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Nov 28, 2025
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Cloudflare: Add image optimization docs #197

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27 changes: 23 additions & 4 deletions pages/cloudflare/howtos/image.mdx
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Expand Up @@ -4,16 +4,35 @@ import { Callout } from "nextra/components";

Next.js has a builtin [`<Image>` component](https://nextjs.org/docs/pages/building-your-application/optimizing/images) to automatically optimize your images for faster page loads.
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@vicb vicb Nov 28, 2025

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I think we should add a note here saying that optimizing images with the adapter requires either an image binding or a custom loader and if none are provided, images are served unchanged


In this post, we will look at how to integrate the Next.js image optimization with [Cloudflare Images](https://developers.cloudflare.com/images)
### Use Cloudflare Images

### Enable Cloudflare Images
The Cloudflare adapter provides a Next.js-compatible image optimization API using [Cloudflare Images](https://developers.cloudflare.com/images/) that can be [configured with `next.config.js`](https://nextjs.org/docs/app/api-reference/components/image#configuration-options).

You first need to [enable Cloudflare Images](https://developers.cloudflare.com/images/get-started/#enable-transformations-on-your-zone) for your zone.
The `IMAGES` binding must be defined to enable image optimization.

It is strongly advised to restrict the image origins that can be transformed to where your images are hosted, i.e. a [R2 bucket](https://developers.cloudflare.com/r2/buckets/).
```jsonc
// wrangler.jsonc
{
"images": {
"binding": "IMAGES",
},
}
```

Image optimization can incur additional costs. See [Cloudflare Images pricing](https://developers.cloudflare.com/images/pricing/) for details.

#### Compatibility notes

- Only PNG, JPEG, WEBP, AVIF, GIF, and SVG are supported. Unsupported images will be returned unchanged without optimization.
- [`minimumCacheTTL` configuration](https://nextjs.org/docs/app/api-reference/components/image#minimumcachettl) is not supported. All assets (static, local, or remote) are handled as either immutable (cache forever) or not. Except for the `immutable` attribute, it does not respect the cache behavior set by the `Cache-Control` header for non-static images.
- [`dangerouslyAllowLocalIP` configuration](https://nextjs.org/docs/app/api-reference/components/image#dangerouslyallowlocalip) is not supported. Local IP addresses are always allowed if the URL is allowed by the `remotePatterns` configuration.

### Use a custom loader

You first need to [enable Cloudflare Images](https://developers.cloudflare.com/images/get-started/#enable-transformations-on-your-zone) for your zone.

It is strongly advised to restrict the image origins that can be transformed to where your images are hosted, i.e. a [R2 bucket](https://developers.cloudflare.com/r2/buckets/).

You then need to configure your Next application to use a custom loader for Cloudflare Images.

Create an `image-loader.ts` at the root of your application:
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