Open TikTok and tap the comment box or caption field
Type the emoji code in square brackets, such as [smile]
Use the built-in TikTok emoji codes from a TikTok emoji list
Copy the emoji code and paste it where you want it
Post the comment or caption to display the TikTok emoji
Use a TikTok emoji keyboard or emoji list website to find more codes
Check that the code is typed exactly, including brackets
Use TikTok on mobile or desktop to enter the codes manually