Digicert has an online tool which checks whether you have any issues with the installed certificate. The good thing is that it can be done from anywhere, as it is web based. All you need to do is put your server IP or name and the tool will do the rest. It provides useful information such as the validity, certificate issuer, signature algorithm, key size etc.
The tool works for any SSL certificate (not locked to Digicert ones), which is really good.
Run the tool from here
Check out my previous article to know more about DigiCertUtil, another tool from Digicert.
A sample output is shown below.
