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gscan2pdf vs Scans to PDF: catalog facts
gscan2pdf	Scans to PDF
Free Free open-source software packaged by Linux distributions such as Debian.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux, Command line
Scans straight to PDF or DjVu Uses SANE, so it works with many scanners	Separate compression of text and background keeps scanned PDFs small Adds an invisible OCR layer so documents become searchable
Linux only Plain, dated interface	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
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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