ScanExtension - E-Book & PDF Scanner

ScanExtension is a high-performance productivity and accessibility extension designed for students, researchers, and educators to streamline reading notes, study workflows, and offline access to online e-books and web documents. The extension automates page navigation, captures crisp high-resolution viewports, and compiles them directly into a unified, searchable PDF with an invisible text layer. KEY FEATURES: 1. Automated Page & Chapter Scanning - Smoothly scrolls or turns pages across digital textbooks and online readers. - 4 flexible scanning modes: Full Chapter (auto-detects chapter completion), Continuous Scan, Subchapter (stops at next major heading), and Fixed Page Count. - Supports both vertical scrolling readers and horizontal spread page-flipping. 2. Searchable PDF with Invisible Text Layer - Accurately aligns an invisible text layer over rendered text on each page. - Enables native Cmd+F / Ctrl+F searching, column-aware text selection, and direct copying into Word, Google Docs, or Notion. 3. Quick Snippet & Cropping Tool - Press Option+Shift+C (Mac) or Alt+Shift+C (Windows) to activate the snipping overlay anytime. - Click and drag a bounding box around diagrams, charts, formulas, or text blocks. - Instant 1-click clipboard copy (Cmd+V), text extraction, or high-definition PNG export. 4. Review Gallery & Page Management - Preview thumbnail captures before generating the final PDF. - Delete accidental blank pages or chapter boundary spreads with a single click. - Choose between Maximum Quality (300 DPI) and Compact Web Size (150 DPI). 5. 100% Private & Client-Side - All image rendering, OCR text alignment, and PDF compilation execute locally inside your browser session. - Zero data collection, tracking, or transmission to third-party servers.