SSL Certificate Checker
Test SSL/TLS connectivity and review security best practices.
SSL/TLS Security Checklist
Check certificate validity
Click the padlock icon in your browser to view certificate details, issuer, and expiration date.
Verify chain of trust
Certificate must be signed by a trusted CA (Let's Encrypt, DigiCert, GlobalSign, etc.).
Use TLS 1.2+ only
Disable TLS 1.0 and 1.1. TLS 1.3 is recommended for best security and performance.
Enable HSTS
Add Strict-Transport-Security header to force HTTPS connections for all visitors.
Modern cipher suites
Use AES-256-GCM or ChaCha20-Poly1305. Avoid RC4, DES, 3DES, and weak ciphers.
Auto-renewal
Use Let's Encrypt with certbot auto-renewal to prevent certificate expiration.
How to Use SSL Certificate Checker
- Enter the domain, IP address, or URL you want to analyze
- Click the lookup or check button
- Review the detailed results and analysis
- Use the information to diagnose or configure your network
Why Use SSL Certificate Checker?
Network diagnostics shouldn't require expensive software or command-line expertise. Our network tools provide DNS lookups, IP geolocation, HTTP header analysis, and connectivity testing directly in your browser. Results are presented in clear, human-readable format with explanations of what each record or header means. These tools are essential for troubleshooting DNS propagation, verifying SSL configurations, checking security headers, and diagnosing connectivity issues. All queries are made in real-time from your browser, giving you accurate results from your actual network location.
- Real-time network information and diagnostics
- Detailed analysis of DNS records, headers, and IP data
- Essential for troubleshooting network issues
- Free alternative to paid network analysis tools
Frequently Asked Questions
Does this check my own IP?
Yes. The tool automatically detects and displays your current IP information.
Is the lookup data accurate?
Results are based on publicly available DNS and IP databases and are generally very accurate.
Can I check any domain?
Yes. Enter any domain name or IP address to get detailed network information.