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="2024-01-28T15:11:26Z" />
  </query-continue>
  <query>
    <allimages>
      <img name="APLICADOR-MORTERO-ALTA-POTENCIA-TUBO-CERRADO-600-ML-ALYCO-198818PRINCIPAL.jpg" timestamp="2024-01-30T17:21:40Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/5/50/APLICADOR-MORTERO-ALTA-POTENCIA-TUBO-CERRADO-600-ML-ALYCO-198818PRINCIPAL.jpg" descriptionurl="https://wiki.fablabbcn.org/File:APLICADOR-MORTERO-ALTA-POTENCIA-TUBO-CERRADO-600-ML-ALYCO-198818PRINCIPAL.jpg" ns="6" title="File:APLICADOR-MORTERO-ALTA-POTENCIA-TUBO-CERRADO-600-ML-ALYCO-198818PRINCIPAL.jpg" />
      <img name="Running_a_file_from_usb.jpg" timestamp="2024-01-30T17:10:42Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/e/e3/Running_a_file_from_usb.jpg" descriptionurl="https://wiki.fablabbcn.org/File:Running_a_file_from_usb.jpg" ns="6" title="File:Running a file from usb.jpg" />
      <img name="Exportfile.png" timestamp="2024-01-30T17:07:18Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/d/da/Exportfile.png" descriptionurl="https://wiki.fablabbcn.org/File:Exportfile.png" ns="6" title="File:Exportfile.png" />
      <img name="Tcp_data1-01.png" timestamp="2024-01-30T17:01:49Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/8/83/Tcp_data1-01.png" descriptionurl="https://wiki.fablabbcn.org/File:Tcp_data1-01.png" ns="6" title="File:Tcp data1-01.png" />
      <img name="Bas_calbr_23.jpg" timestamp="2024-01-28T17:20:32Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/9/94/Bas_calbr_23.jpg" descriptionurl="https://wiki.fablabbcn.org/File:Bas_calbr_23.jpg" ns="6" title="File:Bas calbr 23.jpg" />
      <img name="Extrusion_test.jpg" timestamp="2024-01-28T16:43:00Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/4/47/Extrusion_test.jpg" descriptionurl="https://wiki.fablabbcn.org/File:Extrusion_test.jpg" ns="6" title="File:Extrusion test.jpg" />
      <img name="Connector_resize_a_b.jpg" timestamp="2024-01-28T16:10:28Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/2/27/Connector_resize_a_b.jpg" descriptionurl="https://wiki.fablabbcn.org/File:Connector_resize_a_b.jpg" ns="6" title="File:Connector resize a b.jpg" />
      <img name="C_connector_resize.jpg" timestamp="2024-01-28T15:59:11Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/4/47/C_connector_resize.jpg" descriptionurl="https://wiki.fablabbcn.org/File:C_connector_resize.jpg" ns="6" title="File:C connector resize.jpg" />
      <img name="A1.jpg" timestamp="2024-01-28T15:20:48Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/1/1f/A1.jpg" descriptionurl="https://wiki.fablabbcn.org/File:A1.jpg" ns="6" title="File:A1.jpg" />
      <img name="Connector_resize.jpg" timestamp="2024-01-28T15:18:49Z" user="Ricardo" url="https://wiki.fablabbcn.org/images/b/b8/Connector_resize.jpg" descriptionurl="https://wiki.fablabbcn.org/File:Connector_resize.jpg" ns="6" title="File:Connector resize.jpg" />
    </allimages>
  </query>
</api>