Features

Validity Verification

Instantly confirm if your SSL certificate is valid, trusted, and correctly installed on the server.

Expiration Monitoring

View the exact expiration date and see a countdown of days remaining to prevent unexpected service interruptions.

Issuer Identification

Identify the Certificate Authority (CA) that issued the certificate and verify the organization details.

SANs Analysis

Check the Subject Alternative Names to list all other domains and subdomains covered by the certificate.

About SSL Certificate Checker

The SSL Certificate Checker is a critical diagnostic tool for webmasters and security administrators. It performs a real-time handshake with your server to retrieve and analyze the installed SSL/TLS certificate. Security warnings or expired certificates can drive visitors away and harm your SEO. This tool gives you an instant health check of your encryption. It verifies the certificate chain, calculates the exact days remaining until expiration, and displays key technical details like the Issuer (Certificate Authority) and Subject Alternative Names (SANs) so you can fix configuration issues before they impact your users.

How to Use SSL Certificate Checker

Enter Domain

Type the domain name (e.g., 'google.com') you want to secure check.

Analyze SSL

Click the 'Check a SSL' button to initiate a TLS handshake and retrieve the certificate.

Review Status

Check the main status card to see if the certificate is 'Valid' and how many days are left.

Inspect Details

Explore the technical sections for fingerprints, serial numbers, and issuer information.