ChatGPT Prompt for Fanfiction: 12 Ideas to Plan and Write

A ChatGPT prompt for fanfiction helps you plan an original story in a world you love: the premise, the character voices, the canon facts, and the chapter shape. The 12 prompts below work for one-shots and long multi-chapter fics. Use them to plan and practice, and write the story in your own words without copying text from the source.

Keep fan works noncommercial and transformative, since fair use is never guaranteed, and follow the rules of the archive where you post. Never write sexual content involving minors or real people.

Find the story

1. Premise options

My fandom is [fandom], set [where in canon]. My rough idea: [idea]. Give me three one-line premises, each with the question that drives the plot.

2. Missing scene

Suggest five missing scenes that could happen between [event A] and [event B] in [fandom], using only these canon facts [notes].

3. AU setup

Set [characters] in an alternate universe: [setting, such as a coffee shop or space station]. List what stays true to each character and what changes because of the new setting.

Get the characters right

4. Character voice sheet

From my notes [notes on each character], write three speech habits and one thing each character would never say.

5. Out-of-character check

Here is a scene I wrote [paste]. Point out any line where [character] sounds unlike my notes [notes] and suggest a fix in my style.

6. Original character fit

I want to add an original character [description] to [fandom]. Suggest how they meet the main cast and how to keep them from taking over the story.

Shape the plot

7. Canon check

List each canon fact my plot touches [plot summary] from these notes [canon notes], and say whether the story keeps it or changes it as an AU.

8. Chapter outline

Outline a [number]-chapter fic of about [word count] words for this premise [premise]: chapter goal, the turn in each chapter, and the payoff.

9. Trope with a twist

I want to write [trope, such as enemies to friends or found family] for [characters]. Give me three ways to make it feel fresh for these characters.

Write and post

10. Opening line options

Write five opening lines for this first scene [scene summary] in [tone], from [character]'s point of view, in original words.

11. Feedback on my draft

Give me feedback on my chapter [paste]: pacing, dialogue, and whether the ending makes readers want the next chapter. Do not rewrite it; point to lines.

12. Summary and tags

Write a two-sentence summary for my fic [premise] and a list of tags by type: fandom, characters, relationship, genre, and content warnings.

Plan the whole fic in one prompt

The flagship Fanfiction Prompt: Original Plot From Your Fandom Notes takes your fandom, canon notes, characters, idea, genre and tone, length, and rating. It returns premise options, a character voice sheet, a canon check, a chapter outline, a short first scene in original prose, and a summary with tags. Its example plans a Holmes and Watson friendship mystery set after Watson moves out of Baker Street.

Tips for fanfiction with ChatGPT

Feed it your own notes about canon instead of asking it to recall the books or show, since AI can mix up details. Use the drafts as practice and write the posted story yourself, in your own voice. Do not paste or copy passages from the original work, and check the rules of the archive where you post.

Related prompts

Set up a writing partner with ChatGPT custom instructions for story writing, polish scenes with the short story scene workshop and line edit, or build a new setting with the world building framework. For longer projects, read ChatGPT prompts for writing a book.

Creating your own characters? See AI prompts for fantasy characters.

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