# Origin URL prefix

To make your Cloudimage URLs shorter and improve SEO, you can configure an *origin prefix*. For example, if your images are stored at the URL `https://hello.s3.aws.com/`, you can set up prefix URL:

<figure><img src="https://727245914-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDIcmPiz7q6Sr6ZHHQxV%2Fuploads%2FfvBPFPqkNSF56iCeSkg3%2Forigin%20prefix.png?alt=media&#x26;token=5f1517a6-6f26-449b-b2af-e4b5a59b0d04" alt=""><figcaption></figcaption></figure>

When you use:

//<mark style="color:blue;">**token**</mark>.cloudimg.io/<mark style="color:red;">**photos/paris.jpg**</mark>?<mark style="color:orange;">**width=800**</mark>

Cloudimage will search the origin image at the URL:

<mark style="color:red;">**//hello.s3.aws.com/photos/paris.jpg**</mark>

By using the origin prefix, you can avoid exposing the URL of your media to users.

The *Origin URL prefix* will apply to all Cloudimage transformations for your token. Make sure that all your origin images are served from the *Origin URL prefix* domain. Should you have multiple source domains, then please use [aliases](https://docs.cloudimage.io/go/cloudimage-documentation-v7/en/domains-urls/aliases) instead.

{% hint style="info" %}
The Origin prefix will interfere with your Cloudimage Library stored assets. In order to use this feature in conjunction with the Cloudimage Library, please contact our support.
{% endhint %}

{% hint style="info" %}
If your origin server needs authentication, please refer to the [connecting-storage-bucket](https://docs.cloudimage.io/setup/connecting-storage-bucket "mention") section.
{% endhint %}