Altheryn is a desktop app for writers and worldbuilders. It stores your notes as plain Markdown files, links them with wiki-style references, and maps out connections as a living knowledge graph.
Think of it like Obsidian, built specifically for authors. You write notes about your characters, locations, lore, and plot threads. You link them together. Altheryn keeps track of everything and shows you how it all connects.
Every note is a plain .md file sitting in a folder on your machine. No proprietary format, no subscription, no cloud required.
Everything in one place. Nothing you don't need.
Write in plain Markdown with a live preview toggle. Headings, lists, task checkboxes, code blocks, tables, and blockquotes all render cleanly.
Type [[Note Name]] anywhere in a note to link it to another. Autocomplete shows matching notes as you type.
See all your notes as an interactive force-directed graph. Click any node to open it. Drag nodes to rearrange. Zoom and pan freely.
Organize notes into author-friendly categories like Characters, Locations, Lore, and Plot. Nest them into folders for scenes or story arcs.
Every note shows which other notes reference it. Discover hidden connections between your ideas without having to search manually.
Drag any tab into the right panel to work on two notes side by side. Useful for referencing a character sheet while writing a scene.
Search across all your notes instantly using SQLite FTS5. Results show the note title, category, and icon so you can find things fast.
Your notes live as regular .md files in any folder you choose. Open them in any editor. Back them up however you like.
No setup wizard, no onboarding flow. You pick a folder and it works.
.md files you can read, copy, or open in any other editor.[[Note Name]] to reference other notes inline. Altheryn tracks every link and builds a map of your world automatically.Free to download. No account needed. Your notes stay on your machine.