SSL Certificate Checker – Security Audit
Check SSL certificate validity, expiration date, and security grade. Verify HTTPS configuration and certificate chain.
Our SSL Certificate Checker inspects SSL/TLS certificates for any domain. Enter a domain to see certificate validity, issuer, expiry date, subject alternative names (SANs), and SHA-256 fingerprint.
Essential for verifying HTTPS configuration, spotting expired certs, and ensuring secure connections. Useful for developers, sysadmins, and security audits.
Features
- Check SSL certificates
- Valid/expired status
- Issuer, subject, expiry
- SANs and fingerprint
- Free with no limits
How to Use
Enter the domain name (e.g., example.com) without https://.
Click Check Certificate.
Review validity, issuer, expiry, and SANs.
Renew before expiry. Green = valid, red = expired.
Frequently Asked Questions
What is an SSL certificate?
An SSL certificate enables HTTPS. It proves the server identity and encrypts data between browser and server.
Why did the check fail?
The domain may have no cert, invalid cert, or network/CORS restrictions. Try from another network.
Is the check private?
Checking requires connecting to the domain's server to fetch the cert. No credentials are sent.