TonerGuard: PDF Color Detector

TonerGuard is a blazing-fast, privacy-first browser extension that analyzes your PDF documents to instantly detect exactly which pages contain colour and which are strictly black-and-white. Many multi-page documents contain only a few colour elements. TonerGuard automates the sorting process. With a single click, the extension scans the active document and generates formatted print ranges (e.g., 1-5, 8, 12-20). Users can paste these ranges directly into their system's print dialog, confidently routing monochrome pages to cost-effective black-and-white printers. Key Features - Lightning Fast: Powered by a multi-threaded background worker pool, TonerGuard scans massive documents in seconds without freezing your browser tab. - 100% Private & Secure: Your documents never leave your computer. All pixel scanning happens locally on your machine with zero cloud uploads, zero data tracking, and total peace of mind for sensitive enterprise documents. - Smart Page Grouping: Automatically groups consecutive pages into clean, copy-pasteable ranges. - Works Offline: No internet connection required to scan local files. What's New in Version 1.1 - Google Drive & Secure PDF Support - Improved Performance - Reduced Memory Usage