AI world building tools Write the history. Then walk into it.

Most world building tools are filing cabinets. Here, every character, city, faction, and old war becomes a lore card the storyteller recalls when its name comes up, and a LoreMap shows how they all connect. The world you build is the world you play.

Price
Free to start
Lore
Recalled by name
LoreMaps
See how it connects
Starfall ReachLoreMap6 cards
CharacterImportance

Sela Mor

Keeper of the Synod’s star charts, and the only one who knows the last chart was forged. She will not say who asked her to.

  • Sela Mor
  • the archivist
  • star charts
Use map to expand story context

The short answer

Can AI help you build a fictional world?

Yes. In LoreWeaver you write a world’s characters, places, factions, items, and events as lore cards, and the storyteller brings a card into a reply when it is pinned or when its title or one of its tags appears in the last 12 messages, so the world you design is the world you play. The AI builds a world’s premise and opening scene from a one-line idea and a card’s description from its title, a LoreMap draws how the cards connect, and on Plus and above, Emergent Lore Detection suggests new cards from the story itself. Lore cards, LoreMaps, and the Loom are free on every plan.

Updated

lore categories a world can hold, starting from the 6 built in
50
recent messages searched for each card’s title and tags before every reply
12
Loom templates for the rules your world runs on
53
tokens of story context on the largest plan
100K

Inside a world

Lore that knows when to enter the scene.

You wrote Countess Vey and the Ember Chapel into the Red Moon Marches once. Nine sessions later the chapel comes up, both cards are recalled, and the Countess answers from inside your canon.

The Red Moon MarchesSession 9
Lore in play
A cloaked warrior with a glowing spear stands on a rocky ledge, facing a spired castle above a river of fire under a blood-red moon

Castle Vharn · The chapel stair

Countess Vey

“You burned my chapel and called it justice. My grandmother raised it with the last of the red-moon silver. Tell me what justice costs, and I will tell you what you owe.”

Inside a lore card

What a lore card holds, and what each part does.

A card is a short entry the storyteller reads only when it matters. Its title and tags decide when it is called, importance settles close calls, and pinning keeps it in every reply.

Type a title and the AI can fill in the description and tags for you to edit. When you publish, any card can be hidden from players and still shape the story.

How lore is chosen for each reply
The fields of a LoreWeaver lore card and what each one does
FieldWhat it does
TitleCalls the card into a reply whenever it appears in the recent story.
CategoryCharacter, Location, Faction, Item, Event/History, Misc, or one you name, such as Spells or Noble Houses.
DescriptionWhat the storyteller reads: a few sentences on who or what this is, and why it matters.
TagsOther names for the same thing. Any one of them calls the card in.
ImportanceOne to five. Adds weight when several matching cards compete for room.
PinnedKeeps the card in every reply, named or not.
ImageA picture for the card, uploaded or, on Pro and up, generated.
HiddenChosen when you publish: players cannot read the card, but it still guides the story.

The lore builder

World building the story actually uses.

Bring a SillyTavern lorebook or a character card
01

Recall

Say the name. The lore follows.

Before every reply, each card’s title and tags are looked for in the last 12 messages and your new move. Matching cards join the reply, pinned ones always do, and the words that called a card in are marked so you can see why it came.

02

LoreMaps

See how your world connects.

Generate a map and every card becomes a node, grouped by category, with first links drawn from what the cards share: tags, family names, and each other’s names in their descriptions. Draw your own links and label them with relationship tags you name and color.

03

Discoveries

The story adds its own.

On Plus and above, Emergent Lore Detection reads your story as it grows and suggests a card for anyone or anything new it establishes. Nothing enters your lore until you keep it.

04

Card help

A title is enough to begin.

Type a card’s title and the AI fills in its description and tags from your premise and the story so far. Already keep lore elsewhere? SillyTavern World Info, NovelAI lorebooks, AI Dungeon story cards, and the lorebooks inside character cards all import.

05

The Loom

History that waits to happen.

Write threads with conditions and your world acts on its own: when the heir comes of age, the regent makes his move; when the seal breaks, the city’s card swaps to its ruined description.

06

Publishing

Open the gates.

Publish your world to the Hub and anyone can play their own copy. Cards and threads you mark hidden stay secret, and your own sessions are never shared.

From premise to play

How to build a world with AI, step by step.

  1. 01

    Start with a premise

    One idea is enough.

    Describe your world in a sentence and the storyteller builds its title, premise, tone, style rules, and opening scene, or write every field yourself.

  2. 02

    Write five cards

    Begin with what the story needs first.

    A ruler, a capital, a rival faction, an old war, and one secret. Type each title and let the AI fill in the rest, or import a lorebook instead.

  3. 03

    Map it

    Connect it, then wire it.

    Generate the LoreMap to see how the cards relate, tag the links that matter, and add Loom threads for events that should fire on their own, like a coup when the old king falls ill.

  4. 04

    Play and publish

    Walk in, then open the doors.

    Start a session to test your world from the inside. When it holds up, publish it to the Hub, and if you are on the free plan, your first published world earns 3 days of Plus.

Follow a world from premise to play

Any genre

Lore works the same in every kind of world.

All genres

Questions

Questions from world builders.

01What is AI world building?

Creating a fictional world, its people, places, factions, and history, with an AI that helps you build it and then uses it. In LoreWeaver, what you write becomes lore cards the storyteller recalls when their names come up, so you can play inside the world you made.

02Is it only a fantasy world builder?

No. Lore cards work in any genre: star systems and megacorporations, a haunted town, a single apartment block. The tone and style rules you set decide how the world is written.

03Can AI generate a world for me?

Yes. Describe an idea when you create a world and the storyteller builds its title, premise, tone, style rules, and opening scene for you to edit. Lore cards stay yours to choose, but type a card’s title and the AI fills in its description and tags, and on Plus and above, Emergent Lore Detection suggests new cards from the story.

04Can it draw a map of my world?

LoreMaps draws your lore as a relationship graph, showing which characters, places, and factions connect and how. It does not paint geographic maps, but you can attach images to lore cards, including maps you made elsewhere.

05Do LoreMap links change the story?

Only if you switch them on. With story context on, a card that joins a reply can bring its closest connections on the map along, within a small share of the lore budget. Left off, the map is simply a way to see what connects to what.

06Can I import lore I already have?

Yes. SillyTavern World Info files and NovelAI lorebooks import straight into a world’s lore, AI Dungeon story cards arrive as cards, and Tavern character cards bring their embedded lorebooks with them.

07Can other people play my world?

Yes. Publish it to the Hub and anyone can play their own copy. Hidden lore cards and Loom threads stay secret, and your sessions are never included.

08Is AI world building free?

Yes. Worlds, lore cards, LoreMaps, and the Loom are all on the free plan, along with unlimited replies from the free storyteller and 25 premium replies a day. Paid plans start at $7.99 a month and add Emergent Lore Detection, premium storytellers, and longer story memory.

For world builders

Further into the craft.

The map is blank

Every world starts with a single card.

Free to start. Write a premise, add a card, and step inside.