An SSL certificate helps secure communication between a website and its visitors by encrypting data transmitted over the internet. Verifying a website’s SSL certificate allows you to confirm that the connection is secure and that the certificate is valid.
Table of Contents
Check for HTTPS
The easiest way to verify that a website is using SSL is to look at the address bar in your browser.
A secure website should:
- Use
https://at the beginning of the address - Display a padlock icon next to the website address
If you see a warning such as “Not Secure,” the website may not be using a valid SSL certificate.
View Certificate Details
Most modern browsers allow you to view certificate information directly from the address bar.
- Open the website in your browser.
- Click the padlock icon next to the website address.
- Select the option to view connection or certificate information.
Depending on your browser, the exact menu names may differ.
Verify the Domain Name
Check that the certificate was issued for the website you are visiting.
For example:
- Website:
example.com - Certificate issued to:
example.com
If the domain name does not match, your browser may display a security warning.
Check the Expiration Date
SSL certificates are valid only for a limited period.
Review the certificate details and verify that:
- The certificate is currently valid
- The expiration date has not passed
An expired certificate may cause browser warnings and prevent secure connections.
Verify the Certificate Issuer
Every SSL certificate is issued by a trusted Certificate Authority (CA).
Common certificate authorities include:
- Let’s Encrypt
- DigiCert
- Sectigo
- GlobalSign
A trusted issuer helps confirm the authenticity of the certificate.
Test the Certificate Online
You can also use online SSL testing tools to perform a more detailed analysis of a certificate, including:
- Certificate validity
- Supported TLS versions
- Certificate chain verification
- Security configuration issues
These tools can be useful when troubleshooting SSL-related problems on your website.
Summary
Checking an SSL certificate is an important step in verifying a website’s security. By confirming that a website uses HTTPS, reviewing certificate details, checking expiration dates, and verifying the issuing authority, you can ensure that your connection is encrypted and secure.