Creepypasta refers to horror stories that are shared around the internet and are often brief, user-generated, paranormal stories intended to scare readers. The term "creepypasta" is a portmanteau of the words "creepy" and "copypasta," which denotes viral, copied and pasted text. These stories can include topics such as ghosts, murder, suicide, zombies, rituals to summon paranormal entities, and haunted television shows and video games. Creepypastas range in length from a single paragraph to lengthy, multi-part series that can span multiple media types.

The subject of creepypasta varies widely, and there are many notable creepypasta stories, including "Slender Man," "Ben Drowned," "Jeff the Killer," "Ted the Caver," and "Sonic.exe". Although creepypastas are often anonymous, authorship has become increasingly important over time, and many creepypastas are now written by named authors.

Creepypasta is a popular pastime for both kids and adults around the world, and its basically fan fiction for horror. Its like the internet version of scary camp stories that everyone knows, with tales that have slight differences but retain the same scary core features.