SSL Checker Agent

SSL Checker – Verify SSL Certificate Validity, Expiry & Security

The SSL Checker Tool helps you quickly diagnose SSL/TLS certificate issues on any website. By entering a domain name, you can instantly check whether the SSL certificate is valid, trusted, correctly installed, and secure for all users.

This tool is essential for website owners, developers, system administrators, SEO professionals, and cybersecurity teams who want to ensure secure HTTPS connections and avoid browser security warnings.

What is an SSL Checker?

An SSL Checker inspects a website’s SSL/TLS certificate and verifies critical details such as:

• Certificate validity
• Trusted certificate authority (CA)
• Expiration date
• Domain name matching (CN & SAN)
• Supported TLS versions
• Cipher suites
• Security vulnerabilities

It helps identify configuration errors that can cause browsers to show warnings like “Your connection is not secure”.

What Does the SSL Checker Analyze?

The tool provides a detailed SSL/TLS report including:

• 🔐 Certificate Status (Valid / Invalid / Expired)
• 🏷️ Issued To (Common Name & SANs)
• 🏢 Issued By (Certificate Authority)
• ⏳ Expiry Date & Days Remaining
• 🔄 TLS / SSL Protocol Support
• 🔑 Cipher Algorithms
• ⚠️ Known Vulnerabilities
  (BEAST, POODLE, Heartbleed, ROBOT, Ticketbleed, etc.)
• 🧾 Server Security Headers

Why Use an SSL Checker?

Using an SSL Checker helps you:

• Prevent HTTPS browser warnings
• Maintain user trust and security
• Improve SEO (HTTPS is a ranking factor)
• Ensure PCI-DSS & compliance readiness
• Detect expired or misconfigured certificates
• Identify weak ciphers and protocols
• Validate SSL installation after setup or renewal

Key Features

• ⚡ Instant SSL certificate validation
• 🔍 Detects configuration and trust issues
• 📅 Expiry & remaining days calculator
• 🛡️ TLS protocol & cipher analysis
• 🚨 Vulnerability scanning
• 🌍 Works with any public domain
• 🔓 No login or registration required
• 💻 Browser-based & easy to use

How to Use the SSL Checker

1. Enter your website hostname
    (Example: www.example.com — without https://)
2. Keep port as 443 (default HTTPS)
3. Click Check SSL
4. View the full SSL/TLS report instantly
5. Fix any detected issues if shown

Common Use Cases

Website Owners

Ensure SSL certificates are valid and won’t expire unexpectedly.

Developers & SysAdmins

Debug SSL installation, chain issues, or protocol mismatches.

SEO Professionals

Confirm HTTPS security for better rankings and user trust.

Cybersecurity Teams

Scan for weak ciphers and known SSL/TLS vulnerabilities.

Hosting & Support Teams

Quickly troubleshoot customer SSL-related issues.

What is SSL & Why It Matters?

SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) encrypt communication between a browser and a server. This ensures that sensitive data such as passwords, personal information, and payment details cannot be intercepted.

A valid SSL certificate enables:

• 🔒 Secure HTTPS connections
• ✅ Browser trust indicators (lock icon)
• 📈 Better SEO performance
• 🛡️ Protection against man-in-the-middle attacks

Example Check Result

Certificate Status: Valid
Issued To: www.example.com
Issued By: Trusted CA
Expires In: 142 days
TLS Versions: TLS 1.2, TLS 1.3
Vulnerabilities: None detected