Check any website’s SSL certificate details in seconds. Instantly view issuer, expiration date, certificate chain, domain validity, and security status. Perfect for webmasters, developers, security professionals, and SEO analysts.
The Free SSL Certificate Checker helps you verify the SSL certificate status of any domain in real time. It’s a must-have tool for website owners, developers, IT administrators, and security analysts who want to ensure their domains are secured with valid SSL certificates. SSL (Secure Sockets Layer) encrypts the connection between a user's browser and the server, helping to protect data and build user trust.
To begin using this tool, simply enter the domain name in the input box provided — for example: example.com. Make sure to omit http:// or https:// as the tool only needs the domain name. Once entered, click the Check SSL button to initiate the lookup process. The tool will connect to a trusted SSL API to fetch the live certificate details of the given domain.
The results include:
A visual progress bar displays the percentage of time elapsed between the start and end of the certificate’s validity period. Additionally, you can view the entire Certificate Chain to ensure that all intermediate and root certificates are in place.
If an invalid certificate is detected, the tool clearly displays an error message for quick diagnosis. This is particularly useful for preventing unexpected SSL errors or browser warnings.
For more information on how this tool works, and why SSL health is vital for your website, check out our guide at blogs.freetoolsmax.com/ssl-certificate-checker.
Whether you manage a single website or multiple domains, the Free SSL Certificate Checker offers a simple and effective way to stay ahead of SSL expirations and potential security risks.
Verify whether a website has a valid SSL/TLS certificate and is secure over HTTPS.
Find out when an SSL certificate expires and avoid unexpected website downtime or warnings.
View issuing certificate authority (CA), signature algorithm, and public key info.
Display the full certificate chain from the root CA to the leaf certificate for transparency and trust validation.
Check whether the certificate matches the domain name, including wildcard and SAN (Subject Alternative Names) support.
Get alerted to insecure or misconfigured certificates such as self-signed or expired certs.
Check SSL as part of technical SEO or website security analysis.
Use the SSL checker instantly — no registration, unlimited free checks.