Free SSL Certificate Checker

Check your website's SSL/TLS certificate expiration, validity, and security grade in seconds. No signup required.

Enter a domain like "example.com" or "subdomain.example.com"

Checking SSL certificate...

Instant Results

Get your SSL certificate status in seconds

No Signup Required

Check any domain for free, no account needed

Security Grade

See your certificate's security rating A-F

How to Use This SSL Checker

What does this tool check?

Our free SSL checker analyzes your website's SSL/TLS certificate and provides:

  • Certificate expiration date and days remaining
  • Certificate issuer and validity status
  • Security grade (A-F) based on best practices
  • TLS version and certificate fingerprint
  • Warnings for expired or soon-to-expire certificates

Why check your SSL certificate?

Expired SSL certificates cause browser warnings that drive visitors away, hurt your SEO rankings, and expose sensitive data. Regular checking helps you renew certificates before they expire, preventing downtime and security issues.

How often should I check?

Manual checking is tedious and easy to forget. That's why we built SSLGuard - automatic SSL monitoring with email, Slack, and webhook alerts. Sign up free to monitor up to 3 domains automatically.

Never Miss a Certificate Expiration Again

Get automatic alerts before your certificates expire. Free plan includes 3 domains.

Start Free Monitoring