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NAPS2 vs Scans to PDF: catalog facts
NAPS2	Scans to PDF
Free The open-source application is available without a license fee.	Free Free and open source under the GPL-3.0-or-later licence.
Windows, macOS, Linux	Linux, Command line
Works with nearly any scanner protocol on Windows, macOS and Linux Built-in OCR produces searchable PDFs with no extra step	Separate compression of text and background keeps scanned PDFs small Adds an invisible OCR layer so documents become searchable
Deliberately simple; it is not a document management system OCR language packs must be downloaded separately	Color and grayscale scans need preparation in other tools for good results Linux only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.