A canon that holds, in a world you can play.

AI worldbuilding tool Lore you write once, used in every scene.

Most worldbuilding ends in a document nobody opens twice. In LoreWeaver your factions, places, and histories become lore cards the storyteller reaches for while you play, and LoreMaps shows how all of it connects.

Start free on the Hub

Try it free: 20 replies, no account
LoreMaps: On every plan
Categories: Up to 50 per world

The short answer

What’s the best AI worldbuilding tool?

LoreWeaver is a strong pick if you want a world you can also play. You write characters, places, factions, items, and histories as lore cards in up to 50 categories per world, LoreMaps draws how they connect, and the storyteller brings a card into a scene when its title or a tag comes up, or when you pin it. LoreMaps and unlimited Loom threads come with every plan, and the free plan adds 25 premium replies a day.

Updated October 3, 2026

lore categories a world can hold, named however you like: 50
starter categories, from Character to Misc: 6
Loom templates for world events, meters, and quests: 43
for LoreMaps and unlimited Loom threads, on every plan: $0

The workflow

From a blank page to a world that plays.

Four steps, one coastline. Each step shows the screen you would be on while building the Saltreach Coast, a cold harbor world where the sea’s leftovers are the law.

01
Premise
Lay the foundations.
Write the premise, tone, and style rules: the history, the geography, and how the world should sound. The storyteller reads all three before every scene.
Uses Premise · Tone · Style rules
The Saltreach CoastWorld settingsSaved
Premise
Six fishing towns on a cold northern coast. The Tidewardens claim whatever the sea gives up, and the old harbor law still decides who eats.
Tone
Salt-worn and wary, with a dry sense of humor.
Style rules
Third person, past tense. Weather in every scene. Nobody says what they mean on the first try.
02
Lore cards
Fill in the canon.
Add cards for people, places, factions, items, and events, plus categories of your own. Tag them, rate their importance, and pin the rules that must hold in every scene.
Uses Lore cards · Categories · Pins
The Saltreach CoastLore41 cards
- Faction
  The Tidewardens
  Claim all salvage until sundown.
  wardens · salvage
- LawsPinned
  Old Harbor Law
  Whatever the sea leaves on the sand belongs to the Wardens.
  law · salvage
- Character
  Ysolde Marr
  Harbormaster of Saltreach. Owes the Wardens her post.
  harbormaster · Ysolde
- Event/History
  The Drowning Winter
  The year the bay froze to the horizon.
  winter · famine
03
Play
Walk into it.
Start a session and play. Trigger tooltips on recent replies show which cards shaped them, and the context inspector shows exactly what the storyteller was sent.
Uses Trigger tooltips · Context inspector
The Saltreach CoastSession 3Lore in play
Saltreach Quay · Low tide
Harbormaster Ysolde Marr
“Tidewarden law is plain: whatever the sea leaves on the sand belongs to the Wardens until sundown. You’re holding their property, stranger.”
Lore cards in play3 of 41 cards
1. 01The TidewardensFaction. Matched by name.
2. 02Old Harbor LawLaws. Pinned, so it is in every reply.
3. 03Ysolde MarrCharacter. Matched by her tag.
Matched byNames, tags, and pins
04
Grow
Let the story add to it.
On Plus and up, Emergent Lore Detection reads the story and suggests cards for what it invents; keep the ones you like. Regenerate your LoreMap to see where they fit.
Uses Emergent Lore Detection · LoreMaps
The Saltreach CoastLoreMap5 cards
Lore discoveriesPlus and up
- Character
  Brother Callis
  Keeper of the drowned chapel. Reads the tide tables aloud at dawn.
  chapel · Callis
DismissKeep card

Tools used

The tools behind every step.

Every plan comes with five of these six, the free plan included. The other names the plan it starts on.

01
Lore cards
Lore that shows up on cue.
A card joins a reply when it is pinned or when its title or a tag appears in recent messages. Important cards rank first, so a crowded scene still gets the canon that matters.
Every plan
02
Categories
Your taxonomy, not ours.
Worlds start with Character, Location, Faction, Item, Event/History, and Misc. Add Spells, Noble Houses, or Starships, up to 50 per world, and reorder them as the canon grows.
Every plan
03
LoreMaps
See the whole web.
An interactive graph of every card, with links inferred from tags, mentions, and shared scenes, plus links you draw and label yourself. Related cards gather into named clusters.
Every plan
04
The Loom
Rules that fire on their own.
Turn world logic into IF→THEN threads: when the eclipse comes, swap the temple’s card; when a faction falls, set a flag. No code, and unlimited threads.
Every plan
05
Emergent Lore Detection
Canon the story wrote.
It reads your sessions and suggests cards for the people, places, and things the storyteller invents. Nothing joins your lore until you keep it.
Plus and up
06
Imports
Bring your old notes.
Import SillyTavern World Info, NovelAI lorebooks, AI Dungeon story cards, and Tavern character cards, then keep refining them here.
Every plan

FAQ

AI worldbuilding questions, answered.

01What is AI worldbuilding?

Using AI to help invent and keep track of a fictional world: its people, places, history, and rules. On LoreWeaver the lore you write is also used live, as the storyteller plays scenes in that world.

02How is this different from a notes app or a wiki?

Your notes do work. Lore cards feed the storyteller during play, LoreMaps finds connections between them, and the Loom can change lore when story events happen.

03Can I import lore from other tools?

Yes. LoreWeaver imports SillyTavern World Info, NovelAI scenarios and lorebooks, AI Dungeon story cards, FictionLab, Tavern character cards, and its own JSON exports.

04Will the AI write lore for me?

It can help. Generate a card’s description with AI from the Lore tab, and on Plus and up, Emergent Lore Detection suggests new cards from your story for you to keep or dismiss.

05Can other people explore my world?

Yes, if you publish it. Published worlds appear on the Hub with a content rating, and each player gets their own copy. Unpublished worlds stay private.

06Is the worldbuilding tool free?

Yes. Worlds, lore cards, LoreMaps, and unlimited Loom threads are all on the free plan, which also includes 25 premium replies a day for playing in what you build.

Other ways to create