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11 TLS Security Checks — Free

Free TLS Checker

Test TLS version support, detect deprecated TLS 1.0/1.1, analyze cipher suite strength, and verify HSTS configuration — all in one free TLS security check.

Results in under 60 secondsFaster than SSL Labs

No https:// needed · Free · No credit card

What is TLS and Why Does It Need Checking?

What is TLS?

TLS (Transport Layer Security) is the cryptographic protocol that encrypts data between a user's browser and your web server. It's the technology behind the padlock icon and https:// prefix. TLS replaced the older, insecure SSL protocol.

TLS 1.0 and 1.1 are deprecated by the IETF and all major browsers. Running them exposes your visitors to downgrade attacks. TLS 1.3 is the current gold standard — faster and more secure than TLS 1.2.

Why Run a TLS Checker?

  • Catch deprecated TLS 1.0/1.1 — browsers flag or block sites running old protocol versions
  • Harden cipher suites — weak ciphers (RC4, 3DES) enable BEAST, SWEET32, and other attacks
  • Enable forward secrecy — ECDHE key exchange protects past sessions if the private key leaks
  • Verify HSTS — forces browsers to always use HTTPS, preventing downgrade attacks

How to fix common TLS issues: See our detailed guides on checking TLS version, disabling deprecated TLS 1.0/1.1, hardening cipher suites, and enabling HSTS.

What We Check

TLS 1.2 / 1.3 version verification
Deprecated TLS 1.0 / 1.1 detection
Cipher suite strength analysis
Forward secrecy (ECDHE) verification
HSTS & preload readiness check
Certificate chain validation
OCSP stapling status
Mixed content detection

How It Works

1

Enter your website URL in the TLS checker above

2

We initiate a TLS handshake and probe supported protocol versions

3

Cipher suites are enumerated and evaluated for strength

4

Certificate chain and OCSP stapling are validated

5

You receive a prioritized report with step-by-step remediation guidance

SecScanner TLS Checker vs Qualys SSL Labs

Both tools test TLS configuration. SecScanner also covers security headers, DNS, and content vulnerabilities in the same scan.

FeatureSecScannerSSL Labs
TLS 1.2 / 1.3 version check
Deprecated TLS 1.0 / 1.1 detection
Cipher suite analysis
OCSP stapling verification
HSTS configuration check
Security headers (CSP, X-Frame-Options, etc.)
DNS security (SPF, DKIM, DMARC)
Content vulnerability scan
Actionable remediation guidance
Results in under 60 seconds
Continuous monitoring

TLS Security Checks Included

This TLS checker runs the following security checks — click any to learn more

TLS VersionDeprecated TLS versionsCipher SuiteHTTPS enabledHTTP to HTTPS RedirectCertificate ExpiryCertificate Hostname & ChainOCSP StaplingHSTS enabledHSTS Preload ReadinessMixed Content

Want deeper insight? Explore individual TLS check pages:

TLS version check·Deprecated TLS versions·Cipher suite·HSTS header·HSTS preload·OCSP stapling·Certificate expiry

Frequently Asked Questions

What TLS versions should my server support?
Your server should support TLS 1.2 and TLS 1.3 while disabling all older versions (SSL 2.0, SSL 3.0, TLS 1.0, and TLS 1.1). TLS 1.3 offers the best security with faster handshakes and mandatory forward secrecy. TLS 1.0 and 1.1 are deprecated by all major browsers and the IETF (RFC 8996).
What cipher suites should I disable?
Disable all cipher suites using RC4, 3DES, DES, EXPORT, NULL, or MD5. Also disable cipher suites without forward secrecy (non-ECDHE/DHE key exchange). Good TLS 1.3 cipher suites include TLS_AES_256_GCM_SHA384 and TLS_AES_128_GCM_SHA256. For TLS 1.2, prefer ECDHE-RSA-AES256-GCM-SHA384.
What is forward secrecy and why does it matter?
Forward secrecy (Perfect Forward Secrecy / PFS) means each TLS session uses a unique ephemeral key. If your server's private key is ever compromised, past sessions cannot be decrypted. Use ECDHE or DHE key exchange to enable forward secrecy — our TLS checker flags cipher suites that lack it.
How do I fix TLS 1.0 / 1.1 deprecation warnings?
Edit your web server configuration to remove TLS 1.0 and 1.1 from the protocol list. For Nginx: set 'ssl_protocols TLSv1.2 TLSv1.3;'. For Apache: set 'SSLProtocol all -SSLv3 -TLSv1 -TLSv1.1'. For Cloudflare: set Minimum TLS Version to 1.2 in the SSL/TLS dashboard.
Is this TLS checker free?
Yes — all TLS checks including cipher suite analysis, deprecated version detection, and OCSP stapling are free for every scan. Upgrade to Pro for continuous monitoring with automatic alerts when your TLS configuration degrades.
How does this differ from the Qualys SSL Labs TLS test?
Both check TLS protocol version, cipher suites, and certificate chain. The key difference: SSL Labs focuses exclusively on TLS and gives an A–F grade, while SecScanner covers TLS plus security headers, DNS security (SPF/DKIM/DMARC), and content vulnerabilities — a complete site security picture in one scan and under 60 seconds.
What is OCSP stapling and do I need it?
OCSP stapling lets your server cache and serve the certificate revocation status from the CA, so browsers don't need to query the CA on every connection. Without it, browsers add latency and expose a privacy signal. Our TLS checker verifies stapling is active and returns a valid response.

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Want the Full Security Picture?

TLS is just one layer. Run a full 62-check security audit covering headers, vulnerabilities, DNS, and more.

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