how to align in center css code example

Example 1: css align center

//HTML
<div class="parent">
	<span>Hello World</span>
</div>

//CSS
.parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

Example 2: css align center

/* This works wonderfully when you know the size of
the thing you are centering. If you don’t know, or are 
thinking it might change and want to be future proof,
try this: */

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

/* The translate value for transform is based off the size
of the element, so that will center nicely. */

Example 3: align items center css

.parent_div
{
  display:flex;
  align-items:center;
}

Example 4: css center position

/**************** 1º method to center all elements ********************/
body {                   
  text-align: center;
}

/* If all of your elements have the property display equal to "inline", 
"block" or "inline-block", then you can use the text-align: center in
the <body> tag */

tag_name {
    display: inline; /* block or inline-block*/
}

/*...but if we have an element of type "block" with a width diferente
from the default (maximum width of the page), then this will no 
longer work!*/
  
tag_name {
    display: block;
  	width: 170px;
}


/**************** 2º method to center all elements ********************/
/* Another method, is to use the margins to center the element 
horizontally and/or vertically */

tag_name {
    display: block;
  	width: 100px;
  	margin: 0 auto 0 auto;  /* top, right, bottom, left */
}

Tags:

Html Example