What's the difference between headcanon and fanon?

Answer 1

Headcanon is something more personal for a writer, artist, or fan that makes sense to them, like a personal revelation. Fanon is something generally agreed upon by fans, like a consensus.

Answer 2

Headcanon refers to personal beliefs or interpretations about a fictional work that an individual holds, while fanon refers to widely accepted ideas or interpretations within a fandom that may not be explicitly stated in the original work. Headcanon is personal and can vary from person to person, whereas fanon is more collective and shared within a fandom.