SSL Tools

TLS Version Checker

Find out which TLS version a website's server uses for HTTPS connections and whether it is still current.

Not sure what to enter? Try an example: cloudflare.com

Free & instant No signup How to use FAQ

Enter a domain to see the TLS version the server agrees to use and the algorithm its certificate is signed with.

What is TLS and which version should a website use?

TLS (Transport Layer Security) is the encryption protocol behind HTTPS. This checker connects to the server and reports the TLS version and signature algorithm it negotiates. TLS 1.2 and TLS 1.3 are considered secure today; TLS 1.0 and 1.1 are deprecated and rejected by modern browsers.

How to check a server's TLS version

Enter the domain in the box above.
Click Check TLS Version.
Confirm the negotiated version is TLS 1.2 or TLS 1.3.
If an older version is reported, update your web server or load balancer configuration to disable TLS 1.0 and 1.1.

Related checks

To check the certificate itself, use the SSL Certificate Checker.
To see whether browsers are told to always use HTTPS, run the HSTS Checker.

Outdated TLS versions can hurt security and compliance - JustChecker keeps track of this for you automatically.

Frequently Asked Questions

TLS 1.2 and TLS 1.3. TLS 1.0 and 1.1 were retired by all major browsers in 2020 and are rejected by many security scanners and payment providers.

On Nginx add TLSv1.3 to ssl_protocols; on Apache use SSLProtocol -all +TLSv1.2 +TLSv1.3. Most modern hosting control panels and CDNs enable it by default.

Yes, slightly. TLS 1.3 needs one round trip fewer to set up a connection than TLS 1.2, so pages start loading a little sooner - most noticeable on mobile networks.

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