MindBook is a productivity web app that combines an XMind-like mind map editor with a Notion-like knowledge layer. Use the mind map canvas to capture and structure ideas with keyboard-driven editing, automatic tree layouts, pan and zoom, focus mode, and import/export. Attach Markdown notes to nodes, or create first-class Markdown pages with WikiLinks, backlinks, tags, a table of contents, callouts, Mermaid diagrams, and footnotes. Browse your knowledge with a graph view, tag view, backlinks panel, templates, daily notes, and bookmarks. Search is unified across mind map nodes, pages, and sources. AI chat streams answers and can summarize text into a mind map, expand branches, and rewrite notes. Supported formats: Markdown, JSON, SVG, PNG, PDF. Localized in 12 languages.