Lineage — Fantasy Family Tree App

A self-contained, single-file web application for building and visualizing family trees for tabletop RPG campaigns, worldbuilding, and fiction writing.

No installation required. Open index.html in any modern browser and start building.

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Features

• Interactive Canvas — Drag-and-drop character nodes on a zoomable, pannable canvas with smooth connector lines
• Character Profiles — Track name, gender, titles, species, age, role, faction, and status (Alive, Deceased, Undead, etc.)
• 12 Relationship Types — Parent, Child, Spouse, Sibling, Adopted, Guardian, Rival, Ally, Enemy, Mentor, Apprentice, Other
• Relationship Filtering — Filter the canvas by relationship type to focus on specific connections
• Character Search — Quickly find characters by name across your dynasty
• Genetic Trait Tracking — Model hereditary disorders and conditions with automatic inheritance propagation across family lines
• Dynasty Management — Create and switch between multiple independent family trees in the same browser
• 5 Visual Themes — Necromancer, Castlevania, Vampire, Dungeon, and The Escape (noir)
• Sidebar Inline Editing — Edit character details directly in the sidebar without opening a modal
• Toast Undo — Undo accidental deletions via a temporary toast notification
• Keyboard Shortcuts — Delete selected node with the Delete key; navigate with focus controls
• Zoom Controls — Zoom in/out buttons plus fit-to-screen, in addition to scroll-wheel zoom
• Demo Mode — Load a pre-built sample tree to explore the app before building your own

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Usage

1. Download or clone this repository
2. Open index.html in a browser — no server needed
3. Create a dynasty, add characters, and define their relationships

All data is saved automatically to your browser's localStorage — no account or internet connection required after the initial page load.

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Tech Stack

• React 18 via CDN (no build step)
• Vanilla CSS with CSS custom properties for theming
• Browser localStorage for persistence
• Zero dependencies to install

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Species Presets

Human, Elf, Dwarf, Halfling, Orc, Tiefling, Dragonborn, Gnome, Half-Elf, Undead

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License

MIT — see LICENSE for details.