KeepKnow: highlights + PDF/Markdown Export
Extension Actions
Select and export custom webpage content as PDF and Markdown; highlight text with a fluorescent marker.
KeepKnow — Highlight, pick, and save the web
KeepKnow is a browser extension for reading and personal knowledge management. A lightweight sidebar on any webpage lets you highlight text, pick custom content blocks, export to PDF / Markdown / PNG, and archive everything in your personal knowledge library.
Highlights
Turn on with Alt+4, the sidebar pen tool, or right-click → Highlight selection
Selections persist across page reloads; change color, copy, or remove anytime
Pick & export
Enter pick mode from the sidebar or right-click → Start export
Chrome-style element targeting; click to select, Shift+drag to multi-select
Trim selection edges; scroll while picking without losing your clip
Export PDF, Markdown, or PNG with an editable filename to EXP_Downloads/
Knowledge library
Open from the toolbar icon, sidebar, or right-click menu
Exports sync automatically; folders, full-library search, breadcrumbs
Drag to move items; resizable sidebar
Preview PDF/PNG; edit Markdown in edit / preview / split modes
TOC navigation and in-preview highlights for Markdown
Open source page, rename, or delete (library only — local downloads are kept)
Privacy
Highlights and library data stay on your device (IndexedDB)
No server upload; overlay runs on the top-level page only
Install → visit any page → highlight or export → manage in your knowledge library.