After reports that Facebook was set to unveil a subscribe button for websites, the company has now made it official and available.

“The Subscribe button for websites works just like the button on Facebook; once clicked the user will begin seeing the public posts of the person they have subscribed to in his or her News Feed,” says Facebook’s Stoyan Stefanov. “The subscribe action is also shared — allowing others to subscribe directly via the News Feed stories, and further increasing viral distribution.”

“Similar to the Like button, the Subscribe button can be easily added using XFBML or an iframe,” he adds.

If you go to the actual plugin page, Facebook says:

There are two Subscribe button implementations: XFBML and Iframe. The XFBML (also available in HTML5-compliant markup) version is more versatile, and requires use of the JavaScript SDK. The XFBML dynamically re-sizes its height according to whether there are profile pictures to display and gives you the ability (through the JavaScript library) to listen for subscribe events so that you know in real time when a user clicks the Subscribe button.

Facebook has a page set up where you can see sites that already have the button implemented. You can browse around and see how it’s already in use.

The button is an extension of the subscribe button for profiles launched not too long ago. The feature gives users the ability to follow public updates from individuals without having to actually have friend requests accepted. In effect, it makes Facebook more able to be used like Twitter and Google+.

Go here to get the code for the button.