TLS Version Checker

TLS Version Checker tool tests your website’s TLS configuration. It checks for TLS 1.3, TLS 1.2, TLS 1.1, and TLS 1.0 support. After the scan, you get a security rating from Excellent to Needs Improvement. You also see a summary and a list of recommendations.

TLS stands for Transport Layer Security. It is the protocol that encrypts data between a web server and a browser. TLS makes HTTPS possible. Without TLS, passwords, credit card numbers, and other private information would travel over the internet in plain text. Anyone could read them.

The internet has used several versions of TLS over the years. TLS 1.0 came out in 1999. TLS 1.1 followed in 2006. TLS 1.2 arrived in 2008. TLS 1.3 is the newest version and was released in 2018. Each new version fixed security flaws and added better encryption. Today, TLS 1.3 and TLS 1.2 are the only versions considered secure. TLS 1.0 and TLS 1.1 are deprecated. They have known vulnerabilities and should not be used.

Many website owners do not know which TLS versions their server supports. This tool gives you that answer in seconds. You do not need to log in or install anything.

Key features of this tool

• Scans for TLS 1.3, TLS 1.2, TLS 1.1, and TLS 1.0 support
• Shows the highest supported TLS version
• Provides a security rating with stars
• Gives a plain English security summary
• Lists actionable recommendations
• Displays scan details like hostname and scan time
• Copies results to your clipboard with one click
• Works with any domain, including subdomains
• No login or registration required

How To Use This Tool

Step 1: Enter a domain name in the input field. You can type example.com or https://example.com. Both work.

Step 2: Click the Check button. The tool starts scanning your server.

Step 3: Wait a few seconds. The scan usually takes less than one second.

Step 4: Review the results. You will see the highest supported TLS version, a table of all versions, a security rating, a summary, and recommendations.

Step 5: Click the Copy Results button to save the output. You can paste it into an email, a report, or a ticket.

That is all. You can run the tool as many times as you want.

Why TLS Versions Matter

TLS is the foundation of web security. It protects every HTTPS connection. But not all TLS versions are equal.

TLS 1.3 is the gold standard. It removes old, weak encryption algorithms. It uses Perfect Forward Secrecy by default. This means each session uses a new, temporary key. Even if someone steals your server’s private key, they cannot decrypt past conversations. TLS 1.3 also has a faster handshake. It takes fewer round trips to establish a connection.

TLS 1.2 is still acceptable. Many servers and browsers support it. But TLS 1.2 allows many weak cipher suites. Misconfiguration is common. TLS 1.2 does not require forward secrecy. Some setups are less secure than others.

TLS 1.1 and TLS 1.0 are insecure. They use outdated algorithms like SHA-1 and 3DES. They are vulnerable to attacks like BEAST. Major browsers have stopped supporting them. Regulatory standards like PCI DSS require their removal. The Internet Engineering Task Force formally deprecated both versions in 2021.

Running an outdated TLS version puts your users at risk. It also hurts your SEO. Google and other search engines favor secure websites. A modern TLS configuration signals trust.

Frequently Asked Questions

What is a TLS version checker?

A TLS version checker is a tool that tests which TLS protocols a web server supports. It connects to the server on port 443 and attempts handshakes with each TLS version. The tool records which versions succeed and which fail. The results show you the server’s TLS capabilities.

How does the TLS test work?

The tool tries to establish a secure connection using each TLS version separately. For TLS 1.3, it uses the specific crypto method for that version. Same for TLS 1.2, 1.1, and 1.0. If the connection succeeds, that version is marked as supported. If it fails, the version is marked as not supported. The whole process takes less than a second.

Why is TLS 1.3 better than TLS 1.2?

TLS 1.3 is faster and more secure. It removes weak encryption algorithms. It enforces forward secrecy. It reduces the number of round trips during the handshake. TLS 1.2 still allows outdated cipher suites. Many TLS 1.2 configurations have security gaps.

Should I disable TLS 1.0 and TLS 1.1?

Yes. Both versions are deprecated and insecure. They use weak algorithms and have known vulnerabilities. Most modern browsers and clients support TLS 1.2 or 1.3. Disabling TLS 1.0 and 1.1 reduces your attack surface. It also helps you comply with security standards like PCI DSS.

What does the security rating mean?

The rating is based on which TLS versions your server supports. A server with only TLS 1.3 and 1.2 gets Excellent. A server that still supports TLS 1.0 gets Needs Improvement. The rating helps you understand your security posture at a glance.

Can I test any domain?

Yes. You can test any public domain. The tool works with root domains and subdomains. You can also test IP addresses, but the results may vary depending on the hosting setup.

Is my data stored or shared?

No. The tool does not store any data. It only performs a live scan. Your domain name is not saved, logged, or shared with third parties.

Does this tool work with Cloudflare or other CDNs?

Yes. The tool connects directly to your origin server through the CDN. The results reflect the TLS configuration at the CDN edge. This is usually what your visitors experience.

What if the scan fails?

If the scan fails, the tool shows an error message. Common reasons include: the domain does not resolve, the server does not respond on port 443, or the connection times out. Check the domain spelling and try again. If the problem persists, the server may not support HTTPS at all.

How often should I check my TLS configuration?

You should check after any server or configuration change. You should also check periodically, at least once a year. TLS best practices evolve. New vulnerabilities are discovered. Regular checks help you stay secure.

Start Your TLS Scan Now

Enter a domain above and click Check. The tool will scan your server and show you the results in seconds. You will know exactly which TLS versions your website supports. You will also get a clear security rating and step by step recommendations.

---

Disclaimer: Results from this tool are provided for informational purposes only. While we strive for accuracy, we cannot guarantee that every result is complete or error-free. Always verify important findings using additional methods before making security, technical, or business decisions.