Question 1

What is an SSL certificate?

Accepted Answer

An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables encrypted connections. It's what makes the padlock appear in your browser's address bar and ensures data between you and the site is secure.

Question 2

How do I check if an SSL certificate is valid?

Accepted Answer

Enter any domain name into the SSL Checker above and click Check. The tool will instantly connect to the server and report whether the certificate is valid, when it expires, who issued it, and the TLS protocol version in use.

Question 3

What does the SSL security grade mean?

Accepted Answer

The grade reflects the overall security of the SSL configuration: A+ means TLS 1.3 with plenty of time before expiry (best). A means TLS 1.2. B means the certificate expires in less than 30 days. C means the certificate is not trusted or uses an outdated protocol. D means the certificate expires in less than 14 days. F means the certificate has already expired.

Question 4

How often should I check my SSL certificate?

Accepted Answer

We recommend checking your SSL certificate at least once a month, and setting a renewal reminder 30 days before expiry. Use the 'Add reminder to calendar' button after each check to get an automatic alert.

Question 5

Is this SSL checker free?

Accepted Answer

Yes, completely free. No account, no signup, no limit on checks. The tool connects directly to the domain's server in real time — no data is stored.

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