Turn any set of notes into a powerful database
Store notes on your device, so you can access them quickly, even offline. Use hundreds of plugins and themes, to fit your way of thinking.
Obsidian stores all notes locally as plain text Markdown files on the user's device with no telemetry collection. Data remains inaccessible to Obsidian even when using optional Sync service, which uses AES-256 end-to-end encryption.
Obsidian enables users to create links between notes, visualize relationships via graph view, and organize thoughts into a personal Wikipedia. Open file formats and local storage ensure long-term data ownership and portability.
Obsidian Publish converts notes into fast, SEO-optimized websites with customizable themes, domains, and password protection. Users can instantly publish from the app without technical knowledge.
Obsidian Sync provides end-to-end encrypted synchronization across devices with version history, selective sync by file type, and fine-grained control over which files sync to which devices.
Obsidian offers thousands of community plugins and themes plus an open API, allowing users to tailor the app's interface, functionality, and behavior to their unique workflow without vendor lock-in.