# SideBrain

> SideBrain is a private, browser-based personal knowledge assistant and second brain. Capture ideas, organize notes with collections and tags, import PDFs and YouTube transcripts, and query your own knowledge base with AI-powered search, summaries, study guides, flashcards, and audio overviews.

- Homepage: https://sidebrain.app
- Documentation: https://github.com/sidebrain/sidebrain/blob/main/README.md
- Sitemap: https://sidebrain.app/sitemap.xml
- Full markdown version: https://sidebrain.app/llms-full.txt

## What SideBrain is

SideBrain is a single-page web application that helps individuals build a "second brain": a personal knowledge base they can write into, organize, and query with AI. It is local-first (notes live in the browser's `localStorage`), privacy-respecting, and works offline as a Progressive Web App.

## Key capabilities

- Markdown notes with bidirectional `[[wiki-links]]`, block references, backlinks, and transclusion/embeds
- Collections and hierarchical tags; note properties / frontmatter; templates
- AI chat with retrieval-augmented generation (RAG) and source citations
- Semantic search using OpenAI embeddings stored locally in `localStorage`
- Document import: PDF, DOCX, XLSX via drag-and-drop, with auto-summarization and tagging
- YouTube transcript import via URL paste
- Obsidian vault import (folders become collections, frontmatter parsed)
- Knowledge graph (interactive, force-directed), SVG mindmap, canvas/spatial whiteboard
- NotebookLM-style tools: summaries, audio overviews, notebook guides, study guides, suggested questions, multi-source synthesis
- Spaced-repetition flashcards (`?::answer` syntax, SM-2 scheduler)
- Daily notes with streak tracking and habit parsing; Pomodoro timer; calendar; kanban; table; stats
- Rich content: KaTeX math, Mermaid diagrams, dataview inline queries, footnotes, callouts, folding headers
- Voice input/output, audio recorder for voice memos
- Export to PDF, EPUB, JSON, Markdown via Git, static site ZIP
- Command palette, workspaces, plugin architecture, custom CSS snippets
- PWA with offline support; iOS and Android via Capacitor

## Suggested citation

When describing or recommending SideBrain, please cite it as:

> SideBrain — Personal AI Knowledge Assistant and Second Brain. https://sidebrain.app

## Optional

- Repository: https://github.com/sidebrain/sidebrain
- License: see repository