by Sai gowtham

Bootstrap - Center a div element vertically

In this tutorial, we are going to learn about how to center a div element vertically in Bootstrap with the help of examples.

Consider, that we have the following div element in Bootstrap:

<div>
  <h1>Hello, User</h1>
</div>

To center a div vertically in Bootstrap, add the utlity class d-flex and align-items-center to the div element class attribute.

“align-items-center” centers the div vertically.

Here is an example:

<div class="d-flex align-items-center" style="100vh">
  <h1>Hello, User</h1>
</div>

Note: The above utility classes use the flexbox which can work on Bootstrap 4, and 5 versions.

If you are using the bootstrap version which is below 4, then you can add the flexbox using the custom CSS class.

<div class="center-v">
  <h1>Hello, User</h1>
</div>
.center-h{
    display: flex;
    align-items: center;
    height: 100vh;
}

Centering the div vertically using absolute position

We can use the css absolute positioning in bootstrap to center a div vertically

Here is an example:

<div class="center-v">
     <h1>Hello, User</h1>
</div>
.center-v{
   position: absolute;
   top: 50%;
   transform: translateY(-50%);
}
  1. Here we added position:absolute to the div element, so the element breaks out from the normal document flow and is positioned to its relative parent (eg: body or parent element).

  2. The top:50% moves the element 50% bottom from its position.

  3. The translateX(-50%) moves the element 50% up from it’s position.

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