Untitled

dabblet.css

.container {
  float: left;
  width: 180px;
  height: 210px;
  text-align: center;
  border: 1px solid red;
  line-height: 210px;
  }
  .container > img {
    width: auto;
    max-width: 100%;
    max-height: 100%;    
    vertical-align: middle;
    }

dabblet.html

<div class='container'>
  <image src='http://www.lorempixel.com/100/200' />
</div>
<div class='container'>
  <image src='http://www.lorempixel.com/200/200' />
</div>
<div class='container'>
  <image src='http://www.lorempixel.com/300/400' />
</div>
<div class='container'>
  <image src='http://www.lorempixel.com/100/100' />
</div>
<div class='container'>
  <image src='http://www.lorempixel.com/400/200' />
</div>
<div class='container'>
  <image src='http://www.lorempixel.com/300/100' />
</div>

settings.json

{"view":"separate","fontsize":"100","seethrough":"1","prefixfree":"1","page":"all"}