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="20210324072739|Оффлан_деактивация.PNG" />
  </query-continue>
  <query>
    <allimages>
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      <img name="MES_PT_Integration_0.PNG" timestamp="2021-05-21T12:39:51Z" user="Vladimir Bazhin" url="http://archestra.info/images/4/40/MES_PT_Integration_0.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:MES_PT_Integration_0.PNG" ns="6" title="Файл:MES PT Integration 0.PNG" />
      <img name="PlanetTogether_Excel_Import_Template_08212020.zip" timestamp="2021-05-19T07:25:09Z" user="Vladimir Bazhin" url="http://archestra.info/images/5/56/PlanetTogether_Excel_Import_Template_08212020.zip" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:PlanetTogether_Excel_Import_Template_08212020.zip" ns="6" title="Файл:PlanetTogether Excel Import Template 08212020.zip" />
      <img name="PT_excel_arch.PNG" timestamp="2021-05-10T18:24:22Z" user="Vladimir Bazhin" url="http://archestra.info/images/e/ef/PT_excel_arch.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:PT_excel_arch.PNG" ns="6" title="Файл:PT excel arch.PNG" />
      <img name="PT_2monitors.png" timestamp="2021-05-06T10:41:27Z" user="Vladimir Bazhin" url="http://archestra.info/images/1/15/PT_2monitors.png" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:PT_2monitors.png" ns="6" title="Файл:PT 2monitors.png" />
      <img name="Scenario_demo_PT.PNG" timestamp="2021-05-05T12:11:32Z" user="Vladimir Bazhin" url="http://archestra.info/images/3/3d/Scenario_demo_PT.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:Scenario_demo_PT.PNG" ns="6" title="Файл:Scenario demo PT.PNG" />
      <img name="Scenario_demo.PNG" timestamp="2021-05-05T12:08:42Z" user="Vladimir Bazhin" url="http://archestra.info/images/d/d1/Scenario_demo.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:Scenario_demo.PNG" ns="6" title="Файл:Scenario demo.PNG" />
      <img name="MES_PT_attributes.PNG" timestamp="2021-05-05T12:05:48Z" user="Vladimir Bazhin" url="http://archestra.info/images/e/e1/MES_PT_attributes.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:MES_PT_attributes.PNG" ns="6" title="Файл:MES PT attributes.PNG" />
      <img name="MES_PT_Integration.PNG" timestamp="2021-05-05T09:58:12Z" user="Vladimir Bazhin" url="http://archestra.info/images/6/6e/MES_PT_Integration.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:MES_PT_Integration.PNG" ns="6" title="Файл:MES PT Integration.PNG" />
      <img name="Оффлайн_деактивация_2.PNG" timestamp="2021-03-24T07:40:34Z" user="Vasily" url="http://archestra.info/images/4/4b/%D0%9E%D1%84%D1%84%D0%BB%D0%B0%D0%B9%D0%BD_%D0%B4%D0%B5%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D1%8F_2.PNG" descriptionurl="http://archestra.info/index.php/%D0%A4%D0%B0%D0%B9%D0%BB:%D0%9E%D1%84%D1%84%D0%BB%D0%B0%D0%B9%D0%BD_%D0%B4%D0%B5%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D1%8F_2.PNG" ns="6" title="Файл:Оффлайн деактивация 2.PNG" />
    </allimages>
  </query>
</api>