Although Facebook Messenger and Facebook Groups does have some text formatting options, including the ability to create bold text, there are no options for making text bold in Facebook posts.

There is a free tool, the link to which is below, that allows you to create many different special effects to text you posts on Facebook.com including posts, groups and Facebook messenger.

To create bold or other fancy text that you can paste anywhere in Facebook:

  1. Go to the bold text tool for Facebook.
  2. In the main text box, type the text you want to be bold or specially formatted in some other way.
  3. Press the Bold Facebook Posts button.
  4. Instantly the text is converted into multiple special effects including a couple of different bold styles, ...