html center of the page code example

Example 1: align in the middle of page html

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  /* bring your own prefixes */
  transform: translate(-50%, -50%);
}

Example 2: how to make web page center

#page-wrap {
     width: 800px;
     margin: 0 auto;
}