Obsidian
A private and flexible knowledge base.
Keep a personal knowledge base in local Markdown files, with source editing, inline Live Preview, and a separate reading view. Link notes with backlinks, explore connections in a graph or Canvas, and organize note properties with Bases. Community plugins extend the app; optional paid Sync and Publish services add device synchronization and web publishing.
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See Obsidian in action
What is Obsidian best for?
Obsidian is a freemium Markdown tool best suited to building a connected knowledge base in files you control. It is available as Desktop app, Mobile app on macOS, Windows, Linux, iOS, Android, and its source status is proprietary.
Verified editor profile
Reviewed September 27, 2026
MarkdownList independently checked these facts against the product, its official documentation, or its public source. Missing items mean not verified, not necessarily unsupported.
Editing experience
Files and offline use
- Local Markdown files
- Folder or workspace support
- Works offline
Long documents
- Tabs or multiple documents
Output and extensions
- Extensions or plugins
At a glance
- Pricing
- Freemium
- Source
- Proprietary
- Best for
- Building a connected knowledge base in files you control
Availability
Platforms
Surfaces
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macOS