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11 TLS/SSL Checks — Free

Free SSL Certificate Checker & SSL Test Tool

Test SSL certificate expiry, TLS version, cipher suite strength, certificate chain, and HSTS settings in one free SSL test. Get instant results with actionable fix guidance.

Results in under 60 secondsFaster than SSL Labs

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

What is SSL/TLS and Why Does It Matter?

What is SSL?

SSL (Secure Sockets Layer) and its modern successor TLS (Transport Layer Security) are cryptographic protocols that encrypt data between a user's browser and your web server. When a website uses SSL/TLS, the URL starts with https:// and a padlock icon appears in the browser.

An SSL certificate is a digital certificate that authenticates your website's identity and enables encrypted connections. Without a valid SSL certificate, browsers show security warnings that drive away visitors.

Why Run an SSL Test?

  • Catch expiring certs — SSL certificates expire; a lapsed cert triggers browser warnings instantly
  • Verify TLS version — TLS 1.0 and 1.1 are deprecated; you must support TLS 1.2 or 1.3
  • Harden cipher suites — weak ciphers (RC4, 3DES) leave your site vulnerable to attacks
  • Check HSTS — HTTP Strict Transport Security forces browsers to always use HTTPS

How to fix common SSL issues: If your SSL test reveals problems, see our detailed guides on fixing certificate expiry, disabling deprecated TLS, enabling HSTS, and hardening cipher suites.

What We Check

Certificate expiration monitoring
TLS 1.2/1.3 version verification
Cipher suite strength analysis
Certificate chain validation
Mixed content detection
HSTS & preload readiness check
OCSP stapling status
Deprecated TLS 1.0/1.1 detection

How It Works

1

Enter your website URL in the scanner above

2

We establish a secure connection and analyze your SSL/TLS certificate

3

TLS handshake is tested for version support and cipher strength

4

Certificate chain is validated for completeness and trust

5

You get a detailed report with actionable fix recommendations

SecScanner vs Qualys SSL Labs

Both tools check your TLS configuration. SecScanner goes further — covering security headers, DNS, and content vulnerabilities in the same scan.

FeatureSecScannerSSL Labs
SSL/TLS checks
Cipher suite analysis
Certificate chain check
TLS 1.0/1.1 deprecation check
OCSP stapling verification
HSTS configuration check
Security headers (CSP, X-Frame-Options, etc.)
DNS security (SPF, DKIM, DMARC)
Content vulnerability scan
Actionable fix guidance
Results in under 60 seconds
Continuous monitoring

SSL/TLS Security Checks Included

This scanner runs the following TLS/SSL security checks — click any to learn more

HTTPS enabledHTTP to HTTPS RedirectTLS VersionDeprecated TLS versionsCipher SuiteCertificate ExpiryCertificate Hostname & ChainMixed ContentOCSP StaplingHSTS enabledHSTS Preload Readiness

Want deeper insight? Explore individual SSL/TLS check pages:

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

Frequently Asked Questions

What does this SSL checker test?
Our SSL checker verifies your certificate expiry, TLS version (1.2/1.3), cipher suite strength, certificate chain trust, mixed content issues, HSTS configuration, and OCSP stapling. It covers 11 checks across your entire TLS/HTTPS setup.
What TLS version should my site use?
You should support TLS 1.2 and TLS 1.3 while disabling older versions (TLS 1.0, 1.1, and all SSL versions). TLS 1.3 offers the best security and performance with faster handshakes. Our TLS checker flags any deprecated versions automatically.
How does this compare to Qualys SSL Labs (SSL Test)?
Both tools check TLS configuration, certificate chain, and cipher suites. The key difference: SSL Labs gives you an A–F grade focused purely on TLS, while SecScanner covers TLS plus security headers, DNS security (SPF/DKIM/DMARC), content vulnerabilities, and HSTS — giving you a complete security picture in one scan. SecScanner is also significantly faster (under 60 seconds vs. a few minutes for SSL Labs).
How do I check my certificate chain?
Run a scan with SecScanner — the 'Certificate Hostname & Chain' check validates that your entire certificate chain is trusted and complete. A broken chain causes browser 'Untrusted certificate' errors even if your leaf certificate is valid. Common issues include missing intermediate certificates.
How do I check which cipher suites my server supports?
Our cipher suite checker analyzes your TLS handshake and identifies all supported cipher suites, flagging weak or deprecated ones (RC4, 3DES, EXPORT ciphers). You should only support strong AEAD cipher suites with ECDHE key exchange for forward secrecy.
Is this a TLS scanner too?
Yes — SecScanner is both an SSL certificate checker and a TLS scanner. It tests TLS 1.0, 1.1, 1.2, and 1.3 support, verifies cipher suite security, checks the TLS handshake, and confirms OCSP stapling is enabled. Everything you'd want from a dedicated TLS checker.
How often should I check my SSL certificate?
We recommend checking monthly. Certificates typically last 90 days (Let's Encrypt) to 1 year. Expired certificates cause browser warnings that drive away visitors. Upgrade to Pro for automated daily or weekly monitoring with email alerts when expiry is approaching.
Is this SSL checker free?
Yes, all SSL/TLS checks including Certificate Chain validation and OCSP Stapling are included in every free scan. Upgrade to get continuous monitoring with automatic alerts when your certificate is about to expire.
What is OCSP stapling and why does it matter?
OCSP (Online Certificate Status Protocol) stapling lets your server pre-fetch a certificate revocation status from the CA and attach it to the TLS handshake. Without it, browsers must contact the CA directly for every connection — adding latency and a privacy risk. Our scanner verifies OCSP stapling is active on your server.

More Security Tools

SSL is one piece of the puzzle. Explore our other free security checkers.

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Scanner Comparison Guide

SSL Labs vs SecScanner vs Mozilla Observatory

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Want the Full Security Picture?

SSL is just the start. Run a full 62-check security audit covering headers, vulnerabilities, DNS, and more.

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