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| --- | |
| title: Image Optimization | |
| description: Learn how to optimize images in Next.js | |
| related: | |
| title: API Reference | |
| description: See the API Reference for the full feature set of Next.js Image. | |
| links: | |
| - app/api-reference/components/image | |
| --- | |
| The Next.js [`<Image>`](/docs/app/api-reference/components/image) component extends the HTML `<img>` element to provide: | |
| - **Size optimization:** Automatically serving correctly sized images for each device, using modern image formats like WebP. | |
| - **Visual stability:** Preventing [layout shift](https://web.dev/articles/cls) automatically when images are loading. | |
| - **Faster page loads:** Only loading images when they enter the viewport using native browser lazy loading, with optional blur-up placeholders. | |
| - **Asset flexibility:** Resizing images on-demand, even images stored on remote servers. | |
| To start using `<Image>`, import it from `next/image` and render it within your component. | |
| ```tsx filename="app/page.tsx" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return <Image src="" alt="" /> | |
| } | |
| ``` | |
| ```jsx filename="app/page.js" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return <Image src="" alt="" /> | |
| } | |
| ``` | |
| The `src` property can be a [local](#local-images) or [remote](#remote-images) image. | |
| > **🎥 Watch:** Learn more about how to use `next/image` → [YouTube (9 minutes)](https://youtu.be/IU_qq_c_lKA). | |
| ## Local images | |
| You can store static files, like images and fonts, under a folder called [`public`](/docs/app/api-reference/file-conventions/public-folder) in the root directory. Files inside `public` can then be referenced by your code starting from the base URL (`/`). | |
| <Image | |
| alt="Folder structure showing app and public folders" | |
| srcLight="/docs/light/public-folder.png" | |
| srcDark="/docs/dark/public-folder.png" | |
| width="1600" | |
| height="282" | |
| /> | |
| ```tsx filename="app/page.tsx" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src="/profile.png" | |
| alt="Picture of the author" | |
| width={500} | |
| height={500} | |
| /> | |
| ) | |
| } | |
| ``` | |
| ```jsx filename="app/page.js" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src="/profile.png" | |
| alt="Picture of the author" | |
| width={500} | |
| height={500} | |
| /> | |
| ) | |
| } | |
| ``` | |
| If the image is statically imported, Next.js will automatically determine the intrinsic [`width`](/docs/app/api-reference/components/image#width-and-height) and [`height`](/docs/app/api-reference/components/image#width-and-height). These values are used to determine the image ratio and prevent [Cumulative Layout Shift](https://web.dev/articles/cls) while your image is loading. | |
| ```tsx filename="app/page.tsx" switcher | |
| import Image from 'next/image' | |
| import ProfileImage from './profile.png' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src={ProfileImage} | |
| alt="Picture of the author" | |
| // width={500} automatically provided | |
| // height={500} automatically provided | |
| // blurDataURL="data:..." automatically provided | |
| // placeholder="blur" // Optional blur-up while loading | |
| /> | |
| ) | |
| } | |
| ``` | |
| ```jsx filename="app/page.js" switcher | |
| import Image from 'next/image' | |
| import ProfileImage from './profile.png' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src={ProfileImage} | |
| alt="Picture of the author" | |
| // width={500} automatically provided | |
| // height={500} automatically provided | |
| // blurDataURL="data:..." automatically provided | |
| // placeholder="blur" // Optional blur-up while loading | |
| /> | |
| ) | |
| } | |
| ``` | |
| ## Remote images | |
| To use a remote image, you can provide a URL string for the `src` property. | |
| ```tsx filename="app/page.tsx" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src="https://s3.amazonaws.com/my-bucket/profile.png" | |
| alt="Picture of the author" | |
| width={500} | |
| height={500} | |
| /> | |
| ) | |
| } | |
| ``` | |
| ```jsx filename="app/page.js" switcher | |
| import Image from 'next/image' | |
| export default function Page() { | |
| return ( | |
| <Image | |
| src="https://s3.amazonaws.com/my-bucket/profile.png" | |
| alt="Picture of the author" | |
| width={500} | |
| height={500} | |
| /> | |
| ) | |
| } | |
| ``` | |
| Since Next.js does not have access to remote files during the build process, you'll need to provide the [`width`](/docs/app/api-reference/components/image#width-and-height), [`height`](/docs/app/api-reference/components/image#width-and-height) and optional [`blurDataURL`](/docs/app/api-reference/components/image#blurdataurl) props manually. The `width` and `height` are used to infer the correct aspect ratio of image and avoid layout shift from the image loading in. Alternatively, you can use the [`fill` property](/docs/app/api-reference/components/image#fill) to make the image fill the size of the parent element. | |
| To safely allow images from remote servers, you need to define a list of supported URL patterns in [`next.config.js`](/docs/app/api-reference/config/next-config-js). Be as specific as possible to prevent malicious usage. For example, the following configuration will only allow images from a specific AWS S3 bucket: | |
| ```ts filename="next.config.ts" switcher | |
| import type { NextConfig } from 'next' | |
| const config: NextConfig = { | |
| images: { | |
| remotePatterns: [ | |
| { | |
| protocol: 'https', | |
| hostname: 's3.amazonaws.com', | |
| port: '', | |
| pathname: '/my-bucket/**', | |
| search: '', | |
| }, | |
| ], | |
| }, | |
| } | |
| export default config | |
| ``` | |
| ```js filename="next.config.js" switcher | |
| module.exports = { | |
| images: { | |
| remotePatterns: [ | |
| { | |
| protocol: 'https', | |
| hostname: 's3.amazonaws.com', | |
| port: '', | |
| pathname: '/my-bucket/**', | |
| search: '', | |
| }, | |
| ], | |
| }, | |
| } | |
| ``` | |