Vertical and Horizontal Align (Middle and Center) with CSS

.container {    position: absolute;    top: 50%;    left: 50%;    -moz-transform: translateX(-50%) translateY(-50%);    -webkit-transform: translateX(-50%) translateY(-50%);    transform: translateX(-50%) translateY(-50%);}

<div class="container">    <span>I'm vertically/horizontally centered!</span></div>

How can I center text (horizontally and vertically) inside a div block?

If it is one line of text and/or image, then it is easy to do. Just use:

text-align: center;
vertical-align: middle;
line-height: 90px;       /* The same as your div height */

That's it. If it can be multiple lines, then it is somewhat more complicated. But there are solutions on http://pmob.co.uk/. Look for "vertical align".

Since they tend to be hacks or adding complicated divs... I usually use a table with a single cell to do it... to make it as simple as possible.

Update for 2020:

Unless you need make it work on earlier browsers such as Internet Explorer 10, you can use flexbox. It is widely supported by all current major browsers. Basically, the container needs to be specified as a flex container, together with centering along its main and cross axis:

#container {
  display: flex;
  justify-content: center;
  align-items: center;
}

To specify a fixed width for the child, which is called a "flex item":

#content {
  flex: 0 0 120px;
}

Example: http://jsfiddle.net/2woqsef1/1/

To shrink-wrap the content, it is even simpler: just remove the flex: ... line from the flex item, and it is automatically shrink-wrapped.

Example: http://jsfiddle.net/2woqsef1/2/

The examples above have been tested on major browsers including MS Edge and Internet Explorer 11.

One technical note if you need to customize it: inside of the flex item, since this flex item is not a flex container itself, the old non-flexbox way of CSS works as expected. However, if you add an additional flex item to the current flex container, the two flex items will be horizontally placed. To make them vertically placed, add the flex-direction: column; to the flex container. This is how it works between a flex container and its immediate child elements.

There is an alternative method of doing the centering: by not specifying center for the distribution on the main and cross axis for the flex container, but instead specify margin: auto on the flex item to take up all extra space in all four directions, and the evenly distributed margins will make the flex item centered in all directions. This works except when there are multiple flex items. Also, this technique works on MS Edge but not on Internet Explorer 11.

Update for 2016 / 2017:

It can be more commonly done with transform, and it works well even in older browsers such as Internet Explorer 10 and Internet Explorer 11. It can support multiple lines of text:

position: relative;
top: 50%;
transform: translateY(-50%);

Example: https://jsfiddle.net/wb8u02kL/1/

To shrink-wrap the width:

The solution above used a fixed width for the content area. To use a shrink-wrapped width, use

position: relative;
float: left;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);

Example: https://jsfiddle.net/wb8u02kL/2/

If the support for Internet Explorer 10 is needed, then flexbox won't work and the method above and the line-height method would work. Otherwise, flexbox would do the job.

Bootstrap Center Vertical and Horizontal Alignment

Bootstrap 5 (Updated 2021)

Bootstrap 5 is still flexbox based so vertical centering works the same way as it did in Bootstrap 4. For example, align-items-center (flex-direction: row) and justify-content-center (flex-direction: column) can used on the flexbox parent (row or d-flex).

Centering examples in Bootstrap 5

Vertical center (don't forget the parent must have a defined height!):

• my-auto for centering inside flex (.d-flex) elements
• my-auto can be used to center columns (.col-) inside row
• align-items-center to center columns (col-*) inside row

Horizontal center:

• text-center to center display:inline elements & column content
• mx-auto for centering inside flex elements
• mx-auto can be used to center columns (.col-) inside row
• justify-content-center to center columns (col-*) inside row

Bootstrap 4.3+ (Update 2019)

There's no need for extra CSS. What's already included in Bootstrap will work. Make sure the container(s) of the form are full height. Bootstrap 4 now has a h-100 class for 100% height...

Vertical center:

<div class="container h-100">
  <div class="row h-100 justify-content-center align-items-center">
    <form class="col-12">
      <div class="form-group">
        <label for="formGroupExampleInput">Example label</label>
        <input type="text" class="form-control" id="formGroupExampleInput" placeholder="Example input">
      </div>
      <div class="form-group">
        <label for="formGroupExampleInput2">Another label</label>
        <input type="text" class="form-control" id="formGroupExampleInput2" placeholder="Another input">
      </div>
    </form>   
  </div>
</div>

https://codeply.com/go/raCutAGHre

the height of the container with the item(s) to center should be 100%
(or whatever the desired height is relative to the centered item)

Note: When using height:100% (percentage height) on any element, the element takes in the height of it's container. In modern browsers vh units height:100vh; can be used instead of % to get the desired height.

Therefore, you can set html, body {height: 100%}, or use the new min-vh-100 class on container instead of h-100.

Horizontal center:

• text-center to center display:inline elements & column content
• mx-auto for centering inside flex elements
• offset-* or mx-auto can be used to center columns (.col-)
• justify-content-center to center columns (col-*) inside row

Vertical Align Center in Bootstrap

Bootstrap 4 full-screen centered form

Bootstrap 4 center input group

Bootstrap 4 horizontal + vertical center full screen

Center a DIV horizontally and vertically

After trying a lot of things I find a way that works. I share it here if it is useful to anyone. You can see it here working: http://jsbin.com/iquviq/30/edit

.content {
        width: 200px;
        height: 600px;
        background-color: blue;
        position: absolute; /*Can also be `fixed`*/
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        margin: auto;
        /*Solves a problem in which the content is being cut when the div is smaller than its' wrapper:*/
        max-width: 100%;
        max-height: 100%;
        overflow: auto;
}

Flexbox: center horizontally and vertically

I think you want something like the following.

html, body {
    height: 100%;
}
body {
    margin: 0;
}
.flex-container {
    height: 100%;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.row {
    width: auto;
    border: 1px solid blue;
}
.flex-item {
    background-color: tomato;
    padding: 5px;
    width: 20px;
    height: 20px;
    margin: 10px;
    line-height: 20px;
    color: white;
    font-weight: bold;
    font-size: 2em;
    text-align: center;
}

<div class="flex-container">
    <div class="row"> 
        <div class="flex-item">1</div>
        <div class="flex-item">2</div>
        <div class="flex-item">3</div>
        <div class="flex-item">4</div>
    </div>
</div>

#inner {
  width: 50%;
  margin: 0 auto;
}

#inner {
  display: table;
  margin: 0 auto;
}

#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>