If you have an SSL file in your server, don’t know how to see it will expire? No need to use a third party website to check your SSL expiration
You can use OpenSSL for all kinds of purposes around SSL Certificates, such as how to create your own certificate, private key, csr, and see your SSL expiration.
Check SSL certificate expiration date from OpenSSL
Set directory to /bin, for example: my openssl bin directory is in “C:\Program Files\OpenSSL-Win64\bin” Then enter the command “cd C:\Program Files\OpenSSL-Win64\bin”
2. Prepare your SSL certificate file in bin directory (certificate.crt), it is needed to see the expiry date using the Command
Enter the following command to see the expiry date of your certificate
openssl x509 -in certificate.crt -text -noout
Now we know when the ssl certificate will be expired
Check SSL certificate expiration date without OpenSSL
Actually there is another way to see the expiry of your ssl certificate, that is by opening the crt file itself … Here we go!
You will see in the valid from section, that is your SSL certificate expiration.
But in order to get more valid information, it’s better to use Open-SSL Command, it’s not that hard to do it, right?
Video Tutorial How to Check SSL Certificate Expiration with OpenSSL
The above steps are very important to see the quality of your SSL certificate, because we need to know when to replace it with a new certificate.
I hope this gave you an idea of how to view certificate expiry date with Open-SSL.
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