Free Tool

SSL Certificate Checker

Deep-dive into any domain's SSL/TLS configuration. Analyze certificates, protocol support, cipher suites, and security best practices.

Passive, non-intrusive checks only. No data stored.

15+Checks

5Categories

<10sScan Time

3/dayFree Scans

Daily Limit Reached

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SSL is just the beginning

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The Lory AI Pentester runs autonomous AI penetration testing of your in-scope assets, with AI-powered vulnerability analysis and automated alerting.

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What We Check

Comprehensive SSL/TLS Analysis

Our checker examines every aspect of your domain's SSL/TLS configuration.

Certificate Details

Subject, issuer, validity dates, expiration, serial number, and SANs.

Chain Validation

Complete certificate chain verification from leaf to root CA.

Protocol Support

TLS 1.2/1.3 support and legacy protocol detection.

Key Strength

Key type, size, and signature algorithm analysis.

Transparency

Certificate Transparency and SCT presence checks.

Best Practices

HSTS, HTTPS redirect, hostname matching, OCSP stapling.

How It Works

Check in 3 Simple Steps

Get a detailed SSL/TLS analysis in seconds.

Enter Your Domain

Type in any domain - we'll retrieve the SSL certificate automatically.

We Analyze

15+ checks across 5 categories including protocols, chain, and best practices.

Get Your Report

Detailed breakdown with score, findings, and recommendations.

Frequently Asked Questions

What is an SSL/TLS certificate?

An SSL/TLS certificate authenticates a website's identity and enables encrypted HTTPS connections. It contains the public key, domain, issuing CA, and expiration date.

Why should I check my SSL certificate?

Expired or misconfigured certificates cause browser warnings, weaken encryption, and hurt SEO. Regular checks ensure validity and security compliance.

TLS 1.2 vs TLS 1.3?

TLS 1.3 offers faster handshakes, stronger ciphers, and removes legacy algorithms. TLS 1.2 is still secure, but 1.3 is recommended. TLS 1.0/1.1 are deprecated.

What does the security score mean?

Score 0-100 based on certificate validity, protocol support, key strength, chain validation, and best practices. 80+ is good, 50-79 needs work, below 50 has issues.

Is this tool really free?

Yes, completely free with no sign-up. 3 checks per day. For autonomous AI penetration testing of your in-scope assets, check out the Lory AI Pentester.

Stop Guessing. Start Testing.

A valid certificate doesn't mean your application is secure. The Lory AI Pentester runs autonomous AI penetration testing of your in-scope assets.

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