Custom Domain with Images

Set up custom domain for Images using a Worker or serve images using a prefix path and Cloudflare registered domain.

To serve images from a custom domain:

Log in to the Cloudflare dashboard.
Select your account > select Workers & Pages.
Select Create application > Workers > Create Worker and create your Worker.
In your Worker, select Quick edit and paste the following code.

export default {  async fetch(request) {    // You can find this in the dashboard, it should look something like this: ZWd9g1K7eljCn_KDTu_MWA    const accountHash = "";
    const { pathname } = new URL(request.url);
    // A request to something like cdn.example.com/83eb7b2-5392-4565-b69e-aff66acddd00/public    // will fetch "https://imagedelivery.net/<accountHash>/83eb7b2-5392-4565-b69e-aff66acddd00/public"
    return fetch(`https://imagedelivery.net/${accountHash}${pathname}`);  },
};

export default {  async fetch(request): Promise<Response> {    // You can find this in the dashboard, it should look something like this: ZWd9g1K7eljCn_KDTu_MWA    const accountHash = "";
    const { pathname } = new URL(request.url);
    // A request to something like cdn.example.com/83eb7b2-5392-4565-b69e-aff66acddd00/public    // will fetch "https://imagedelivery.net/<accountHash>/83eb7b2-5392-4565-b69e-aff66acddd00/public"
    return fetch(`https://imagedelivery.net/${accountHash}${pathname}`);  },
} satisfies ExportedHandler;

from js import URL, fetch
async def on_fetch(request):    # You can find this in the dashboard, it should look something like this: ZWd9g1K7eljCn_KDTu_MWA    account_hash = ""    url = URL.new(request.url)
    # A request to something like cdn.example.com/83eb7b2-5392-4565-b69e-aff66acddd00/public    # will fetch "https://imagedelivery.net/<accountHash>/83eb7b2-5392-4565-b69e-aff66acddd00/public"    return fetch(f'https://imagedelivery.net/{account_hash}{url.pathname}')

Another way you can serve images from a custom domain is by using the cdn-cgi/imagedelivery prefix path which is used as path to trigger cdn-cgi image proxy.

Below is an example showing the hostname as a Cloudflare proxied domain under the same account as the Image, followed with the prefix path and the image <ACCOUNT_HASH>, <IMAGE_ID> and <VARIANT_NAME> which can be found in the Images on the Cloudflare dashboard.

https://example.com/cdn-cgi/imagedelivery/<ACCOUNT_HASH>/<IMAGE_ID>/<VARIANT_NAME>