Bootstrap – Center a div horizontally and vertically

we are going to learn about how to center a div horizontally and 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 horizontaly and vertically in Bootstrap, add the utlity class d-flex and justify-content-center, align-items-center to the div element class attribute.

“justify-content-center” centers the div horizontally.

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

Here is an example:

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

.center{    display: flex;    justify-content: center;    align-items: center;    height: 100vh;}

Centering div horizontally, vertically using absolute position

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

Here is an example:

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

.center{   position:absolute;   left:50%;   top:50%;   transform:translate(-50%, -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 left:50% moves the element 50% right from its position.

3. The top:50% moves the element 50% down from its position.

4. The translate(-50%, -50%) moves the element 50% up, 50% left of it’s position.