SSL Certificate Checker

Check SSL certificate details and security information for any domain. Enter a domain name to get comprehensive SSL certificate information.

Checking SSL certificate...

Certificate Status

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Unknown
Issued To
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Issued By
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Certificate Details

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Valid Until
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Serial Number
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Security Information

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Key Size
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Signature Algorithm
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Understanding SSL Certificates and Security

What is an SSL Certificate?

An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection. It ensures that all data transmitted between the web server and browser remains private and secure.

Key Components of SSL Certificates

  • Domain name, server, company, or organizational identity
  • Certificate issue date and expiration date
  • Issuing Certificate Authority (CA)
  • CA's digital signature
  • Public key for encryption

Why Check SSL Certificates?

  • Verify website security and authenticity
  • Monitor certificate expiration dates
  • Ensure encryption protocols are up-to-date
  • Identify potential security vulnerabilities
  • Maintain compliance with security standards

Common SSL Certificate Issues

  • Expired certificates
  • Domain mismatch
  • Self-signed certificates
  • Weak encryption algorithms
  • Untrusted certificate authorities

Frequently Asked Questions

How often should I check my SSL certificate?

It's recommended to check your SSL certificate at least monthly and set up monitoring for expiration notifications.

What makes a good SSL certificate?

A good SSL certificate should be issued by a trusted CA, use strong encryption (at least 256-bit), and cover all necessary domains and subdomains.

Why is SSL important for SEO?

SSL certificates are a ranking factor for search engines, and websites without SSL may be marked as "not secure," affecting user trust and SEO performance.