This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The isSecureContext read-only property of the WindowOrWorkerGlobalScope interface returns a boolean indicating whether the current context is secure (true) or not (false).


var isItSecure = self.isSecureContext; // or just isSecureContext


A Boolean.


Specification Status Comment
Secure Contexts
The definition of 'WindowOrWorkerGlobalScope.isSecureContext' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 55Edge ? Firefox Full support 52IE ? Opera ? Safari ? WebView Android Full support 55Chrome Android Full support 55Edge Mobile ? Firefox Android Full support 52Opera Android ? Safari iOS ? Samsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also

Document Tags and Contributors

Contributors to this page: mdnwebdocs-bot, fscholz, kenrick95, chrisdavidmills, jpmedley
Last updated by: mdnwebdocs-bot,