="2018-09-26T12:54:01Z" />
  </query-continue>
  <query>
    <allimages>
      <img name="Luminara2015.jpg" timestamp="2019-04-20T22:13:36Z" user="Ilcusu" url="https://uz.sns.it/wiki/images/c/c8/Luminara2015.jpg" descriptionurl="https://uz.sns.it/wiki/index.php/File:Luminara2015.jpg" ns="6" title="File:Luminara2015.jpg" />
      <img name="Copertina_CD_2018.png" timestamp="2018-11-10T13:48:57Z" user="Flavio a" url="https://uz.sns.it/wiki/images/9/98/Copertina_CD_2018.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Copertina_CD_2018.png" ns="6" title="File:Copertina CD 2018.png" />
      <img name="Chess_xd44.png" timestamp="2018-09-26T12:54:05Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/6/67/Chess_xd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_xd44.png" ns="6" title="File:Chess xd44.png" />
      <img name="Chess_od44.png" timestamp="2018-09-26T12:54:05Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/9/98/Chess_od44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_od44.png" ns="6" title="File:Chess od44.png" />
      <img name="Chess_zver_26.png" timestamp="2018-09-26T12:54:04Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/d/dd/Chess_zver_26.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_zver_26.png" ns="6" title="File:Chess zver 26.png" />
      <img name="Chess_zhor_26.png" timestamp="2018-09-26T12:54:04Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/4/4a/Chess_zhor_26.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_zhor_26.png" ns="6" title="File:Chess zhor 26.png" />
      <img name="Chess_xl44.png" timestamp="2018-09-26T12:54:03Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/d/d1/Chess_xl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_xl44.png" ns="6" title="File:Chess xl44.png" />
      <img name="Chess_rl44.png" timestamp="2018-09-26T12:54:03Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/d/dd/Chess_rl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_rl44.png" ns="6" title="File:Chess rl44.png" />
      <img name="Chess_rd44.png" timestamp="2018-09-26T12:54:02Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/a/a4/Chess_rd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_rd44.png" ns="6" title="File:Chess rd44.png" />
      <img name="Chess_pl44.png" timestamp="2018-09-26T12:54:02Z" user="Maintenance script" anon="" url="https://uz.sns.it/wiki/images/e/ea/Chess_pl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_pl44.png" ns="6" title="File:Chess pl44.png" />
    </allimages>
  </query>
</api>