how to center image in flexbox code example

Example 1: css flex center horizontally and vertically

display: flex;
align-items: center;
justify-content: center;

Example 2: center image inside flexbox

.box {
  display: flex;
  align-items: center;
  justify-content: center;
}

.box img {
  width: 100px;
  height: 100px;
}

<div class="box">
  <img>
</div>