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>
    <allimages>
      <img name="Cimitero_Bibbona.jpg" timestamp="2023-09-16T09:42:26Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/4/41/Cimitero_Bibbona.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:Cimitero_Bibbona.jpg" ns="6" title="File:Cimitero Bibbona.jpg" />
      <img name="IMG_20230813_124607.png" timestamp="2023-09-16T09:41:23Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/f/f8/IMG_20230813_124607.png" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:IMG_20230813_124607.png" ns="6" title="File:IMG 20230813 124607.png" />
      <img name="IMG_20230813_124607.jpg" timestamp="2023-09-16T09:39:13Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/4/4f/IMG_20230813_124607.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:IMG_20230813_124607.jpg" ns="6" title="File:IMG 20230813 124607.jpg" />
      <img name="2023-09-09_at_18.57.38.jpeg" timestamp="2023-09-15T18:18:16Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/4/4d/2023-09-09_at_18.57.38.jpeg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:2023-09-09_at_18.57.38.jpeg" ns="6" title="File:2023-09-09 at 18.57.38.jpeg" />
      <img name="NAVE_ROMA-deflagrazione.jpg" timestamp="2023-09-15T18:17:38Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/c/c5/NAVE_ROMA-deflagrazione.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:NAVE_ROMA-deflagrazione.jpg" ns="6" title="File:NAVE ROMA-deflagrazione.jpg" />
      <img name="MA23-L&#039;affondamento_della_Corazzata_Roma_-2023-.pdf" timestamp="2023-09-15T18:17:24Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/5/5c/MA23-L%27affondamento_della_Corazzata_Roma_-2023-.pdf" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:MA23-L%27affondamento_della_Corazzata_Roma_-2023-.pdf" ns="6" title="File:MA23-L&#039;affondamento della Corazzata Roma -2023-.pdf" />
      <img name="GIOVANNI_PECCIANTI-C.jpg" timestamp="2023-09-15T18:17:01Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/7/70/GIOVANNI_PECCIANTI-C.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:GIOVANNI_PECCIANTI-C.jpg" ns="6" title="File:GIOVANNI PECCIANTI-C.jpg" />
      <img name="GIOVANNI_PECCIANTI-B.jpg" timestamp="2023-09-15T18:16:49Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/8/88/GIOVANNI_PECCIANTI-B.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:GIOVANNI_PECCIANTI-B.jpg" ns="6" title="File:GIOVANNI PECCIANTI-B.jpg" />
      <img name="GIOVANNI_PECCIANTI-A.jpg" timestamp="2023-09-15T18:16:32Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/5/54/GIOVANNI_PECCIANTI-A.jpg" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:GIOVANNI_PECCIANTI-A.jpg" ns="6" title="File:GIOVANNI PECCIANTI-A.jpg" />
      <img name="Discorso.pdf" timestamp="2023-09-15T18:16:09Z" user="Marco Andrenacci" url="https://www.lacaliforniaitaliana.it/images/8/85/Discorso.pdf" descriptionurl="https://www.lacaliforniaitaliana.it/index.php?title=File:Discorso.pdf" ns="6" title="File:Discorso.pdf" />
    </allimages>
  </query>
  <query-continue>
    <allimages aistart="2023-09-15T18:15:53Z" />
  </query-continue>
</api>