SSL Certificate Check

Q: What is an SSL certificate?

An SSL certificate enables HTTPS connection encryption between the user and the web server.

Q: How do you check whether an SSL certificate is valid?

Simply enter the domain in the SSL checker tool to see the expiry date and certificate details.

Q: What happens when an SSL certificate expires?

Browsers will display an insecure site warning, which may deter users.

SSL certificate check – how to verify website security

An SSL certificate (Secure Sockets Layer) provides encryption of the connection between the user's browser and the web server. This ensures that data such as passwords, form submissions and payment details are protected from interception by third parties.

The SSL certificate checker lets you quickly verify the validity of a certificate, its expiry date, issuer (CA) and TLS configuration. This is useful for website administrators, developers and website owners.

Regularly checking the SSL certificate helps avoid security issues and browser warnings. An expired certificate can cause users to see an insecure site warning, which negatively affects trust and SEO.

Frequently Asked Questions (FAQ)

What is an SSL certificate?

An SSL certificate is a digital certificate that enables HTTPS connection encryption between the user's browser and the server. It ensures the security of transmitted data and confirms the identity of the website.

How do you check whether an SSL certificate is valid?

Simply enter the domain name in the SSL checker tool. The system will check the TLS certificate, its expiry date, issuer and basic security configuration information.

What happens when an SSL certificate expires?

After the certificate expires, web browsers will display an insecure site warning. This can deter users from visiting the site and negatively affect trust and conversions.

Does SSL affect Google rankings?

Yes. Google treats HTTPS as an SEO ranking factor. Sites using SSL certificates are considered more secure and may achieve better positions in search results.

How does SSL certificate checking work?

The tool connects to the HTTPS server of the selected domain and retrieves information about the TLS certificate. It then analyzes data such as the expiry date, certificate issuer (Certificate Authority), encryption algorithm and certificate chain. This allows you to quickly check whether the SSL configuration is correct and secure.

Why should you check the SSL certificate?

The SSL/TLS certificate is responsible for encrypting the connection between the user's browser and the web server. Thanks to it, transmitted data — such as passwords, forms and payment information — is protected from interception by third parties.

Regularly checking the SSL certificate ensures that it is correctly configured, issued by a trusted certificate authority and has not expired. Certificate issues can cause browser warnings, security errors and a loss of user trust.

Checking the expiry date

You can check when the SSL certificate expires and whether it needs to be renewed.

Certificate issuer information

You will find out which organization (CA) issued the certificate and whether it is trusted by browsers.

Supported TLS protocols

Checking the TLS version allows you to detect outdated server configurations.

Certificate chain

You can verify whether the full certificate chain is correctly configured.