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 aicontinue="Chess_Qd44.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Certificato1.png" timestamp="2012-06-10T21:51:14Z" url="https://uz.sns.it/wiki/images/1/14/Certificato1.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Certificato1.png" ns="6" title="File:Certificato1.png" />
      <img name="Certificato2.png" timestamp="2012-06-10T21:52:28Z" url="https://uz.sns.it/wiki/images/0/0b/Certificato2.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Certificato2.png" ns="6" title="File:Certificato2.png" />
      <img name="Chess_Bd44.png" timestamp="2018-09-26T12:53:50Z" url="https://uz.sns.it/wiki/images/3/39/Chess_Bd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Bd44.png" ns="6" title="File:Chess Bd44.png" />
      <img name="Chess_Bl44.png" timestamp="2018-09-26T12:53:51Z" url="https://uz.sns.it/wiki/images/5/53/Chess_Bl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Bl44.png" ns="6" title="File:Chess Bl44.png" />
      <img name="Chess_Kd44.png" timestamp="2018-09-26T12:53:51Z" url="https://uz.sns.it/wiki/images/c/c1/Chess_Kd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Kd44.png" ns="6" title="File:Chess Kd44.png" />
      <img name="Chess_Kl44.png" timestamp="2018-09-26T12:53:52Z" url="https://uz.sns.it/wiki/images/5/5c/Chess_Kl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Kl44.png" ns="6" title="File:Chess Kl44.png" />
      <img name="Chess_Nd44.png" timestamp="2018-09-26T12:53:52Z" url="https://uz.sns.it/wiki/images/f/ff/Chess_Nd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Nd44.png" ns="6" title="File:Chess Nd44.png" />
      <img name="Chess_Nl44.png" timestamp="2018-09-26T12:53:53Z" url="https://uz.sns.it/wiki/images/2/20/Chess_Nl44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Nl44.png" ns="6" title="File:Chess Nl44.png" />
      <img name="Chess_Pd44.png" timestamp="2018-09-26T12:53:53Z" url="https://uz.sns.it/wiki/images/c/c7/Chess_Pd44.png" descriptionurl="https://uz.sns.it/wiki/index.php/File:Chess_Pd44.png" ns="6" title="File:Chess Pd44.png" />
      <img name="Chess_Pl44.png" timestamp="2018-09-26T12:53:54Z" url="https://uz.sns.it/wiki/images/f/f6/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>