
Topic-based tab and bookmark manager with notes and org-mode sync
BrainTool is a browser extension that organizes your tabs, bookmarks, and notes into a hierarchical topic tree. Instead of flat bookmark folders, you build a structured knowledge map where every saved page has context — notes, to-do status, and a place in your personal topic hierarchy. Data syncs to a plain-text org-mode file on Google Drive or locally, keeping you in control of your information.
Organize bookmarks and tabs into a hierarchical topic tree with drag-and-drop
Open, close, and navigate tabs, windows, and tab groups directly from the topic manager
Add notes and context to any saved page within the topic hierarchy
Mark bookmarks and tabs as tasks with TODO and DONE status
Data stored in plain-text org-mode format, synced to Google Drive or local file
Save and restore complete browser sessions with all tabs and windows
Search across all links, descriptions, and notes
Build a structured topic tree for research projects with notes alongside each source
Create a personal knowledge base from web resources organized by topic hierarchy
Track reading lists and web-based tasks with TODO/DONE annotations
Save and restore complete browsing sessions for different projects or contexts

AI-native training platform for high-impact corporate learning

AI-native learning platform that unifies LMS, LXP, and knowledge management

Your AI-Powered Personal Knowledge Assistant for Mac, iPhone & iPad

Visual infinite canvas workspace with built-in browser and AI auto-tagging
Import existing bookmarks and sync with browser bookmarks bar
Visual display of Chrome tab groups within the topic tree
Powerful keyboard commands for fast navigation and organization
Sync browser bookmarks with org-mode files for users already in the Emacs ecosystem

Where knowledge begins