Stop managing knowledge. Start using it.
Zirn keeps your knowledge structured on your device and uses AI to help you search, summarize, recall, and get source-grounded answers across your own files.
context that lasts
When you add PDFs, articles, and notes, Zirn keeps more than the files. It keeps how they connect, what you were working on, and why they mattered. At the center is the .brain file — the system that links your notes, sources, preferences, and relationships so you can pick up where you left off without starting over.
Home for every vault
Most note-taking apps leave you with a collection of pages. Zirn turns them into a living knowledge base. As your vault grows, Zirn continuously compiles summaries, maps relationships between ideas, and builds a Home page that explains what your knowledge contains. Instead of searching through folders and forgotten notes, you can see the bigger picture, explore connections, and ask questions across everything you've learned.
Home gives each vault a clear overview: a living summary at the top, a knowledge map for relationships, and page summaries for the notes that matter most.
ask across your library
Ask about PDFs, notes, articles, and saved sources instead of hunting through folders. Zirn answers from your vault, so you spend less time searching and more time thinking.
search by meaning
Zirn searches by meaning, not just keywords. Surface the note, page summary, or source that answers your question, even when you only remember the idea.
Flashcards that remember where every idea came from.
Generate flashcards directly from your notes, PDFs, and documents. Every card stays connected to its original source, so you can revisit the context whenever you need it. Learn from your own knowledge—not generic AI responses.
see the connections
The knowledge map shows how notes, sources, topics, and research threads relate. Spot links you would have missed when everything lived in separate files.
FAQ