How to Install an SSL Certificate

DigiCert Customer Reviews: ★★★★★ 4.9 (1750)

An SSL Certificate is a text file with encrypted data that you install on your server so that you can secure/encrypt sensitive communications between your site and your customers.

After you create a CSR (certificate signing request) and purchase a certificate, our Validation team validates and processes your certificate request. Once validated, we issue your SSL Certificate and send it to you via email. You can also download your SSL Certificate in your DigiCert account.

After you’ve installed your SSL Certificate, we recommend that you make a backup copy of the certificate and store it in a secure place. If a server crashes or needs to be replaced, it is much easier to secure the replacement server.

When downloading your SSL Certificate from your account, you will need to download an intermediate certificate. Browsers require the intermediate certificate to complete the certificate trust chain. The intermediate certificate links your SSL Certificate to DigiCert’s root certificate. Registered Certificate Authorities such as DigiCert must provide a known root certificate before their SSL Certificate can be trusted by SSL-enabled applications (learn more about the role of intermediate and 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. Alternatively, 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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1-3 of 1750 reviews Sort by
4 out of 5 stars.

Good service, had to push a bit

The service was good and I got my answers but had to push a bit.
Basically part of the problem was that you guys issued a blank certificate and I couldn't understand why.

So i asked the representative what happened and the answer I got was that someone in my company who had access had to have uploaded a CSR file, otherwise it wouldn't have impossible for the certificate to be generated.

I told him that no one did and at that point I was concerned that we got hacked. If he could verify who requested the certificate, when and from what IP. I had a bit of pushback, but then the representative escalated and figured it out.

4 out of 5 stars.

Great product and customer service!

The techs at Digicert really made it easy to install the EV SSL I purchased. Their follow through and continued support via the online chat app was excellent. Email response time was also quick.
5 out of 5 stars.

Fantastic service, and support!

DigiCert team needs a reward for best support!