Web/HTML/Link types/preconnect

The preconnect keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin.

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'preconnect' in that specification.	Living Standard

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
preconnect Experimental'	Chrome Full support 46	Edge Full support 79	Firefox Full support 39 Notes' Full support 39 Notes' Notes' Before Firefox 41, it doesn't obey the crossorigin attribute.	IE No support No	Opera Full support 33	Safari Full support 11.1	WebView Android Full support 46	Chrome Android Full support 46	Firefox Android Full support 39 Notes' Full support 39 Notes' Notes' Before Firefox 41, it doesn't obey the crossorigin attribute.	Opera Android Full support 33	Safari iOS Full support 11.3	Samsung Internet Android Full support 4.0

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

See implementation notes.'

See implementation notes.

Link types: preconnect by Mozilla Contributors is licensed under CC-BY-SA 2.5.