How to Check the TLS Version for a Website & Your Browser

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Learn how to view the TLS version & other encryption details on any website or browser
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This wikiHow guide teaches easy ways to find which versions of TLS are configured on a web server. You’ll also learn how to check which TLS versions are supported by your web browser.

Things You Should Know

  • The easiest way to check the TLS version of a website is to use a TLS checker like https://www.ssllabs.com/ssltest .
  • While Chrome no longer lets you check a website's TLS version in Developer Tools, the version is still easy to find in Firefox and Microsoft Edge.
  • To check your web browser's supported TLS versions, go to browserleaks.com/tls.
Method 1
Method 1 of 4:

Using a TLS Checker

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    Scan the website at https://www.ssllabs.com/ssltest . This free TLS-checking tool scans the website and creates a report containing the TLS version, cipher suites, supported protocols, and more. Just enter the hostname (such as www.facebook.com ) into the "Hostname" field and click Submit to get started. [1]
    • If you're using an ad blocker like uBlock Origin or a privacy extension like Privacy Badger, disable it before starting the scan.
    • If you don’t want the domain you're searching for to appear on SSL Labs’ list of recent queries, check the box next to ″Do not show the results on the boards.″
    • The scan can take up to 3 minutes. Once the scan is complete, you'll see a letter grade (e.g., A+ or D) appear next to the server's IP address.
  2. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a6\/Check-the-TLS-Version-on-a-Website-Step-2-Version-2.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-2-Version-2.jpg","bigUrl":"\/images\/thumb\/a\/a6\/Check-the-TLS-Version-on-a-Website-Step-2-Version-2.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    If the website is mapped to more than one server, you'll see the IP address of each server in the results. You can check the TLS version for each server separately.
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    ″ In the "Protocols" section under "Configuration," you'll see a list of all TLS versions, and a simple "Yes" or "No" to indicate which of those versions are supported. All TLS versions labeled ″Yes″ are configured on this website.
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Method 2
Method 2 of 4:

Using Microsoft Edge

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    While Google Chrome used to make it easy to find the TLS version of any website in Developer Tools, that option is no longer available. Fortunately, this information is still readily available if you're using Microsoft Edge.
  2. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c2\/Check-the-TLS-Version-on-a-Website-Step-5-Version-2.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-5-Version-2.jpg","bigUrl":"\/images\/thumb\/c\/c2\/Check-the-TLS-Version-on-a-Website-Step-5-Version-2.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-5-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    If you're using a one-button mouse, Ctrl + click the page instead. This opens the developer view of the page. [2]
  3. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/dd\/Check-the-TLS-Version-on-a-Website-Step-6-Version-2.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-6-Version-2.jpg","bigUrl":"\/images\/thumb\/d\/dd\/Check-the-TLS-Version-on-a-Website-Step-6-Version-2.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-6-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    You'll see a menu bar in the right panel with a "Welcome" tab on its far left side. To find the Security tab, you'll need to click >> . [3]
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    You'll find the TLS version (e.g., TLS 1.3) and other encryption details here.
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Method 3
Method 3 of 4:

Using Firefox

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    Unlike most other browsers, Firefox makes it incredibly easy to check the TLS version of any website in just a few clicks.
  2. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/86\/Check-the-TLS-Version-on-a-Website-Step-9-Version-2.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-9-Version-2.jpg","bigUrl":"\/images\/thumb\/8\/86\/Check-the-TLS-Version-on-a-Website-Step-9-Version-2.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-9-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    You'll see the padlock icon on the right side of the address bar. [4]
  3. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/61\/Check-the-TLS-Version-on-a-Website-Step-10.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-10.jpg","bigUrl":"\/images\/thumb\/6\/61\/Check-the-TLS-Version-on-a-Website-Step-10.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-10.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    It'll be below the certificate issuer's name. [5]
  4. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/ec\/Check-the-TLS-Version-on-a-Website-Step-11.jpg\/v4-460px-Check-the-TLS-Version-on-a-Website-Step-11.jpg","bigUrl":"\/images\/thumb\/e\/ec\/Check-the-TLS-Version-on-a-Website-Step-11.jpg\/v4-728px-Check-the-TLS-Version-on-a-Website-Step-11.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    This is the bottom section of the Security tab, which opens by default. The TLS version appears next to "Connection Encrypted," along with other details about the website's encryption capabilities.
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Method 4
Method 4 of 4:

Checking Your Browser

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    Go to https://browserleaks.com/tls to check your TLS version. This site will evaluate your current web browser (including Chrome, Safari, and Edge) and report which versions of TLS it supports.
    • Under "Protocol Support," you'll see a list of all TLS versions, from TLS 1.0 to TLS 1.3. Your browser's supported versions are labeled "Enabled" with a green checkmark.
    • If you're using a privacy-focused browsing extension or add-on like Privacy Badger, disable it and reload the page. Such extensions can prevent Browser Leaks from identifying your browser's TLS version.

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      References

      1. ↑ https://www.ssllabs.com/ssltest/
      2. ↑ https://learn.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium/css/inspect
      3. ↑ https://learn.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium/security/
      4. ↑ https://support.mozilla.org/en-US/kb/site-information-panel
      5. ↑ https://support.mozilla.org/en-US/kb/site-information-panel

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