Downloading the SSL (Public Key) and Intermediate Certificates

For User-Managed SSL Certificates

Learn how to download an SSL certificate - and, if required, the intermediate certificate - as a .cert file.

The SSL certificate contains the digital signature and the public key and is required for setting up SSL encryption on the server.


This applies to the following:
  • The certificate was set up in the Domain Center

Please note: In web hosting packages, this feature is not available and not required, as the certificate is automatically installed on the web space.

To download your SSL certificate (and optionally the intermediate certificate):


Step 1

Log in to 1&1 IONOS and select the relevant contract.

Step 2

In the Domains pane, click Manage SSL Certificates.

The Domain Center opens and the SSL Certificates tab is displayed.

Step 3

Click on the domain for which you want to download the certificate.

The certificate settings are displayed.


Step 4

In the Advanced SSL Certificate Settings area, click Download.

You will receive a text file with the extension .cer, which you can save on your computer.

Step 5

Optional: If it requires installation on your server, you can also download the intermediate certificate here.

Please note: Your personal private key. For security reasons, this is not stored in the domain or 1&1 IONOS. If you are no longer in possession of your Private Key, you must have the certificate reissued via your Domain Center! This will give you a new private key.