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Notesium

Plans and prices

Free

Free

Open source · MIT License · Linux, macOS and Windows

Every plan, in full

On the record

API
The local REST API uses JSON and exposes endpoints to create, update, delete, retrieve and list notes.notesium.com · read 15 Oct 2026
API data model
The documented note object includes filename, title, label status, incoming and outgoing links, timestamps, counts, path and content.notesium.com · read 15 Oct 2026
API stability
The API documentation calls the interface unstable and says it has no explicit versioning.notesium.com · read 15 Oct 2026
API write control
API writes are forbidden unless the daemon is started with the --writable option.notesium.com · read 15 Oct 2026
Bidirectional links
Links create outgoing and automatically discovered incoming relationships between notes.notesium.com · read 15 Oct 2026
CLI
Notesium includes a command-line interface with list, links, lines, finder, statistics, web and version commands.github.com · read 15 Oct 2026
Custom URI
Notesium documents a custom notesium:// URI protocol for opening notes and actions.notesium.com · read 15 Oct 2026
Editor
The embedded web editor supports Markdown syntax highlighting, section folding, table formatting, and Vim mode emulation.notesium.com · read 5 Oct 2026
File naming
Note filenames use deterministic eight-character hexadecimal identifiers derived from Unix epoch time.notesium.com · read 15 Oct 2026
Graph
An interactive force graph visualizes note relationships and supports search filtering, preview, zoom, and layout adjustments.notesium.com · read 5 Oct 2026
Graph view
An interactive force graph visualizes relationships and supports filtering, previews, zooming and layout-force controls.notesium.com · read 15 Oct 2026
Installation
Prebuilt binaries are provided for Linux, macOS and Windows, with SHA-256 checksum verification instructions.notesium.com · read 15 Oct 2026
Integrations
Notesium provides a Vim/Neovim plugin that uses its CLI for note finding and preview.notesium.com · read 5 Oct 2026
Intended users
The maker describes use cases including personal notes, knowledge bases, journaling, research, book writing, and workout tracking.notesium.com · read 5 Oct 2026
Knowledge models
The product is designed for Evergreen notes, Zettelkasten workflows and personal knowledge management.notesium.com · read 15 Oct 2026
Labels
A note with a one-word title is treated as a label and can organize linked notes into a taxonomy.notesium.com · read 15 Oct 2026
Latest release
GitHub lists v0.6.5 as the latest release, published 20 July, with Vim/Neovim improvements and rewritten web tab management.github.com · read 15 Oct 2026
License
The repository identifies the project as MIT licensed.github.com · read 15 Oct 2026

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