SSL Certificate Checker

Check the SSL certificate of a website with the WaooTools SSL Certificate Checker. Enter a domain name to review available certificate details, including the certificate issuer, validity period, expiry date, and domain information.

An SSL certificate check helps website owners, developers, and security teams identify certificate issues that may affect HTTPS connections and visitor trust.

How to Use the SSL Certificate Checker

1. Enter the website domain or URL.
2. Start the SSL certificate check.
3. Wait while the tool retrieves the available certificate information.
4. Review the certificate details and validity status.
5. Check the expiry date and certificate coverage for potential issues.

What Is an SSL Certificate Checker?

An SSL Certificate Checker is an online tool that examines the SSL/TLS certificate presented by a website. It helps identify whether the certificate is valid, when it expires, who issued it, and which domain names it covers.

SSL certificates are used to establish encrypted HTTPS connections between a website and a visitor’s browser.

What Does the SSL Certificate Checker Check?

The tool can display available information such as:

• SSL Certificate Status – Shows the available certificate validity result.
• Certificate Issuer – Identifies the certificate authority that issued the certificate.
• Issue Date – Shows when the certificate became valid.
• Expiry Date – Shows when the certificate is scheduled to expire.
• Domain Coverage – Displays the domain names covered by the certificate.
• Certificate Subject – Shows the domain or entity associated with the certificate.
• Certificate Details – Provides available technical information about the SSL/TLS certificate.
• HTTPS Certificate Information – Helps review the certificate used by the website’s secure connection.

Why Check an SSL Certificate?

An expired, incorrectly configured, or mismatched certificate can cause browser warnings and prevent visitors from accessing a website securely.

Regular SSL certificate checks can help you:

• Identify certificates approaching their expiry date
• Review certificate coverage for a domain
• Investigate HTTPS certificate warnings
• Check certificate issuer information
• Support website maintenance and security monitoring
• Confirm that a website presents an SSL/TLS certificate

What Is an SSL Certificate?

An SSL certificate is a digital certificate used to support encrypted communication between a website and a visitor’s browser.

Although the term SSL is commonly used, modern websites generally use TLS, the successor to SSL. When a website has a valid certificate and HTTPS is configured correctly, browsers can establish a secure connection and display the HTTPS indicator.

SSL Certificate vs HTTPS

An SSL/TLS certificate is part of the security system used by HTTPS.

• SSL/TLS Certificate: Helps authenticate the website and supports encrypted communication.
• HTTPS: The secure version of HTTP that uses TLS to protect data transferred between the browser and website.

A certificate alone does not guarantee that every part of a website is secure. The website must also be correctly configured and maintained.

Important Limitations

• Results depend on the certificate information available from the submitted domain.
• A certificate check does not perform a complete website security audit.
• A valid certificate does not guarantee that a website is free from malware, vulnerabilities, or unsafe content.
• Certificate details may change after renewal, replacement, or server configuration updates.
• Some domains may use different certificates for different subdomains, servers, or network configurations.
• The checker may not identify every HTTPS, server, or application-level security issue.