TLS Version Check
Security & Encryption Analysis
Analyze supported TLS versions, cipher suites, and security configuration of your domain to ensure modern and secure connections.
TLS Version Support
| TLS Version | Status | Negotiated Protocol | Cipher Suite | Error |
|---|
Connection Details
Cipher Suite
-
Negotiated Protocol
-
Duration
-
No Data
Run a TLS check to see results.
Learn more & FAQ
What does a TLS version checker do?
A server can be configured to support several TLS and SSL protocol versions at once, including outdated ones left over from years ago. This tool connects to your server and tests each protocol version in turn, showing you exactly which ones it will negotiate - so you can confirm it only accepts the current, secure versions.
How to read your results
Each protocol version tested (SSL 3.0 through TLS 1.3) is marked supported or not supported. The ideal result supports only TLS 1.2 and TLS 1.3. Anything older showing as supported is a configuration to fix - it doesn't mean your site is currently being attacked, but it does mean the door is unnecessarily left open.
Frequently asked questions
Which TLS versions are considered safe to use today?
TLS 1.2 and TLS 1.3 are the current safe standards; TLS 1.3 is the faster and more secure of the two. SSL 2.0, SSL 3.0, TLS 1.0, and TLS 1.1 are all deprecated and considered insecure - major browsers have removed support for them.
Why would a server still support an outdated TLS version?
Usually to stay compatible with legacy clients - older devices, internal systems, or integrations that haven't been updated. Keeping an old protocol enabled for compatibility also keeps that server vulnerable to the known weaknesses in that protocol, so it's a tradeoff worth revisiting regularly.
What's the practical risk of supporting TLS 1.0 or 1.1?
Both have documented cryptographic weaknesses (including vulnerability to attacks like POODLE and BEAST on related protocols) and are explicitly disallowed by PCI-DSS for payment processing. Most compliance frameworks and many clients now reject connections to a server offering them at all.
How do I disable old TLS versions on my server?
This is configured at the web server or load balancer level (nginx, Apache, IIS, or your CDN's TLS settings) - restrict the allowed protocol list to TLS 1.2 and 1.3 only. The exact setting depends on your server software; most hosting providers and CDNs document this explicitly.
Does TLS 1.3 require any extra setup compared to TLS 1.2?
No - TLS 1.3 negotiates automatically with any modern server configuration that lists it as supported, and clients that don't support it fall back to TLS 1.2. There's no separate certificate or configuration needed beyond enabling the protocol itself.