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Security Tools/SSL Checker

SSL Checker

Analyze SSL/TLS certificate and connection security

Check Domain

Enter a domain name or URL to check its SSL/TLS certificate

Note

This tool performs a simulated SSL check for demonstration. In production, use server-side APIs for accurate certificate analysis.

SSL/TLS Certificate Guide

Learn about SSL certificates and secure connections

What is an SSL Certificate?

An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables encrypted connections. Modern certificates use TLS (Transport Layer Security), which is the successor to SSL. These certificates ensure that data transferred between users and websites remains private and secure.

How to Use

1. Enter a domain name (e.g., example.com) or full URL 2. Click 'Check SSL' to analyze the certificate 3. Review the grade, certificate details, and any security issues

Understanding Grades

• A/A+: Excellent security with modern protocols and strong encryption • B: Good security with minor improvements recommended • C: Acceptable security but several improvements needed • F: Critical security issues that need immediate attention

Frequently Asked Questions

What does the SSL grade mean?

The SSL grade reflects the overall security of a website's certificate and connection. Grade A+ indicates excellent security with modern TLS 1.3, strong ciphers, and proper configuration. Lower grades indicate issues like outdated protocols, weak ciphers, or certificate problems that could compromise security.

Why is my certificate showing as invalid?

A certificate may be invalid for several reasons: it has expired, is self-signed and not trusted by browsers, the domain doesn't match the certificate, or the certificate chain is incomplete. Check the specific error messages to identify and fix the issue.

What is the difference between SSL and TLS?

SSL (Secure Sockets Layer) is the predecessor to TLS (Transport Layer Security). SSL is now deprecated due to security vulnerabilities. Modern 'SSL certificates' actually use TLS protocols. TLS 1.2 and TLS 1.3 are the current secure standards, with TLS 1.3 being the most secure and fastest.

How often should I check my SSL certificate?

Check your SSL certificate regularly, especially: before certificate expiration (most certificates are valid for 1 year), after server configuration changes, when setting up new domains, and periodically as part of security audits. Set up monitoring alerts for expiration dates to avoid unexpected outages.

What is a cipher suite?

A cipher suite is a combination of encryption algorithms used to secure a connection. It includes algorithms for key exchange, bulk encryption, and message authentication. Modern cipher suites like TLS_AES_256_GCM_SHA384 provide strong security. Avoid older suites with DES, RC4, or MD5.

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