Worldbuilding (World Anvil, Campfire, LegendKeeper)

Worldbuilding tools are the wiki for your fictional universe: characters, places, magic systems, languages, timelines, factions. They overlap heavily with TTRPG campaign tools — see game-design-narrative for the tabletop-flavoured side. For plot-structure tools see writing-author-plotting-tools; for the pure note-taking layer see self-hosted notes & wikis.

Dedicated worldbuilding apps

• ★ ★ World Anvil — paid + free tier; web-based; ★ ★ the most-used worldbuilding wiki in 2024-26. Article templates (character / location / item / spell), maps, timelines, family trees, calendars, guild communities. Free tier is workable; paid unlocks more articles, custom CSS, private worlds. Big community.
  • https://www.worldanvil.com/
• ★ Campfire — paid + free; web; the World Anvil competitor with a more polished / writerly UI; modular subscription (buy only the modules you use: Characters / Manuscript / Timelines / Maps / etc.).
• LegendKeeper — paid; web; ★ TTRPG-flavoured (D&D campaigns, Pathfinder, homebrew); modular drag-and-drop world maps. Excellent for GMs.
• Scabard — paid + free; TTRPG-flavoured; older; massive community.
• WorldScribe / The Plot Bunny — niche.
• Notion templates — paid + free; "fantasy worldbuilding template" is a small industry; cheap entry. See writing-notion-templates.

Free / OSS / markdown-native (the power-user path)

• ★ Obsidian + Excalidraw + Excalibrain + Dataview — free for personal; the serious worldbuilder's setup:
  • Excalidraw plugin — hand-drawn world maps inline.
  • Excalibrain plugin — graph navigation across notes.
  • Dataview — query-driven character / location lists.
  • Templater — character / location templates with frontmatter.
  • Map View plugin — geographic notes.
  • Folder of .md files + git = lifetime backup.
• Trilium / TriliumNext — free OSS; tree-shaped notes; some writers prefer over Obsidian for hierarchy. See self-hosted notes & wikis.
• AFFiNE / AppFlowy — free OSS; Notion-shape; same page.
• Logseq — free OSS; outliner; same page.

Map-making for fantasy worlds

• Inkarnate — paid + free tier; web-based fantasy map maker; the common pick.
• Wonderdraft — paid one-time; desktop fantasy mapper; great for regional / world maps.
• Dungeondraft — paid one-time; same author; battle-map / dungeon level.
• Azgaar's Fantasy Map Generator — free OSS web; ★ procedural fantasy world generator; export to Foundry VTT.
  • https://github.com/Azgaar/Fantasy-Map-Generator
• Watabou's One-Page Dungeon / Medieval Fantasy City Generator — free; web procedural generators.
• Other Eyes / Dungeon Scrawl — free + paid; quick-sketch dungeon maps.

Language / conlang tools

• PolyGlot — free OSS; conlang construction (phonology, grammar, lexicon).
• Vulgar — paid; auto-generates a fictional language with vocab + phonology.
• ConWorkShop — free; conlanger community.
• Conlanger's Phonology Applet — free.

Timelines / family trees / calendars

• Aeon Timeline — paid; see writing-author-plotting-tools; custom fantasy calendars are its specialty.
• Familinx / Familytree.JS / Family Echo — free + paid; family-tree visualizers.
• Fantasy calendar generators — included in World Anvil / LegendKeeper.

TTRPG-adjacent (link)

• See game-design-narrative for tabletop / campaign tools (Foundry VTT, Roll20, Obsidian Portal).

Pick this if…

• Most popular polished web app: World Anvil (★ ★).
• Modular, polished, writerly: Campfire.
• TTRPG GM: LegendKeeper or Foundry VTT.
• Markdown power user / future-proof: Obsidian + Excalidraw + Dataview.
• Fantasy world maps: Inkarnate (web) or Azgaar's generator (free / OSS).
• Conlang: PolyGlot.