Jylos

Local-first knowledge management for Markdown notes, wiki-links, backlinks and knowledge graphs.

Open-source desktop app for Windows, macOS and Linux. Your notes stay local. No accounts, no cloud backend, no telemetry.

MIT License Java 21 JavaFX 23 Local-first Open Source Windows · macOS · Linux
Jylos editor and preview

Get Jylos

Direct download links for every platform. All packages are built from the same source.

macOS
Apple Silicon
Linux
Linux
x64 · deb
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Built for knowledge work

A powerful toolkit that stays out of your way.

Markdown Editor

Live syntax highlighting, side-by-side preview, GFM tables and KaTeX math.

Wiki-links

[[autocomplete]], backlinks panel, click-to-open navigation between notes.

Knowledge Graph

Interactive force-directed graph. Zoom, pan, drag nodes, local neighbourhood views.

Kanban Boards

Task boards inside notes with drag-and-drop, WIP limits, and column colors.

Git Sync

Stage, commit, push and pull from a unified panel. Full Git integration.

AES-256 Encryption

Encrypt note bodies with AES-256-GCM behind a master password.

Storage Freedom

SQLite database or plain Markdown vault. Switch anytime, your choice.

Plugins & Themes

Plugin JARs, Mermaid diagrams, CSS themes, and a plugin manager.

Advanced Search

Operators, date shorthands, command palette and quick switcher.

Workspaces

Save and restore open tabs, view state and layout per context.

See Jylos in action

Click any image to expand it.

Knowledge graph
Write notes in Markdown and visualize Mermaid diagrams in real time
Mermaid diagrams
Interactive knowledge graph with customizable visualization settings
Kanban board
Navigate thousands of connected notes through a scalable graph view
Git Sync and search
Customizable workspace with notes, navigation and live preview
Git Sync and search
Organize tasks and projects with built-in Kanban boards

Built differently

A knowledge tool designed for people who care about where their data lives.

Local-first

Your notes live on your disk. SQLite or plain Markdown files — always yours.

Open Source (MIT)

Free forever. Audit the code, modify it, contribute back.

Markdown-native

Plain text Markdown with YAML frontmatter. No proprietary format lock-in.

No Account Required

No sign-up, no login, no user database. Just open the app and write.

No Telemetry

Zero usage tracking. No analytics, no data collection of any kind.

Plugin System

Extend Jylos with external JARs. Built-in Mermaid diagram support.

Knowledge Graph

Visualize connections between notes. Interactive, zoomable, local and global views.

Cross-platform

Windows, macOS and Linux. Native installers built with jpackage.

Your data, your rules

No servers. No accounts. No nonsense.

Stored Locally

Everything lives on your device in SQLite or plain Markdown files.

No Accounts

No sign-up, no login, no user database.

No Cloud Backend

There is no server to call, ever.

No Telemetry

Zero usage tracking or analytics.

Free and open source, forever

Jylos is MIT-licensed, built with Java 21 and JavaFX 23. Contributions, feedback and pull requests are welcome.

MIT License Java 21 JavaFX 23 Maven 3.9+ SQLite
Contribute on GitHub