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---
title: Images
description: Documentation and examples for opting images into responsive behavior (so they never become wider than their parent) and add lightweight styles to them—all via classes.
toc: true
---
## Responsive images
Images in Bootstrap are made responsive with `.img-fluid`. This applies `max-width: 100%;` and `height: auto;` to the image so that it scales with the parent width.
<Example code={`<Placeholder width="100%" height="250" class="bd-placeholder-img-lg img-fluid" text="Responsive image" />`} />
## Image thumbnails
In addition to our [border-radius utilities]([[docsref:/utilities/borders]]), you can use `.img-thumbnail` to give an image a rounded 1px border appearance.
<Example code={`<Placeholder width="200" height="200" class="img-thumbnail" title="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera" />`} />
## Aligning images
Align images with the [helper float classes]([[docsref:/utilities/float]]) or [text alignment classes]([[docsref:/utilities/text#text-alignment]]). `block`-level images can be centered using [the `.mx-auto` margin utility class]([[docsref:/utilities/spacing#horizontal-centering]]).
<Example code={`<Placeholder width="200" height="200" class="rounded float-start" />
<Placeholder width="200" height="200" class="rounded float-end" />`} />
<Example code={`<Placeholder width="200" height="200" class="rounded mx-auto d-block" />`} />
<Example code={`<div class="text-center">
<Placeholder width="200" height="200" class="rounded" />
</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.
```html
<picture>
<source srcset="..." type="image/svg+xml">
<img src="..." class="img-fluid img-thumbnail" alt="...">
</picture>
```
## CSS
### Sass variables
Variables are available for image thumbnails.
<ScssDocs name="thumbnail-variables" file="scss/_variables.scss" />