Click the drop-down menu under "Font" and select the desired font for the Like button. Click the "Get Code" button. A pop-up box displays the HTML code for the Like button.

Click the "Get Code" button. Copy the provided code snippet. Open the HTML source file of the Web page you want to add the Facebook "Like" button to.

If so, this section is for you. Facebook makes it quite easy to copy-paste a code snippet right into the HTML of any page/post and have the “Like” button appear instantly.

Read “You Are Not Expected to Understand This”: How 26 Lines of Code Changed the World here. Back in 2009, Facebook launched a world-changing piece of code—the “like” button.

Web publishers have quickly adopted a button that lets visitors express "like" for their sites. But it also lets Facebook track those visitors as they switch from one site to another.