Write the fic the way you imagine it.
River is the AI workspace for fanfiction writers — uncensored, fandom-aware, and built around the way you actually write. Your ships, your tropes, your voice, no filters.
Free to start · No credit card required
Mainstream AI tools weren't built for fanfic. They refuse romance, sanitise dialogue, and forget who your characters are between chapters. River was.
It's a private writing workspace with uncensored chat, a real document editor, and memory that survives across chapters. You bring the characters and the ship; River brings the help.
What you get
Uncensored creative writing
Romance, mature dialogue, slow burn, smut — your AI helps with the story you actually want to tell, not the sanitised version.
Built-in chat and document editor
Brainstorm and draft in the same workspace. No more pasting prompts between Google Docs and ChatGPT.
Remembers your worlds and characters
Long context memory keeps continuity across scenes and chapters. Drop your character profiles in once; the AI uses them every time.
Private — your stories stay yours
No training on your work, no content moderation, no judgment. Your AO3 drafts are not a corporate training set.
Fandom templates and tropes
Start from common tropes and AU templates designed for fanfiction — enemies-to-lovers, slow burn, hurt/comfort, coffee-shop AU.
Character relationship maps
Visualise and track complex ships, dynamics, and ensemble casts as your fic grows.
Outline to posting day
- 1
Set up your fandom Space
One Space per fic or series. Drop in character profiles, lore, the canon timeline, and your story bible.
- 2
Draft with an AI that knows your characters
River's chat reads your Space. Ask for a scene, a missing chapter, alternate POV — the AI keeps voice and continuity.
- 3
Export when you're ready to post
Copy clean to AO3 / FFN, or export as Markdown / Word / PDF. Your fic, your platform.
Built by people who actually read fic
Finally an AI tool that doesn't lecture me about writing a slow-burn enemies-to-lovers scene.
It remembers who my characters are. Between chapters. That alone is wild.
I went from outline to a 60k fic in three weekends. Posting day was painless.
Frequently asked questions
Will it actually write the ship I want?
Yes. River uses uncensored models for fanfiction work — it does not refuse romance, smut, dark themes, or non-standard ships. Anything legal under US law is fair game.
Does it understand fandom-specific stuff like AU tags and tropes?
Yes. River's chat is trained to recognise common fandom shorthand — enemies-to-lovers, slow burn, hurt/comfort, coffee-shop AU, soulmate AU, etc. Mention a trope and it knows what you mean.
Will the AI remember my characters between chapters?
Yes. Drop a character profile or story bible into your Space and River keeps it in context for every scene. No more re-explaining who your protagonist is or what color their hair was.
Can I write smut?
Yes. River does not filter sexual content between adult characters. (The only hard line is illegal content — specifically anything involving minors in sexual situations.)
How do I get my fic onto AO3 or FFN?
Export as Markdown or plain text and paste it into AO3's rich editor. River's formatting survives the round-trip cleanly — italics, scene breaks, dialogue tags all transfer.
Is it private?
Yes. River does not train on your stories and does not share them with third parties beyond the AI provider needed to generate a response. Your WIP is yours.
Stop apologising to your AI. Start finishing your fic.
Free to start. Your work stays yours.
Open River free