JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
  <img src="http://via.placeholder.com/400x200" />
</div>

<div class="box">
  <img src="http://via.placeholder.com/200x400" />
</div>

CSS

.box {
  width: 200px;
  height: 200px;
  border: 1px solid black;
  margin: 10px;
}

.box img {
  object-fit: contain;
  width: 200px;
  height: 200px;
}