How to Install an SSL Certificate

DigiCert Customer Reviews: ★★★★★ 5 (1322)

After you create your CSR, purchase your certificate, and the SSL Certificate validation and processing are complete, you are ready to install your SSL Certificate(s).

Your certificate will be provided via email or will be available to download in your DigiCert Account. The SSL Certificate is a text file with encrypted data that your server will use once the certificate is installed.

Before you begin the installation, we recommend that you make a backup of the certificate and store it in a safe place. This makes re-securing your server much easier if your server crashes.

In addition to your SSL Certificate, you will need to download two more certificates. These are known as intermediate certificates and are required by browsers so that they know to trust your SSL Certificate. The intermediate certificates link to DigiCert’s root certificate. Registered Certificate Authorities like DigiCert must provide a known root certificate before their SSL Certificate will be trusted by SSL-enabled applications (learn more about the role of root certificates). Note that for some servers (such as Microsoft) the intermediate certificates are bundled with the SSL Certificate.

Once you have your certificate installed, we recommend that you check that everything is working correctly using our free SSL Installation Diagnostics tool. Or for an easy way to find and manage all the certificates on your network, try our free DigiCert Certificate Inspector tool.

Common Platforms & Operating Systems

NOTE: To remain secure, certificates must use keys which are at least 2048 bits in length. If your server platform can't generate a CSR with a 2048-bit key, please contact us. See this article for more information.

Get The Support You Need, When You Need It

DigiCert has an award-winning in-house technical support team that is here to help you with any digital certificate issues that you have. Our dedication to unparalleled customer support is reflected in the numerous service awards we have won. Nowhere is this better demonstrated than in the hundreds of 5-star customer reviews we have on In fact, DigiCert is the only Certificate Authority with a perfect 5-star rating!

Professional Support Available Anytime!

We try to keep our online documentation as up-to-date as possible. However, if you have a particular article or platform that you would like to see documentation for, please email us.

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4 out of 5 stars.

Very Easy

Within 20 minutes of placing our order. I got initial contact from their reps. This was my first time setting up HTTPS in a production environment and it probably could not have been easier. The only reason why I didn't give 5 stars is because choosing the correct cert type was a little confusing, but like I said this was my first time using a cert provider. Normally I generate my own certs for testing.
5 out of 5 stars.

Great Support

They are professional
Many thanks for Mr. Ben W.
5 out of 5 stars.

Some of the Best Customer Service!

DigiCert Support has always gone above and beyond to answer my questions and resolve any issues I have. I have to mention that most issues have been my fault. Overall, DigiCert is the best registrar I've used as far as issuance speed and support. I am a very happy customer.