https:
<!DOCTYPE html>
<html>
<style>
* {
box-sizing: border-box;
}
body {
margin: 0;
font-family: Arial;
}
.header {
text-align: center;
padding: 32px;
}
.row {
display: -ms-flexbox;
display: flex;
-ms-flex-wrap: wrap;
flex-wrap: wrap;
padding: 0 4px;
}
.column {
-ms-flex: 25%;
flex: 25%;
max-width: 25%;
padding: 0 4px;
}
.column img {
margin-top: 8px;
vertical-align: middle;
width: 100%;
}
@media screen and (max-width: 800px) {
.column {
-ms-flex: 50%;
flex: 50%;
max-width: 50%;
}
}
@media screen and (max-width: 600px) {
.column {
-ms-flex: 100%;
flex: 100%;
max-width: 100%;
}
}
</style>
<body>
<div class="header">
<h1>Bootstrap Responsive Image Grid</h1>
<p>Resize the browser window to see the responsive effect.</p>
</div>
<div class="row">
<div class="column">
<img src="https://i.ibb.co/9N66jGM/1.jpg">
<img src="https://i.ibb.co/kSRxQC2/2.jpg">
<img src="https://i.ibb.co/8r1GyHz/3.jpg">
</div>
<div class="column">
<img src="https://i.ibb.co/WWt4vMv/4.jpg">
<img src="https://i.ibb.co/hdYj3mF/5.jpg">
<img src="https://i.ibb.co/NZWR2CW/6.jpg">
</div>
<div class="column">
<img src="https://i.ibb.co/wzpJ8vc/7.jpg">
<img src="https://i.ibb.co/yVGFPPw/8.jpg">
<img src="https://i.ibb.co/wzpJ8vc/7.jpg">
</div>
<div class="column">
<img src="https://i.ibb.co/kSRxQC2/2.jpg">
<img src="https://i.ibb.co/1s2NR9J/11.jpg">
<img src="https://i.ibb.co/8r1GyHz/3.jpg">
</div>
</div>
</body>
</html>