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SSL Certificate Checker
Check SSL certificate details and expiry
SSL Certificate Checker
🎯 Related Keywords
ssl checkerssl certificate checkhttps certificatetls certificatessl expirycertificate validator
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❓ Frequently Asked Questions
Everything you need to know about SSL Certificate Checker
What is SSL certificate?+
SSL/TLS certificate enables HTTPS. Encrypts traffic between browser and server. Required for security, SEO, and modern browsers. Free certificates available via Let's Encrypt.
How to check SSL certificate?+
Enter HTTPS URL, click Check SSL. Tool shows: issuer, expiry date, validity period, fingerprint. Most important: days until expiry.
Why check SSL expiry?+
Expired certificates show big browser warnings, kill traffic. Auto-renew often fails silently. Check monthly to ensure renewal works.
What's the difference between SSL and TLS?+
SSL is older protocol (deprecated). TLS is current standard (TLS 1.2, 1.3). "SSL certificate" is common name but technically TLS now.
Free vs paid SSL - is there a difference?+
Encryption is identical. Paid certificates offer: warranty, EV (green bar), wildcard domains. For most sites, free Let's Encrypt is perfect.
How long do SSL certificates last?+
Let's Encrypt: 90 days (auto-renew). Paid: typically 1 year. Industry trend toward shorter expiry for security.
What if certificate is about to expire?+
Renew immediately! For Let's Encrypt: certbot renew. For paid: contact provider. After expiry, browsers block site = lost traffic.
What is certificate issuer?+
The Certificate Authority (CA) that issued it. Common: Let's Encrypt, DigiCert, Sectigo, GoDaddy. CA must be browser-trusted.
Can SSL be revoked?+
Yes, CAs can revoke for security reasons (private key leaked). Browsers check revocation lists. If revoked, certificate becomes invalid immediately.
Why does my SSL check fail?+
Common issues: site only on HTTP (no SSL), self-signed cert, expired cert, wrong hostname, port not 443. Tool shows specific error.
Does SSL affect SEO?+
Yes! Google uses HTTPS as ranking factor since 2014. Browsers mark HTTP sites as "Not Secure" (drops conversions). Always use HTTPS.
How to fix SSL warnings?+
Renew expired cert, fix hostname mismatch (cert for example.com but URL is sub.example.com), use trusted CA (not self-signed), check certificate chain.
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