SSL Certificate Checker

Verify SSL/TLS certificates, check expiration dates & analyze security features for any website

Security Score Expiry Check Chain Validation 100% Free
Enter the full URL including https:// (e.g., https://example.com)

Analyzing SSL certificate...

Security Rating: -

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Certificate Overview
Security Features
Subject Information
Issuer Information
Certificate Extensions

How to Use This SSL Certificate Checker

Ensure your website is secure and trusted. Follow these simple steps:

  1. Enter URL - Type the complete website address (e.g., https://example.com).
  2. Check Certificate - Click the button to start the analysis.
  3. Review Score - See your security rating (A-F) and summary instantly.
  4. Deep Dive - Explore "Certificate Details" and "Certificate Chain" tabs for technical specifics.
  5. Fix Issues - Use the insights to resolve validity, chain, or configuration problems.
Tip: Regular checks help prevent unexpected expirations that can scare away visitors with browser warnings.

Common Use Cases

Essential for developers, administrators, and business owners:

Expiration Monitoring

Avoid downtime by checking when your SSL certificate expires. Plan renewals well in advance.

Installation Verification

Confirm that your new certificate is installed correctly and the entire trust chain is valid.

Chain Debugging

Identify missing intermediate certificates that cause connection errors on some devices/browsers.

Security Auditing

Analyze key strength and algorithms to ensuring compliance with modern security standards.

Frequently Asked Questions

An SSL/TLS certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. These certificates are essential for securing data transmitted between a user's browser and a web server. When a website has a valid SSL certificate, the connection is encrypted, and users see a padlock icon in their browser's address bar.

Checking SSL certificates is critical for security (ensuring encryption), trust (browser verification), preventing downtime (catching expirations early), compliance (meeting industry data standards), and SEO (HTTPS is a ranking factor).

Domain Validation (DV): Verifies domain ownership only. Fast & basic.
Organization Validation (OV): Verifies domain and organization details. Higher trust.
Extended Validation (EV): Highest level of verification. Maximum trust.
Wildcard: Secures domain and all subdomains.
Multi-Domain (SAN): Secures multiple different domains.

Contact your Certificate Authority or hosting provider to renew it. You may need to generate a new CSR. Install the new certificate *before* the old one expires to ensure uninterrupted service. Always verify the new installation with this tool.

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About SSL Certificate Checker

A free, professional-grade security analysis tool.

Our SSL Certificate Checker offers deep insights into your website's security posture. From basic validity checks to advanced cryptographic analysis and chain verification, we provide the data you need to ensure your users' connection is safe. Whether you are a system administrator, a developer, or a site owner, this tool helps you maintain trust and compliance.