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SSL/TLS Certificate Check Tool

The SSL/TLS Certificate Check Tool comprehensively analyzes certificate configurations on live servers, detecting potential security issues, protocol support, and vulnerabilities to help ensure your server’s security.

Access the Tool

Section titled “Access the Tool”

Visit the SSL/TLS Certificate Check Tool page.

Usage

Section titled “Usage”

Single Host Check

Section titled “Single Host Check”

  1. Enter Host Address

    Enter the host address to check in the input field, format:

    • example.com (uses port 443 by default)
    • example.com:8443 (specify port)
    • 192.168.1.100:443 (IP address)

  2. Start Check

    Click the “Start Check” button, and the system will begin analyzing the target host’s SSL/TLS configuration

  3. View Results

    After the check completes, detailed analysis results will be displayed

Batch Check

Section titled “Batch Check”

Support checking multiple hosts at once for improved efficiency.

  1. Enter Multiple Hosts

    Enter one host address per line:

    example.com
    api.example.com:8443
    www.example.com

  2. Configure Concurrency

    Set the number of hosts to check simultaneously (recommended: 3-5)

  3. Start Batch Check

    The system will check all hosts sequentially and display real-time progress

Understanding Results

Section titled “Understanding Results”

Overall Grade

Section titled “Overall Grade”

The tool provides a comprehensive grade from A+ to F:

  • A+/A: Excellent, comprehensive security configuration
  • B: Good, minor room for improvement
  • C: Acceptable, some security issues exist
  • D/E/F: Poor, serious security concerns

Certificate Information

Section titled “Certificate Information”

Displays detailed certificate information including validity period, issuer, subject names, and certificate chain verification status.

Protocol Support

Section titled “Protocol Support”

Checks TLS/SSL protocol versions supported by the server:

Recommended Configuration:

  • ✅ TLS 1.3 (Latest, most secure)
  • ✅ TLS 1.2 (Widely compatible)
  • ⚠️ TLS 1.1 (Deprecated, not recommended)
  • ❌ TLS 1.0 (Obsolete, security issues)
  • ❌ SSL 3.0, SSL 2.0 (Critical vulnerabilities, must disable)

Vulnerability Detection

Section titled “Vulnerability Detection”

Automatically detects common SSL/TLS vulnerabilities including POODLE, BEAST, Heartbleed, FREAK, Logjam, DROWN, and ROBOT.

Certificate Transparency (CT)

Section titled “Certificate Transparency (CT)”

Checks if the certificate is recorded in Certificate Transparency logs for browser trust compliance.

Check History

Section titled “Check History”

The tool saves your check history for comparison and tracking. History is retained for 90 days.

Sharing and Export

Section titled “Sharing and Export”

Generate share links or download results as PDF/JSON for team collaboration and reporting.

Best Practices

Section titled “Best Practices”

Recommended server configuration based on check results includes proper protocol configuration, cipher suite selection, HSTS setup, and complete certificate chain configuration.

FAQ

Section titled “FAQ”

Why isn’t my grade A+?

Section titled “Why isn’t my grade A+?”

Possible reasons: TLS 1.3 not enabled, insecure old protocols supported, HSTS not configured, or suboptimal cipher suite configuration.

Does checking affect server performance?

Section titled “Does checking affect server performance?”

No. The tool only establishes SSL/TLS handshake connections for detection without sending actual business requests, with minimal server impact.