Vertical Align Center in Bootstrap 4

I am trying to center my Container in the middle of the page using Bootstrap 4. I have been unsuccessful thus far. Any help would be appreciated.

I have built it at Codepen.io so you guys can play with it and let me know what works as I am about out of ideas...

var currentAuthor = "";
var currentQuote  = "";
function randomQuote() {
  $.ajax({
      url: "https://api.forismatic.com/api/1.0/?",
      dataType: "jsonp",
      data: "method=getQuote&format=jsonp&lang=en&jsonp=?",
      success: function( response ) {
        $("#quote-content").html('<h2 id="quote-content" class="display-5"><i class="fa fa-quote-left" aria-hidden="true"> ' + response.quoteText + ' <i class="fa fa-quote-right" aria-hidden="true"></i></h2>');
        $("#quote-author").html('<p id="quote-author" class="lead"><em>' + response.quoteAuthor + '</em></p>');
        
        currentAuthor = response.quoteAuthor;
        currentQuote  = response.quoteText
      }
  });
}

function openURL(url){
  window.open(url,'Share', 'width=550, height=400, toolbar=0, scrollbars=1 ,location=0 ,statusbar=0,menubar=0, resizable=0');
}

function tweetQuote(){
      openURL('https://twitter.com/intent/tweet?hashtags=quotes,freecodecamp&related=freecodecamp&text=' + encodeURIComponent('"' + currentQuote + '" - ' + currentAuthor));
}

$(document).ready(function () {
    randomQuote();

    $("#get-another-quote-button").click(function(){
        randomQuote();
    });

   $('#tweet').on('click', function() {
       tweetQuote();
   });
});

html, body {
  background-image: url("https://www.mylinea.com/wp-content/uploads/beautiful-trees-stock-photo-055.jpg");
    background-color: #17234E;
    margin-bottom: 0;
    min-height: 30%;
    background-repeat: no-repeat;
    background-position: center;
    -webkit-background-size: cover;
    background-size: cover;
}


.btn-new-quote {
    color: #0C0C0D;
    background-color: transparent;
    border-color: #414147;
}

.btn-new-quote:hover {
    color: #0C0C0D;
    background-color: #9A989E;
    border-color: #0C0C0D;
}

#tweet {
    color: RGB(100, 100, 100);
}

#tweet:hover {
    color: RGB(50, 50, 50);
}


.jumbotron {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    opacity: .85;
    border-color:  RGB(50, 50, 50);
    padding-bottom: 8px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/css/bootstrap.min.css">
<div class="container">
    <div class="row justify-content-center align-self-center">
        <div class="col-sm-6">
            <div class="jumbotron vertical-center text-center">
                <h2 id="quote-content" class="display-5"><i class="fa fa-quote-left" aria-hidden="true"></i><i class="fa fa-quote-right" aria-hidden="true"></i></h2>
                <p id="quote-author" class="lead"><em></em></p>
                <hr class="my-2">
                <div class="row align-items-center justify-content-between">
                    <div class="col-sm-1-4 text-left">
                        <a id="tweet" href="#">
                            <h2 class="display-4"><i class="fa fa-twitter" aria-hidden="true"></i></h2>
                        </a>
                    </div>
                    <div class="col-sm-1-4 text-right">
                        <button id="get-another-quote-button" type="button" class="btn btn-outline-secondary  btn-new-quote">Don't Quote Me on This...</button>
                    </div>

                </div>
            </div>
        </div>
    </div>
</div>

Important! Vertical center is relative to the height of the parent

> If the parent of the element you're trying to center has no defined > height, none of the vertical centering solutions will work!

Now, onto vertical centering...

Bootstrap 5 (Updated 2021)

Bootstrap 5 is still flexbox based so vertical centering works the same way as Bootstrap 4. For example, align-items-center, justify-content-center or auto margins can used on the flexbox parent (row or d-flex).

• use align-items-center on a flexbox row parent (row or d-flex)
• use justify-content-center on a flexbox column parent (d-flex flex-column)
• use my-auto on a flexbox parent

Vertical Center in Bootstrap 5

---

Bootstrap 4

You can use the new flexbox & size utilities to make the container full-height and display: flex. These options don't require extra CSS (except that the height of the container (ie:html,body) must be 100%).

Option 1 align-self-center on flexbox child

<div class="container d-flex h-100">
    <div class="row justify-content-center align-self-center">
     I'm vertically centered
    </div>
</div>

https://codeply.com/go/fFqaDe5Oey

Option 2 align-items-center on flexbox parent (.row is display:flex; flex-direction:row)

<div class="container h-100">
    <div class="row align-items-center h-100">
        <div class="col-6 mx-auto">
            <div class="jumbotron">
                I'm vertically centered
            </div>
        </div>
    </div>
</div>

https://codeply.com/go/BumdFnmLuk

Option 3 justify-content-center on flexbox parent (.card is display:flex;flex-direction:column)

<div class="container h-100">
    <div class="row align-items-center h-100">
        <div class="col-6 mx-auto">
            <div class="card h-100 border-primary justify-content-center">
                <div>
                    ...card content...
                </div>
            </div>
        </div>
    </div>
</div>

https://codeply.com/go/3gySSEe7nd

---

More on Bootstrap 4 Vertical Centering

Now that Bootstrap 4 offers flexbox and other utilities, there are many approaches to vertical alignment. http://www.codeply.com/go/WG15ZWC4lf

1 - Vertical Center Using Auto Margins:

Another way to vertically center is to use my-auto. This will center the element within it's container. For example, h-100 makes the row full height, and my-auto will vertically center the col-sm-12 column.

<div class="row h-100">
    <div class="col-sm-12 my-auto">
        <div class="card card-block w-25">Card</div>
    </div>
</div>

Vertical Center Using Auto Margins Demo

my-auto represents margins on the vertical y-axis and is equivalent to:

margin-top: auto;
margin-bottom: auto;

---

2 - Vertical Center with Flexbox:

Since Bootstrap 4 .row is now display:flex you can simply use align-self-center on any column to vertically center it...

       <div class="row">
           <div class="col-6 align-self-center">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

or, use align-items-center on the entire .row to vertically center align all col-* in the row...

       <div class="row align-items-center">
           <div class="col-6">
                <div class="card card-block">
                 Center
                </div>
           </div>
           <div class="col-6">
                <div class="card card-inverse card-danger">
                    Taller
                </div>
          </div>
    </div>

Vertical Center Different Height Columns Demo

See this Q/A to center, but maintain equal height

---

3 - Vertical Center Using Display Utils:

Bootstrap 4 has display utils that can be used for display:table, display:table-cell, display:inline, etc.. These can be used with the vertical alignment utils to align inline, inline-block or table cell elements.

<div class="row h-50">
    <div class="col-sm-12 h-100 d-table">
        <div class="card card-block d-table-cell align-middle">
            I am centered vertically
        </div>
    </div>
</div>

Vertical Center Using Display Utils Demo

More examples
Vertical center image in <div>
Vertical center .row in .container
Vertical center and bottom in <div>
Vertical center child inside parent
Vertical center full screen jumbotron

---

Important! Did I mention height?

Remember vertical centering is relative to the height of the parent element. If you want to center on the entire page, in most cases, this should be your CSS...

body,html {
  height: 100%;
}

Or use min-height: 100vh (min-vh-100 in Bootstrap 4.1+) on the parent/container. If you want to center a child element inside the parent. The parent must have a defined height.

Also see:
https://stackoverflow.com/questions/43313090/vertical-alignment-in-bootstrap-4<br> https://stackoverflow.com/questions/42388989/bootstrap-4-center-vertical-and-horizontal-alignment

you can vertically align your container by making the parent container flex and adding align-items:center:

body {
  display:flex;
  align-items:center;
}

Updated Pen

Following bootstrap 4 classes helped me solve this

<div class="col text-center justify-content-center align-self-center">
    <img width=3rem src=".." alt="...">
</div>

Using bootstrap version 5 or later, use the code below to center the content horizontally and vertically.

<div class="vh-100 d-flex justify-content-center align-items-center">
  <h1>Centered horizontally and vertically!</h1>
</div>

Because none of the above worked for me, I am adding another answer.

Goal: To vertically and horizontally align a div on a page using bootstrap 4 flexbox classes.

Step 1: Set your outermost div to a height of 100vh. This sets the height to 100% of the Veiwport Height. If you don't do this, nothing else will work. Setting it to a height of 100% is only relative to the parent, so if the parent is not the full height of the viewport, nothing will work. In the example below, I set the Body to 100vh.

Step 2: Set the container div to be the flexbox container with the d-flex class.

Step 3: Center div horizontally with the justify-content-center class.

Step 4: Center div vertically with the align-items-center

Step 5: Run page, view your vertically and horizontally centered div.

Note that there is no special class that needs to be set on the centered div itself (the child div)

<body style="background-color:#f2f2f2; height:100vh;">

<div class="h-100 d-flex justify-content-center align-items-center">
    <div style="height:600px; background-color:white; width:600px;">
</div>
	       
</div>
   
</body>

I did it this way with Bootstrap 4.3.1:

<div class="d-flex vh-100">
  <div class="d-flex w-100 justify-content-center align-self-center">
    I'm in the middle
  </div>
</div>

.jumbotron {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

<div class="row">
  <div class="col-md-6">
     <img src="/assets/images/ebook2.png" alt="" class="img-fluid">
  </div>
  <div class="col-md-6 my-auto">
     <h3>Heading</h3>
     <p>Some text.</p>
   </div>
</div>

This line is where the magic happens <div class="col-md-6 my-auto">, the my-auto will center the content of the column. This works great with situations like the code sample above where you might have a variable sized image and need to have the text in the column to the right line up with it.

I've tried all the answers herefrom, but found out here is the difference between h-100 and vh-100 Here is my solution:

      <div className='container vh-100 d-flex align-items-center col justify-content-center'>
        <div className="">
             ...
        </div>
      </div >

In Bootstrap 4 (beta), use align-middle. Refer to Bootstrap 4 Documentation on Vertical alignment:

> Change the alignment of elements with the vertical-alignment > utilities. Please note that vertical-align only affects inline, > inline-block, inline-table, and table cell elements. > > Choose from .align-baseline, .align-top, .align-middle, .align-bottom, > .align-text-bottom, and .align-text-top as needed.

<div class="col-lg-5 col-sm-5 offset-1 d-flex">
            <div class="offer-txt justify-content-center align-self-center">
                <span class="inner-title">Our Offer</span>
                <h2 class="section-title">Today’s Special </h2>
                <p>One morning, when Gregor Samsa woke from troubled dreams, he found himself transformed in his bed into vermin. He lay on his armour-like back, and if he lifted his head a little he could see his brown belly.</p>
            </div>
        </div>

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
</head>
<body>  
<div class="container">
    <div class="row align-items-center justify-content-center" style="height:100vh;">     
         <div>Center Div Here</div>
    </div>
</div>
</body>
</html>

Vertical align Using this bootstrap 4 classes:

Method1: > parent: d-table > > AND > > child: d-table-cell & align-middle & text-center

eg:

<div class="tab-icon-holder d-table bg-light">
   <div class="d-table-cell align-middle text-center">
     <img src="assets/images/devices/Xl.png" height="30rem">
   </div>
</div>

and if you want parent be circle:

<div class="tab-icon-holder d-table bg-light rounded-circle">
   <div class="d-table-cell align-middle text-center">
     <img src="assets/images/devices/Xl.png" height="30rem">
   </div>
</div>

which two custom css classes are as follow:

.tab-icon-holder {
  width: 3.5rem;
  height: 3.5rem;
 }
.rounded-circle {
  border-radius: 50% !important
}

Final usage can be like for example:

<div class="col-md-5 mx-auto text-center">
    <div class="d-flex justify-content-around">
     <div class="tab-icon-holder d-table bg-light rounded-circle">
       <div class="d-table-cell align-middle text-center">
         <img src="assets/images/devices/Xl.png" height="30rem">
       </div>
     </div>

     <div class="tab-icon-holder d-table bg-light rounded-circle">
       <div class="d-table-cell align-middle text-center">
         <img src="assets/images/devices/Lg.png" height="30rem">
       </div>
     </div>

     ...

    </div>
</div>

Method2: You can use following:

> parent: h-100 d-table mx-auto > > AND > > child: d-table-cell align-middle

Method3:

You can use following:

> parent: d-flext align-items-center

also if you want content be center horisontally too:

> parent: d-flext align-items-center justify-content-center

use .my-auto (bootsrap4) css class on yor div

Place your content within a flexbox container that is 100% high i.e h-100. Then justify the content centrally by using justify-content-center class.

<section class="container h-100 d-flex justify-content-center">
    <div class="jumbotron my-auto">
        <h1 class="display-3">Hello, Malawi!</h1>
    </div>
</section>

For all Bootstrap versions 2, 3, 4 and 5 with only two custom classes suitable with any height and width.

.d_tbl{
  display:table;
  width:100%;
  height:200px;
}

.d_tblCel{
  vertical-align: middle;
  display: table-cell;
  text-align: center;
}

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <div class="d_tbl" style="background-color:antiquewhite">
    <div class="d_tblCel">
      <h3>Centered horizontally and vertically</h3>
      <p>for all bootstrap versions with only two custom classes</p>
    </div>
  </div>
</div>

</body>
</html>

bootstrap 5 and blazor web assembly:

<div class="d-flex align-items-center justify-content-center min" style="height: 50vh">
<button class="btn btn-outline-success mx-2">Register</button>
<button class="btn btn-outline-primary mx-2" style="width:123.44px">Login</button></div>

in Bootstrap 5 we can do it easily. Below is an example to align card. We just have to set the card width, then the rest setting are using bootstrap 5 class.

<div class="container d-flex vh-100">
  <div class="row mx-auto">
    <div class="col align-self-center p-4">
      <div class="card rounded-3 shadow-sm p-3" style="width:400px">
        <div class="card-body">
          <h1>I'am centered vertically and horizontally</h1>
        </div>
      </div>
    </div>
  </div>
</div>

In Bootstrap 4.1.3:

This worked for me when I was trying to center a bootstrap badge inside of a container > row > column next to a h1 title.

What did work was some simple css:

.my-valign-center {
  vertical-align: 50%;
}

or

<span class="badge badge-pill" style="vertical-align: 50%;">My Badge</span>