How to check SSL validity?

Enter domain. Shows validity period, issuer, expiration, security rating. Must not be expired.

At least 30 days before expiration. Most valid 1 year. Set reminders at 60, 30, 7 days.

What is SSL certificate chain?

Hierarchy from domain cert to trusted root CA. Complete chain ensures browser verification.

Use TLS 1.2 or 1.3. TLS 1.0/1.1 deprecated. TLS 1.3 best security/performance.

Offline SSL Certificate Checker Expiration & Validity Tool 2026

Enter a hostname to analyze its SSL/TLS configuration.

google.com

Valid 58 Days Left

Issued by: GTS CA 1C3

Signature: SHA256withRSA

Expires

2023-12-31

Protocol Support

Vulnerability Scan

What is SSL/TLS?

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that secure communication between web browsers and servers. They encrypt data in transit, preventing eavesdropping and tampering. SSL certificates also verify website identity, building trust with visitors.

Why SSL Matters

Encryption: Protects sensitive data like passwords and credit cards
Authentication: Verifies you're connecting to the real website
Trust: Shows the padlock icon and HTTPS in browsers
SEO: Google uses HTTPS as a ranking signal
Compliance: Required for PCI DSS and other standards

SSL Certificate Types

Domain Validated (DV): Basic validation, issued quickly
Organization Validated (OV): Validates organization identity
Extended Validation (EV): Highest validation, shows company name

Frequently Asked Questions

How do I check if my SSL certificate is valid?

Enter your domain name in our SSL checker. It will show the certificate's validity period, issuer, expiration date, and security rating. A valid certificate should not be expired and should be issued by a trusted Certificate Authority.

When should I renew my SSL certificate?

Renew your SSL certificate at least 30 days before expiration. Most certificates are valid for 1 year. Setting up expiration reminders at 60, 30, and 7 days helps prevent accidental expiration.

What is an SSL certificate chain?

An SSL certificate chain is a hierarchy of certificates from your domain certificate up to a trusted root Certificate Authority. A complete chain ensures browsers can verify your certificate's authenticity.

What TLS version should I use?

Use TLS 1.2 or TLS 1.3. TLS 1.0 and 1.1 are deprecated and insecure. Modern browsers require TLS 1.2 minimum. TLS 1.3 offers the best security and performance.