Crt.sh is a free website to find all SSL, TLS certificates of a specific domain. Here think of it like a search engine for domains to find their SSL and TLS certificates. It shows all the certificates assigned to a domain and its subdomain for free. It is kind of open source as well. If you want to inspect certificates of a domain or subdomain, then this will help you.
It shows you certificates of the wildcard domains, and more. For each domain, you specify here, it shows details like certificate issuer, logged in date, matching identities, logged at, and of source the ID. You can give it any domain, and, in a few seconds, it will show all the information about its SSL certificates.
How to Find all SSL, TLS certificates of a Specific Domain?
There is no sign up or registration required to use this website. You can just use this link to reach the main homepage. The main interface is very simple as there is just a single text box. In this box, you need to enter the domain name.
Now, you hit enter and it will now show you all the information about the domains. It will display a table of results where you can see the issued certificates to the specified domain. Scroll down a little further and you will notice that it also lists subdomains for the primary domain that you have entered here.
To see more details about a specific entry in the result, just click on its ID. It will take you to the next page where you can see timestamps, log URLs, revocation date, and status of the certificate. In addition to that, here it will also show you version of the certificate, public key algorithm used, and more.
In this way, you can make use of this simple and powerful website to find all SSL and TLS certificates for any domain or subdomain for that matter. This website works in a pretty straightforward manner. You can use it to uncover any domain and see the status of the HTTPS certificates.
Closing thoughts:
If you are doing some research on some domains then this website, Crt.sh can be of some really good use. I liked the fact that it can find the SSL certificates even for subdomains of a certain domain. It also shows all the technical and important information about those certificates. So, in case you are looking for an SSL certificates explorer tool for a domain then you are at the right place.
