Bootstrap Center Vertical and Horizontal Alignment - css

Question

I have a page where only form exists and I want form to be placed in the center of the screen.
<div class="container">
<div class="row justify-content-center align-items-center">
<form>
<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>
The justify-content-center aligns the form horizontally, but I can't figure out how to align it vertically. I have tried to use align-items-center and align-self-center, but it doesn't work.
What am I missing?
DEMO

Answer 1

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

Answer 2

This work for me:
<section class="h-100">
<header class="container h-100">
<div class="d-flex align-items-center justify-content-center h-100">
<div class="d-flex flex-column">
<h1 class="text align-self-center p-2">item 1</h1>
<h4 class="text align-self-center p-2">item 2</h4>
<button class="btn btn-danger align-self-center p-2" type="button" name="button">item 3</button>
</div>
</div>
</header>
</section>

Answer 3

flexbox can help you. info here
<div class="d-flex flex-row justify-content-center align-items-center" style="height: 100px;">
<div class="p-2">
1
</div>
<div class="p-2">
2
</div>
</div>

Answer 4

Bootstrap has text-center to center a text. For example
<div class="container text-center">
You change the following
<div class="row justify-content-center align-items-center">
to the following
<div class="row text-center">

Answer 5

You need something to center your form into. But because you didn't specify a height for your html and body, it would just wrap content - and not the viewport. In other words, there was no room where to center the item in.
html, body {
height: 100%;
}
.container, .row.justify-content-center.align-items-center {
height: 100%;
min-height: 100%;
}

Answer 6

None has worked for me. But his one did.
Since the Bootstrap 4 .row class is now display:flex you can simply use the new align-self-center flexbox utility 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>
I learned about it from https://medium.com/wdstack/bootstrap-4-vertical-center-1211448a2eff

Answer 7

This is working in IE 11 with Bootstrap 4.3. While the other answers were not working in IE11 in my case.
<div class="row mx-auto justify-content-center align-items-center flex-column ">
<div class="col-6">Something </div>
</div>

Answer 8

Try the code given below while using v4 or v5.
<div class="d-flex align-items-center justify-content-center" style="height:100vh;">
Vertically and Horizontally Aligned :)
</div>
...OR... You can use these classes if using v5.
<div class="position-absolute top-50 start-50 translate-middle">
Vertically and Horizontally Aligned :)
</div>
Do this, and that's it :)

Answer 9

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-12 border border-info">
<div class="d-flex justify-content-center align-items-center" style="height: 100px">
Transfer
Replenish
Account Details
</div>
</div>

Answer 10

been going thru a lot of posts on getting a form centered in the page and none of them worked. code below is from a react component using bootstrap 4.1. height should be 100vh and not 100%
<div className="container">
<div className="d-flex justify-content-center align-items-center" style={height}>
<form>
<div className="form-group">
<input className="form-control form-control-lg" placeholder="Email" type="email"/>
</div>
<div className="form-group">
<input className="form-control form-control-lg" placeholder="Password" type="password"/>
</div>
<div className="form-group">
<button className="btn btn-info btn-lg btn-block">Sign In</button>
</div>
</form>
</div>
</div>
where height in style is:
const height = {
height: '100vh'
}

Answer 11

From bootstrap v5.0 just:
<div class="position-absolute top-50 start-50 translate-middle">
centred
</div>

Answer 12

Bootstrap way
HTML
<div class="row top-row">
<div class="col center-text">
<H1>Center Text Horizantally and vertically</H1>
</div>
</div>
Custom CSS
.top-row{
height: 300px; //It's important to set height
}
.center-text{
display: flex;
align-items: center;
justify-content: center;
}

Answer 13

I ended up here because I was having an issue with Bootstrap 4 grid system and an Angular *ngFor loop. I fixed it by applying a col justify-content-center class to the div implementing the ngFor:
<div class="row" style="border:1px solid red;">
<div class="col d-flex justify-content-center">
<button mat-raised-button>text</button>
</div>
<div *ngFor="let text of buttonText" class="col d-flex justify-content-center">
<button mat-raised-button>text</button>
</div>
</div>
which gives the result:

Answer 14

I am required to show form vertically center inside container-fluid so I developed my own code for the same.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<style>
.container-fluid
{
display: table-cell;
height: 100vh;
width: 100vw !important;
vertical-align: middle;
border:1px solid black;
}
</style>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-8 offset-2">
<div class="card shadow">
<div class="card-header bg-danger text-white">
<h2>Login</h2>
</div>
<div class="card-body">
<form action="">
<div class="form-group row">
<label for="txtemail" class="col-form-label col-sm-2">Email</label>
<div class="col-sm-10">
<input type="email" name="txtemail" id="txtemail" class="form-control" required />
</div>
</div>
<div class="form-group row">
<label for="txtpassword" class="col-form-label col-sm-2">Password</label>
<div class="col-sm-10">
<input type="password" name="txtpassword" id="txtpassword" class="form-control"
required />
</div>
</div>
<div class="form-group">
<button class="btn btn-danger btn-block">Login</button>
<button class="btn btn-warning btn-block">clear all</button>
</div>
</form>
</div>
</div>
</div>
</div>
<script src="js/jquery.js"></script>
<script src="js/popper.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>

Answer 15

Use This Code In CSS :
.container {
width: 600px;
height: 350px;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
display: inline-flex;
}

Answer 16

From the doc (bootsrap 4):
https://getbootstrap.com/docs/4.0/utilities/flex/#justify-content
.justify-content-start
.justify-content-end
.justify-content-center
.justify-content-between
.justify-content-around
.justify-content-sm-start
.justify-content-sm-end
.justify-content-sm-center
.justify-content-sm-between
.justify-content-sm-around
.justify-content-md-start
.justify-content-md-end
.justify-content-md-center
.justify-content-md-between
.justify-content-md-around
.justify-content-lg-start
.justify-content-lg-end
.justify-content-lg-center
.justify-content-lg-between
.justify-content-lg-around
.justify-content-xl-start
.justify-content-xl-end
.justify-content-xl-center
.justify-content-xl-between
.justify-content-xl-around

Answer 17

bootstrap 5
body {
display: flex;
align-items: center;
}
https://getbootstrap.com/docs/5.1/examples/sign-in/