SSL Certificate Check Online — Free

Check any website's SSL certificate in seconds. We show expiry date, certificate chain, protocol version, cipher suite, and detect common issues.

Try it now — free →

What we check

Certificate expiry date
Chain of trust (CA)
Protocol (TLS 1.2 / 1.3)
Cipher suite
Subject Alternative Names
OCSP Stapling

SSL Monitoring

Set up an SSL monitor and get alerts 30, 14, and 7 days before your certificate expires. Never miss a renewal again.

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CertificateExpiry, issuer, domains (SAN)

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ChainIntermediate and root CA validation

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TLS ProtocolTLS version and cipher suite

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VulnerabilitiesHeartbleed, POODLE, weak ciphers

What Does the SSL Check Cover?

SSL/TLS is the encryption protocol that protects data between the browser and server. Our tool analyzes the certificate, chain of trust, TLS version, and known vulnerabilities.

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Certificate Details

Issuer, validity period, signature algorithm, covered domains (SAN), and validation type (DV/OV/EV).

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Chain of Trust

Full chain verification: from leaf certificate through intermediates to root CA.

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TLS Analysis

Protocol version (TLS 1.2/1.3), cipher suites, Perfect Forward Secrecy (PFS) support.

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Expiry Alerts

Set up a monitor — get Telegram and email alerts 30/14/7 days before expiration.

DV vs OV vs EV Certificates

DV (Domain Validation)

Confirms domain ownership only
Issued in minutes automatically
Free via Let's Encrypt
Suitable for most websites
Most common certificate type

OV / EV

Organization (OV) or Extended Validation (EV)
Issued in 1-5 business days
Costs $50 to $500/year
For finance, e-commerce, government sites
Increases user trust

Common Mistakes

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Expired certificateBrowsers block sites with expired SSL. Set up auto-renewal or monitoring.

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Incomplete certificate chainWithout intermediate CA, some browsers and bots cannot verify the certificate.

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Mixed content on HTTPS siteHTTP resources on an HTTPS page — the browser lock icon disappears, reducing trust.

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Using TLS 1.0/1.1Legacy TLS versions have known vulnerabilities. Use TLS 1.2+ or 1.3.

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Domain mismatch in certificateThe certificate must cover all site domains, including www and subdomains.

Best Practices

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Set up auto-renewalLet's Encrypt + certbot with cron — certificate renews automatically every 60-90 days.

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Enable HSTSStrict-Transport-Security header forces browsers to always use HTTPS.

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Use TLS 1.3TLS 1.3 is faster (1-RTT handshake) and safer — legacy ciphers removed.

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Monitor expiration datesCreate a monitor on Enterno.io — get notified well before expiration.

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Verify chain after renewalAfter certificate renewal, confirm that intermediate certificates are installed.

Frequently Asked Questions

How to check an SSL certificate?

Enter a domain in the SSL check form — results appear in 1-2 seconds.

Is the SSL check free?

Yes, completely free and no registration required.