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="Bibai-ritu.jpg" timestamp="2013-08-12T09:32:33Z" url="https://tonden.org/wiki/images/2/21/Bibai-ritu.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bibai-ritu.jpg" ns="6" title="ファイル:Bibai-ritu.jpg" />
      <img name="Bibai_heioku.JPG" timestamp="2013-06-27T00:12:23Z" url="https://tonden.org/wiki/images/0/0b/Bibai_heioku.JPG" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bibai_heioku.JPG" ns="6" title="ファイル:Bibai heioku.JPG" />
      <img name="Bibai_heioku2.jpg" timestamp="2013-09-18T08:35:08Z" url="https://tonden.org/wiki/images/5/58/Bibai_heioku2.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bibai_heioku2.jpg" ns="6" title="ファイル:Bibai heioku2.jpg" />
      <img name="Bibaiheioku_ritu.jpg" timestamp="2013-08-13T00:52:22Z" url="https://tonden.org/wiki/images/8/89/Bibaiheioku_ritu.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bibaiheioku_ritu.jpg" ns="6" title="ファイル:Bibaiheioku ritu.jpg" />
      <img name="Bibaitondenhei.jpg" timestamp="2014-10-15T01:15:35Z" url="https://tonden.org/wiki/images/e/e8/Bibaitondenhei.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bibaitondenhei.jpg" ns="6" title="ファイル:Bibaitondenhei.jpg" />
      <img name="Bousi2.jpeg" timestamp="2014-11-03T02:14:23Z" url="https://tonden.org/wiki/images/f/f7/Bousi2.jpeg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Bousi2.jpeg" ns="6" title="ファイル:Bousi2.jpeg" />
      <img name="Capron.jpg" timestamp="2014-06-19T03:37:42Z" url="https://tonden.org/wiki/images/3/38/Capron.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Capron.jpg" ns="6" title="ファイル:Capron.jpg" />
      <img name="Cov2_kuro.jpg" timestamp="2014-05-14T01:57:07Z" url="https://tonden.org/wiki/images/6/64/Cov2_kuro.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Cov2_kuro.jpg" ns="6" title="ファイル:Cov2 kuro.jpg" />
      <img name="Cov_yamahana.jpg" timestamp="2013-06-30T23:37:07Z" url="https://tonden.org/wiki/images/d/db/Cov_yamahana.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Cov_yamahana.jpg" ns="6" title="ファイル:Cov yamahana.jpg" />
      <img name="Ebeotuhei.jpg" timestamp="2014-11-03T02:46:10Z" url="https://tonden.org/wiki/images/5/5b/Ebeotuhei.jpg" descriptionurl="https://tonden.org/wiki/index.php?title=%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Ebeotuhei.jpg" ns="6" title="ファイル:Ebeotuhei.jpg" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Ebetu_kayakuko.jpg" />
  </query-continue>
</api>