Images
Documentation and examples for opting images into responsive behavior (so they never become larger than their parent elements) and add lightweight styles to them—all via classes.
Responsive images
Images in Bootstrap are made responsive with .img-fluid. max-width: 100%; and height: auto; are applied to the image so that it scales with the parent element.
<svg class="bd-placeholder-img bd-placeholder-img-lg img-fluid" width="100%" height="250" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Placeholder: Responsive image" preserveAspectRatio="xMidYMid slice" focusable="false"><title>Placeholder</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">Responsive image</text></svg>
SVG images and Internet Explorer
In Internet Explorer 10 and 11, SVG images with .img-fluid are disproportionately sized. To fix this, add width: 100%; or .w-100 where necessary. This fix improperly sizes other image formats, so Bootstrap doesn’t apply it automatically.
Image thumbnails
In addition to our border-radius utilities, you can use .img-thumbnail to give an image a rounded 1px border appearance.
<svg class="bd-placeholder-img img-thumbnail" width="200" height="200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera: 200x200" preserveAspectRatio="xMidYMid slice" focusable="false"><title>A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">200x200</text></svg>
Aligning images
Align images with the helper float classes or text alignment classes. block-level images can be centered using the .mx-auto margin utility class.
<svg class="bd-placeholder-img rounded float-left" width="200" height="200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Placeholder: 200x200" preserveAspectRatio="xMidYMid slice" focusable="false"><title>Placeholder</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">200x200</text></svg>
<svg class="bd-placeholder-img rounded float-right" width="200" height="200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Placeholder: 200x200" preserveAspectRatio="xMidYMid slice" focusable="false"><title>Placeholder</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">200x200</text></svg>
<svg class="bd-placeholder-img rounded mx-auto d-block" width="200" height="200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Placeholder: 200x200" preserveAspectRatio="xMidYMid slice" focusable="false"><title>Placeholder</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">200x200</text></svg>
<div class="text-center">
<svg class="bd-placeholder-img rounded" width="200" height="200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Placeholder: 200x200" preserveAspectRatio="xMidYMid slice" focusable="false"><title>Placeholder</title><rect width="100%" height="100%" fill="#6c757d"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">200x200</text></svg>
</div>
Picture
If you are using the <picture> element to specify multiple <source> elements for a specific <img>, make sure to add the .img-* classes to the <img> and not to the <picture> tag.
<picture>
<source srcset="..." type="image/svg+xml">
<img src="..." class="img-fluid img-thumbnail" alt="...">
</picture>