SSL Certificate Checker
Verify SSL/TLS configuration, access external analyzers, and learn best practices for securing your website.
Enter a domain without protocol (e.g., example.com, not https://example.com)
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Everything you need to know
Why SSL Certificates Matter
SSL/TLS certificates are the foundation of web security. They encrypt the connection between your visitors' browsers and your web server, protecting sensitive data like login credentials, payment information, and personal details from interception. Beyond security, SSL certificates are also a Google ranking factor — sites with HTTPS get a boost in search results.
How This Tool Works
Enter your domain name and instantly generate links to the most trusted SSL analysis services online. Each service provides different insights: SSL Labs gives a comprehensive letter grade and detailed configuration analysis, SSL Shopper validates your certificate chain, and SecurityHeaders.com analyzes your HTTP security headers beyond just SSL.
SSL Best Practices Checklist
Use our built-in checklist to verify your SSL configuration follows industry best practices. This includes using TLS 1.2 or higher, enabling HSTS headers, configuring strong cipher suites, installing the complete certificate chain, and setting up automatic renewal. Each item includes a detailed explanation to help you understand why it matters.
Troubleshooting Common SSL Errors
SSL errors can be frustrating, but they usually have straightforward fixes. Our error reference covers the most common issues including certificate name mismatches (ERR_CERT_COMMON_NAME_INVALID), expired certificates, untrusted certificate authorities, and mixed content warnings. Each error includes its cause and recommended solution.
Related Security Tools
Strengthen your website security with our CSP Header Generator to prevent XSS attacks, the SRI Hash Generator to protect external resources, and the Encryption Tool for secure text encryption.