SSL Certificate Checker

ℹ️ About SSL Certificate Checker

This tool allows you to inspect the SSL certificate validity of any HTTPS website. Audit the certificate authority, active dates, remaining expiry days, and HTTP security headers to evaluate server configuration.

Features

Why Use Our SSL Checker?

Perform real-time audits to verify certificate chains and assess configuration risks.

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Real-Time Validation

Audit SSL certificates dynamically from active website socket streams.

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Security Rating

Get an instant security grade based on headers configuration and cert validity.

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Tabbed History Panel

Track multiple target domains and swap between results tabs without re-querying.

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Security Headers Audit

Check crucial response headers like CSP and HSTS for website protection.

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Industry Standard Compliance

Verifies certificate matches modern secure TLS protocol standards.

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Detailed Expiry Alerts

Prevents server outages by tracking remaining expiry days.

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FAQ

Frequently Asked Questions

Find quick answers to common questions regarding SSL certificates and website security configuration.

An SSL certificate secures connection pathways between client browsers and server nodes by encrypting transit packets.

Security headers shield websites from common vulnerabilities like Cross-Site Scripting (XSS), Clickjacking, and cookie injection vectors.

The security grade is calculated by checking the presence of mandatory HTTP security headers (HSTS, CSP, X-Frame-Options) and verifying if the SSL certificate has more than 30 days remaining before expiration.

Generally, commercial certificates are valid for one year, while automated certificates (like Let's Encrypt) expire every 90 days.

TLS is the modern, secure successor of SSL. While the term SSL is still widely used, modern HTTPS sites use TLS.