You can only link your Instagram account to Facebook via the Instagram mobile app for iOS or Android. You can’t do it by signing in to your Instagram account on the web at Instagram.com.

The Benefits of Linking Your Instagram Account to Facebook

When you link your Instagram and Facebook accounts, you’ll be able to: To select a page, choose Facebook Profile in the Share to column. A list of Facebook Pages you manage appears on the next tab. Tap any page to select it so you can share your Instagram posts to it.

Increase the chances of more of your friends and followers seeing your content. Save yourself the extra time from posting the same content on two separate social networks. Select whether you want to post your Instagram content to either your Facebook profile or a Page you manage. Share Instagram posts automatically to Facebook, or manually select the posts you want to post to Facebook from the post caption. Have Instagram photo and video posts show up as Facebook photo and video posts (as opposed to links to the original Instagram posts). Choose whether you want to send posts, stories, or both posts and stories to Facebook. Post your Instagram stories automatically as Facebook stories.

If you want to unlink your Facebook account from your Instagram account, go to the Facebook tab from Settings > Account > Linked Accounts and choose Unlink Account. You can link your Facebook account to your Instagram account again at any time by following the steps above. If you decide to relink it, you might not have to log in to Facebook again if Instagram remembers your login details.