For horror writers
Plan and write your horror novel with AI
Pitch the fear in a sentence or two. FictionAI drafts a story bible (setting, the threat and its rules, cast, chapter outline) that you edit, then writes each chapter with it in view.
3 books free, no credit card. AI use is billed by OpenRouter to your own account.
What you get for a horror book
Setting and rules
The world card holds your setting, time period, locations and rules: how the haunting works, what the creature can and cannot do.
A threat with a backstory
Your antagonist sits in the cast with a description, backstory, motivation and arc, whether it is a ghost, a killer or something older.
Escalation in the outline
Each outline chapter has a summary, key events and a closing hook, so you can see where dread builds and where it breaks.
Tone and pacing
Fine-tune sets tone (for example Dark & Gritty or Mysterious & Atmospheric), point of view and story shape. Notes carry anything else, such as how graphic to be.
Horror tropes
Chips from the Horror genre list: haunted house, ancient curse, cosmic horror, body horror, cabin in the woods, summoning gone wrong and more.
Chapters that remember
Each chapter is written from the story bible and the earlier chapters, so the rules of the threat hold.
Subgenres
Horror is a built-in genre. For a subgenre, pick matching tropes or name it in the pitch and notes.
Psychological
Unreliable minds and paranoia; try the unreliable-narrator idea in first person.
Cosmic
Forces beyond understanding; the cosmic horror trope is in the list.
Gothic
Old houses and family secrets; describe the house in the world card.
Haunted house
A trope chip; set the house as a key location.
Body horror
A trope chip; say in the notes how graphic it should be.
Folk horror
Isolated communities and old rites; write the rites into the world rules.
How it works
- 01
Pitch
Choose Horror, pitch the story, and adjust tone, tropes and notes in Fine-tune.
- 02
Story bible
One click builds premise, title, world, cast and outline. Edit anything or regenerate it with an instruction.
- 03
Write
Generate chapters one at a time, continue from the cursor, or rewrite a passage to slow it down or sharpen a scare.
- 04
Export
Download the manuscript as DOCX, PDF, Markdown, plain text or HTML.
Questions
Can AI write genuinely scary horror?
It can draft atmospheric, tense chapters that you then sharpen. What scares readers usually comes from your revisions: use Rewrite selection with an instruction ("more dread, less gore") or edit by hand. Quality depends on the model you pick.
How does FictionAI handle scare pacing?
Pacing comes from the outline: each chapter has a summary, key events and a closing hook, and you can reorder or rewrite them before writing. There is no separate pacing tool; the outline and your notes steer it.
Does it support cosmic horror?
Yes. Cosmic horror is one of the Horror trope chips, and you can describe the entity and its rules in the world card so every chapter keeps to them.
What horror subgenres are available?
Horror is a built-in genre with its own defaults and a trope list that covers haunted houses, possession, curses, cosmic horror, body horror and more. For other subgenres, name them in the pitch and notes.
Can I create unique monsters and entities?
Yes. Put the creature in the cast (description, backstory, motivation) and its rules in the world card. Both are part of every chapter prompt, so its behaviour stays consistent.