Netherstone

[Netherstone. Your knowledge, set in stone.]

Netherstone is a free, open-source desktop app for documents and drawings. Each document, called a shard, is a Markdown file in a folder you pick.

Download

Get the latest version for Windows, macOS or Linux from Releases.

On Windows, the installer shows "Windows protected your PC". Click More info, then Run anyway. Windows shows this because the installer isn't code-signed yet. We plan to sign it in a future version.

Features

• An editor that formats Markdown as you type
• Search, @ links and #tags
• Drawings, images, PDFs, audio and video
• A Gallery of every attachment in your vault
• Charts from tables, and an Overview of your vault
• Every version of a shard or drawing in History
• Import from Word, PDF, HTML, Markdown and CSV, and export to PDF, Word or HTML
• Open folders and files from the terminal (netherstone .) or your file manager
• Free sync through your own GitHub account
• Light, Dark and three more themes

[Netherstone with a shard open in the editor]

AI apps

Netherstone has a built-in MCP server, so your AI apps can search your vault, read and write shards, fix links, edit drawings and tables, and go back through History. It's off until you turn it on:

1. Open Settings > AI apps and turn on Connect your AI apps.
2. Pick the vaults AI apps may use.
3. Click Connect next to your app, then restart it. For any other app, click Copy setup and paste it into that app's MCP settings.

AI apps can't delete anything, and every change they make is saved in History first, so you can undo it.

Building from source

You need Node.js 22+, pnpm 11, Rust and the Tauri prerequisites for your OS.

pnpm installpnpm tauri dev     # run the apppnpm test          # run the testspnpm tauri build   # build an installer

The editor also has browser tests. Build the frontend once, then run them in a real Chromium (the first run downloads it):

pnpm exec vite buildpnpm exec playwright install chromiumpnpm test:e2e

Learn more

Architecture · Attachments · Git sync

Community

Questions, ideas and feedback are welcome in Discussions. To report a bug, open an issue.

License

GNU GPL-3.0