CSS

centering div horizontally

/*<div class="content">This works with any content</div>*/
.content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

center div horizontally

/* margin auto does the magic, make sure to provide width less than 100% */
.center {
	margin: auto;
    width: 400px;
}

.center {
	margin: auto;
    width: 50%;
}

how to center horizontally in css

.content {
	 position: absolute;
     text-align: center;
     top: 50%;
}

how to horizontally center in css

.<your-outer-div> {
  display: flex;
  justify-content: center;
  ('align-items: center' will allow you to vertically center too ;))
}

center div horizontally

.inner{
margin: 0 auto;
}

How to horizontally center an element

You can apply this CSS to the inner <div>:

#inner {
  width: 50%;
  margin: 0 auto;
}
Of course, you don't have to set the width to 50%. Any width less than the containing <div> will work. The margin: 0 auto is what does the actual centering.

If you are targeting Internet Explorer 8 (and later), it might be better to have this instead:

#inner {
  display: table;
  margin: 0 auto;
}
It will make the inner element center horizontally and it works without setting a specific width.

Working example here:

#inner {
  display: table;
  margin: 0 auto;
  border: 1px solid black;
}

#outer {
  border: 1px solid red;
  width:100%
}
<div id="outer">
  <div id="inner">Foo foo</div>
</div>

center div element horizontally

<div class="center">this content will be in the horizontally centered of your page</div>
<style>
/** this is the css to center a DIV or any element **/
.center {
  display: table;
  margin: 0 auto;
}
</style>

center element horizontally in div

#inner {
  display: table;
  margin: 0 auto;
  border: 1px solid black;
}

#outer {
  border: 1px solid red;
  width:100%
}

<-- Html -->

<div id="outer">
  <div id="inner">Foo foo</div>
</div>

html - How to horizontally center an element

You can apply this CSS to the inner <div>:

#inner {   width: 50%;   margin: 0 auto; } 
Of course, you don't have to set the width to 50%. Any width less than the containing <div> will work. The margin: 0 auto is what does the actual centering.

If you are targeting Internet Explorer 8 (and later), it might be better to have this instead:

#inner {   display: table;   margin: 0 auto; } 
It will make the inner element center horizontally and it works without setting a specific width.

Working example here:

#inner {   display: table;   margin: 0 auto;   border: 1px solid black; }  #outer {   border: 1px solid red;   width:100% }
<div id="outer">   <div id="inner">Foo foo</div> </div>
EDIT
With flexbox it is very easy to style the div horizontally and vertically centered.

#inner {     border: 1px solid black; }  #outer {   border: 1px solid red;   width:100%;   display: flex;   justify-content: center; }
<div id="outer">   <div id="inner">Foo foo</div> </div>
To align the div vertically centered, use the property align-items: center.