Your Personal Knowledge Graph
A powerful, web-based note-taking application that transforms your thoughts into an interconnected network of ideas. Write in markdown, link your notes, and visualize your knowledge.
Powerful Features
Everything you need to build and navigate your knowledge base
Advanced Markdown Editor
Write with a powerful CodeMirror-based editor supporting full markdown syntax, syntax highlighting, live preview, and math equations with KaTeX.
- Live markdown preview
- Syntax highlighting
- Code blocks with language support
- Math equations (LaTeX/KaTeX)
- Auto-save and version history
Wiki-Style Linking
Connect your thoughts with bidirectional links using double bracket syntax. Build a network of interconnected ideas that evolve with your thinking.
- Double bracket [[syntax]]
- Automatic backlink tracking
- Link autocomplete
- Folder-aware linking
- Broken link detection
Interactive Graph View
Visualize your entire knowledge base as an interactive network graph. Discover hidden connections and explore relationships between your notes.
- Force-directed graph layout
- Interactive navigation
- Filter by tags and folders
- Real-time updates
- Zoom and pan controls
Local File Storage
Your notes are stored as plain markdown files on your local filesystem. Full ownership, complete privacy, and compatibility with other tools.
- Plain text markdown files
- File System Access API
- Electron desktop support
- External file watching
- No vendor lock-in
Hierarchical Tags
Organize notes with a flexible tagging system. Use nested tags to create hierarchies and filter notes by multiple criteria.
- Hashtag #syntax
- Tag autocomplete
- Nested tag support
- Tag-based filtering
- Tag statistics
Powerful Search
Find anything instantly with full-text search across all your notes. Support for boolean operators and advanced filtering.
- Full-text search
- Boolean operators
- Tag and folder filters
- Search history
Bidirectional Text Support
Gracefully renders mixed bidirectional text without messing up the visual order of the sentence.
No-Blink Cursor
By default, the cursor does not blink. No need to search for settings to disable the annoying blink. Enjoy a calm, distraction-free writing experience.
Our Philosophy
π§ Think in Networks, Not Hierarchies
Your thoughts don't exist in isolation. They connect, branch, and weave together in complex ways. Obsisian embraces this reality with bidirectional linking and graph visualization, letting you build a true knowledge network.
π Own Your Data
Your notes are stored as plain markdown files on your local file system. No cloud lock-in, no proprietary formats, complete privacy. Your knowledge belongs to you, accessible with any text editor, version controlled with Git, backed up however you choose.
β‘ Speed & Simplicity
Note-taking should be frictionless. Obsisian is built for speed with local-first architecture, instant search, and a clean, distraction-free interface. Write in plain markdown, no learning curve required.
π Free & Open
Knowledge tools should be accessible to everyone. Obsisian is completely free with no premium tiers or feature paywalls. Use it in your browser or download the desktop app for Windows, Mac, or Linux.
Get Started
Everything you need to start building your knowledge graph
Quick Start
- Visit app.obsisian.com
- Select a folder on your computer to use as your vault
- Create your first note with the
+ New Notebutton - Start writing in markdown!
Creating Links
Link notes together using double brackets:
[[Note Title]]
For notes in folders, include the path:
[[Folder/Note Title]]
Links autocomplete as you type. View backlinks in the sidebar to see which notes reference the current note.
Using Tags
Add tags anywhere in your notes with hashtags:
#project #work/meeting
Use nested tags with forward slashes to create hierarchies. Click any tag to filter notes.
Keyboard Shortcuts
- Cmd/Ctrl + N - New note
- Cmd/Ctrl + P - Quick switcher
- Cmd/Ctrl + F - Search
- Cmd/Ctrl + G - Open graph view
- Cmd/Ctrl + E - Toggle edit/preview
- Cmd/Ctrl + \\ - Toggle sidebar
Markdown Guide
# Heading 1
**bold** *italic* ~~strikethrough~~
- Bulleted list
1. Numbered list
- [ ] Task list
```javascript
code block
```
Desktop App
Obsisian is also available as a desktop application for Windows, Mac, and Linux.
The desktop app provides:
- Native file system access
- Automatic file watching
- External editor integration
- Better performance
Download instructions coming soon!
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>> THE REAL STORY
// Why This Exists
Let's be honest. This app exists because of frustration. Real frustration.
$ Need to access notes EVERYWHERE.
$ Want it to work OUT OF THE BOX. No installing apps.
$ Need to access personal notes even at work (corporate
networks, you know).
$ Tired of editors MESSING UP bidirectional text. Here?
Renders gracefully. By default.
$ Don't want to worry about privacy. Out-of-box encryption
on remote (for sync).
$ OBSESSED with pure text files. Local filesystem. Simple.
Intuitive.
$ And seriously... who decided cursor blinking was a good
idea?! Not doing that here.
// The Philosophy
This is NOT to replace Obsidian.
This is a simple, distraction-free, intuitive thing that does ONE THING and does it WELL:
> Just take notes and have them with you.
No fiddling around. No complexity. No bloat.
// What We're Obsessed With
- [β] Pure text files (always)
- [β] Local filesystem storage (you own it)
- [β] Access anywhere, anytime (web-based)
- [β] No installation required (just works)
- [β] Works on corporate networks (because life)
- [β] Bidirectional text that doesn't suck
- [β] Privacy-first (encryption by default)
- [β] No blinking cursor (distraction-free)
- [β] Simplicity over features
// Example: Bidirectional Text
Most editors mess this up. We don't:
// It just works. No settings. No plugins. Just... works.
// The Cursor Thing
Seriously though, who decided that a blinking cursor was a good UX decision??!!
It's distracting. It's annoying. It serves no purpose.
Here, it doesn't blink. By default. You're welcome.