AI writing assistant
An AI writing assistant that works inside your editor
Inline suggestions appear where you write. Autocomplete offers your own characters and places as you type. Craft checks underline slips the moment they happen. Built for novels and fanfiction.
The direct answer
The assistant lives inside the editor: it drafts inline, autocompletes your world, and checks your craft as you write.
You type a direction like "she hides her blush behind her bento" and the scene arrives in your document as faded text, right where the story continues. Accept keeps it. Discard clears it. As you type a mention, @ opens your characters, # opens your places, and ! opens your lore in real time, drawn from your own world notes. The editor underlines point-of-view slips, tense breaks, and moments you tell instead of show while you write. Every suggestion fits your fiction because the AI reads your character profiles, relationships, and rules before it writes a word.
See it live
The real editor, running now
This is the studio editor itself, not a video. Pick a direction and watch the scene arrive inline, faded, until you accept it.
How it helps while you write
Inline drafting
Type a direction for the next beat. The AI drafts the scene into your document as faded text. Accept keeps it, discard clears it. Nothing enters the page until you say so.
Autocomplete that knows your world
Type @ for characters, # for places, ! for lore. Suggestions come from your own world notes, so the names you get are the names you invented.
Craft checks while you type
The editor underlines point-of-view slips, tense breaks, filter words, and moments you tell instead of show. Fix them in place, in the same document, without a second app.
Or start from a world
Real worlds with real casts
Begin inside a published world with a cast that stays in character, instead of a blank page.
Private by default
Nobody reads this but you
Your story is yours. We never train AI on your writing. Nobody sees it unless you publish it yourself. And any night you want, you can export everything as a novel or fanfiction format and take it with you.
Straight answers
Does Lunafic offer autocomplete and inline suggestions for fiction writing?
It offers both, with one honest difference from classic autocomplete tools. Inline: you type a direction for the next beat, and the AI drafts the scene straight into your document as faded text, which you accept or discard. Autocomplete: as you type a mention, @ opens your characters, # opens your places, and ! opens your lore in real time, powered by your own world notes. What it does not do is guess your next word while you pause mid-sentence. It works at the scale of scenes rather than single words, because the AI reads your character profiles and your rules first, then drafts to match them.
Is Lunafic good for writing novels?
Yes. The studio is a real document editor built for long work. Chapters keep their order, formatting is handled for you, and every draft keeps its version history, so an experiment never costs you the chapter it replaced. You can plan your story and organize chapters as the manuscript grows. When it is time to share it, export in novel or fanfiction format and take the file with you. Novelists who write in several languages get one extra thing: characters can speak their own language with the translation right under the line, and the AI keeps each voice consistent with the profile you wrote for it.
Does the AI know my characters and my world?
Yes, and that is the difference between a suggestion that fits and one you delete. Before the AI drafts a single line, it reads your world notes: each character’s profile and speech style, the relationships between them, and the rules you set for the world. Chapter 20 respects what was confessed in chapter 3. If you write in roleplay mode, there is a second layer: a character only knows what your character has earned the right to know, so secrets stay secret until your story reveals them. You teach the world once, and every suggestion after that is shaped by it.
Can I export my novel or fanfiction?
Yes. Everything you write exports in novel and fanfiction formats, and the file is yours. Your stories are never used to train AI, nobody at Lunafic reads them, and nothing becomes public unless you publish it yourself. Private by default is the whole design: the full studio, the inline drafting, the world memory, all of it works without publishing a single chapter. Write for yourself for as long as you want, and export the night you decide your manuscript is done.
Is it free to start?
Yes, with no credit card. The free tier includes the full studio with every writing format, and a fresh allowance of AI credits every month, which covers dozens of scenes. Paid plans exist for writers who finish what they start: more credits, deeper models, and higher limits. Start free tonight, draft your first scene with the inline assistant, and upgrade only when the story asks for it.
Your next chapter, drafted with you.
Open the editor, type a direction, and keep the scene if it earns its place.
No credit card required · Free tier available