This AU generator drops two characters into a different world and tells you who they are in it. Twenty-eight settings — coffee shop, roommate, royalty, soulmate, pirate, magic school — each with two roles and a complication worth writing about. Free, no sign-up.
Every headcanon starts somewhere. Start wherever you’re stuck — each tool runs on its own, and they all read from the same character.
Dig into a character's quirks, fears, and the stuff they'd never admit out loud.
Map out a friendship, rivalry, or slow-burn nobody asked for but everybody needed.
Drop your cast into a situation and see what falls out of character — in the best way.
Get a line that sounds exactly like them, even when you can't hear their voice anymore.
Fill in the physical and behavioral details canon left blank.
An AU — alternate universe — keeps the characters and changes everything around them. Same people, different world: the knight becomes a barista, the rivals become flatmates, the war never happened. It is the most-written form in fanfiction because it answers a question canon never will — who would they be somewhere else?
What every AU here gives you:
The roles are the part most AU idea lists leave out. “Coffee shop AU” is a setting, not a story. “One of them has never spelled the other’s name right, and neither has mentioned it in months” is a story.
Two names, a kind of AU, one click.
Keep rolling until a setting fits the pair you have in mind. The roles are written to be swapped — if the dynamic reads better the other way round, turn it round.
Real output from the generator — first rolls, not cherry-picked.
“Roommate AU. Elara labels everything in the fridge; Kael has never once read a label.”
“Royalty AU. Kael is the heir who was never supposed to inherit; Elara is the guard assigned to them as a punishment.”
“Flower shop AU. Elara reads too much into every order; Kael keeps buying apology bouquets.”
Nothing is fixed. Take the setting from one roll and the twist from another, or keep the setting and write your own roles into it.
Craft richer characters and plot twists without staring at a blank doc.
Enhance immersion with the nuanced detail canon never gave you.
Explore unseen dynamics and relationships.
Build deeper NPC personalities.
Bring your headcanons to life in art, stories, or videos.
Recent submissions from the community — categories: Humor, Angst, Romance, Adventure.
"My OC insists he doesn't have a favorite mug. He has a favorite mug. Everyone knows which one."
"She keeps the letter she never sent in the same drawer as the one she never got a reply to."
"Neither of them will admit the 'training sessions' stopped being about training three weeks ago."
28 settings across everyday, romantic, fantasy, historical and school
Two written roles per AU, not just a setting name
A complication on every roll, and an opening beat on the long ones
Works for any ship, any fandom, or two OCs of your own
Completely free, no account or sign-up required
"I've been writing fanfiction for years, and this saves me so much time. The prompts are incredibly detailed."
"Roleplaying with friends is more fun now — our characters finally have quirks that feel real."
"I didn't know how to describe my OC's personality until this generator gave me an idea I loved."
"Perfect for brainstorming relationship headcanons. We laugh, cry, and create."
Yes — free, unlimited and no account required. Roll as many as you like.
Twenty-eight settings in five groups. Everyday covers coffee shop, flower shop, bakery, bookshop, roommate, neighbours and office; Romantic covers fake dating, soulmate, wrong number, childhood friends, enemies to lovers and slow burn; plus fantasy, historical (royalty, regency, pirate, wartime, arranged marriage) and school.
Yes. Type either name, or both, and the AU is written around them. Nothing here is tied to a particular fandom — see the OC headcanon generator if you want detail about the characters themselves.
An AU changes the world; a headcanon adds a detail to the world canon already gave you. If you want the second, the headcanon generator is the tool.
