URL
FreeFree/Paid
FreeFree tier
Inputs: text, fileOutputs: text, file
About URL
Obsidian is a free and flexible note-taking and knowledge management application designed to help users organize their thoughts and ideas. It stores notes privately on the user's device, allowing for quick access even offline, and uses open file formats to ensure long-term data ownership and portability. The app supports linking between notes to create a personal wiki-like structure, and offers thousands of plugins and themes for customization. Obsidian is available on multiple platforms including Windows, macOS, Linux, Android, and iOS, with additional paid services for sync, publishing, and enterprise use.
Key Features
Private, offline-first note storage on device
Open file formats for data portability
Bidirectional linking between notes
Graph view to visualize connections
Thousands of community plugins and themes
Cross-platform support (Windows, macOS, Linux, Android, iOS)
Optional paid sync and publish services
Pros & Cons
Pros
- Free core app with no usage limits
- Data stored locally and privately
- Highly customizable via plugins and themes
- Uses open file formats (Markdown) to avoid vendor lock-in
- Active community and extensive plugin ecosystem
Cons
- Sync and publish features require paid subscriptions
- Steep learning curve for new users
- Plugin quality and compatibility can vary
- No built-in real-time collaboration (requires third-party solutions)
Best For
Personal knowledge management and note-takingJournaling and daily notesProject management and task trackingResearch and reference organizationWriting and creative ideation
FAQ
Is Obsidian completely free?
The core Obsidian app is free to download and use with no limitations on features or storage. However, optional services like Obsidian Sync and Obsidian Publish require a paid subscription. Exact pricing should be verified on the official website.
Can I use Obsidian offline?
Yes, Obsidian stores notes locally on your device, so you can access and edit them without an internet connection. Sync features require internet access.
What file format does Obsidian use?
Obsidian uses Markdown files (.md) by default, which are plain text and open format. This ensures your notes remain accessible even if you stop using Obsidian.
Is my data private in Obsidian?
Obsidian stores your notes locally on your device, and the company states that no one else can read them, including Obsidian. If you use Obsidian Sync, data is encrypted. Privacy details should be reviewed on the official site.
Does Obsidian support plugins?
Yes, Obsidian has a large ecosystem of community plugins and themes that extend functionality. Plugins can be installed directly from within the app.
On which platforms is Obsidian available?
Obsidian is available for Windows, macOS, Linux, Android, and iOS. The app can be downloaded from the official website or app stores.