An AI fanfiction generator writes or continues stories set in a world you already love, using the characters, settings and tropes you give it. The real choice is how much you steer: some tools write while you read, others continue your own draft. Ten tools follow in no particular order, described from each vendor's own page.
Fan fiction has always been about taking a world you love and asking what happens next. AI tools can now help with that, from quick story prompts to writing partners that pick up your draft mid-chapter. They're very different tools, though, and the wrong one can turn a slow-burn romance into a mess of forgotten names.
The ten below are listed alphabetically and in no particular order. Every description comes from each tool's own website, read as of Oct 2026. I've left out tools whose pages have closed, and I'll explain which ones further down.
AI fanfiction tools at a glance
I checked the free plan column on each vendor's own website, as of Oct 2026. Yes means the page names a free plan, a free version or free tools, or calls the product free. Trial only means the page names a time-limited free trial. Not stated means the page I read named neither, so check the vendor's own site before you sign up.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| AI Dungeon | AI text adventure game | Playing through a story in a world you choose | Yes |
| Chai | AI character chat app | Chatting with AI characters you or others create | Not stated |
| HyperWrite | Story generator in a writing suite | Quick story drafts with characters and plot | Yes |
| NovelAI | AI storyteller and anime image generator | Long stories plus anime-style character art | Not stated |
| Novelcrafter | Novel writing software with AI | Tracking characters and writing spin-offs for fans | Trial only |
| Plot Factory | Online story planner | Planning stories and whole fictional universes | Yes |
| Squibler | AI book and novel writer | Turning an idea into a long draft by chatting | Not stated |
| Sudowrite | AI writing partner for fiction | Continuing your own draft with a fiction model | Not stated |
| Talefy | Interactive story game | Reading and playing romance and fantasy stories | Not stated |
| ToolBaz | Free AI writing tools | Continuing an existing story or setting up a roleplay | Yes |
Ten AI tools for writing and playing fan fiction
AI Dungeon
Best for: Fans who'd rather play than write, guiding every choice in open-ended adventures, custom scenarios or community-made worlds online or in the app.
Chai
Best for: Character-led stories told through chat, as its page describes a consumer platform where users create their own chat AIs.
HyperWrite
Best for: Quick drafts and fresh ideas when you're stuck, since its story generator builds stories complete with characters and plot elements.
NovelAI
Best for: Writers who want an AI that writes with them and remembers the world, plus anime-style art of characters and scenes from the same account.
Novelcrafter
Best for: Serial writers who need a story bible that tracks characters and locations, with a genre guide that covers spin-offs for your fans.
Plot Factory
Best for: Planning a fictional universe before you write, organising stories, characters and worlds online, even from your phone.
Squibler
Best for: Long fan works you'd like to draft by chatting with AI, then refine and restructure with editing tools built for long-form storytelling.
Sudowrite
Best for: Writers continuing their own draft, using Muse, a model the company says it built just for fiction, plus a chat built with novelists in mind.
Talefy
Best for: Readers who want interactive stories in genres such as fantasy romance, either playing AI-generated stories or making their own.
ToolBaz
Best for: Picking up where a story left off, as its free writing tools include a story continuer and a roleplay scenario generator.
Two old fanfiction names have shut their doors
When I checked the tools that still turn up on older fanfiction lists, Dreamily's page now reads that it has ceased service, and the novelist.ai address says the domain is for sale. Neither is on this list. NovelAI is still going, but its page title now leads with an anime image generator, with the storyteller second. So if a list you're reading still suggests a tool, open its page before you start a long story in it.
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Do you want to read, play or write?
Fanfiction tools sort neatly by how much of the story you steer.
- Prompt and read. You give a setting, a pair of characters or a trope, and the AI writes. Good for quick ideas, less good for a long story that has to stay consistent.
- Play along. Text adventure and interactive story apps let you choose what happens next, a bit like a choose-your-own-adventure book set in a world you love.
- Write with a partner. You write, and the AI suggests the next paragraph, a description or a twist. These keep your voice and suit longer works and series.
- Plan first. Story planners and story bibles keep track of characters, places and timelines, which matters when your fic runs to dozens of chapters.
If you want the plain-English version, the best AI persona generators has it.
Tips for writing fan fiction with AI
- Feed it the canon you care about. Give the AI short notes on each character's voice, relationships and the point in the story where your fic starts.
- Keep a story bible. Track names, ages, powers and places so chapter twenty doesn't contradict chapter two.
- Write the key scenes yourself. Let the AI help with transitions and description, but the moments readers come for should sound like you.
- Check each archive's rules. Fanfiction archives and communities set their own rules on AI-generated work, so read them before you post.
- Credit the source world. Fan fiction runs on goodwill, so tag the original work and respect authors who've asked fans not to write in their worlds.
If you're short of a starting point, my fantasy writing prompts make a good warm-up.
Do you make an AI fanfiction or story tool? Tool makers can ask to be considered for a featured place on this list.
My plain advice on AI fanfiction tools
If you want quick fun, an interactive story app or a simple story generator is all you need. If you're writing a long fic you care about, use a writing partner that continues your own draft and keep a story bible alongside it, so the characters stay in character. Whichever you pick, check its page is still live before you pour chapters into it.
For original stories rather than fan works, my roundup of AI story generators covers that side, and my fiction writing prompts help when you're stuck.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What is an AI fanfiction generator?
It's a tool that writes or continues stories set in an existing world, using characters and settings you describe. Some generate whole stories; others continue your own draft.
Is AI fan fiction allowed?
It depends on where you post. Fanfiction archives and communities set their own rules on AI-generated work, so check them before you publish.
Can AI continue a story I've already started?
Yes. Several tools here are built to continue your own draft, and one free tool set includes a story continuer.
Are there free AI fanfiction generators?
Some vendor pages here name a free game, a free basic plan or limited free use, shown in the free plan column. Check each vendor's own site before you start.
What happened to Dreamily?
When I checked its page, it said Dreamily has ceased service, so it's not on this list.
