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Papers vs DjVuLibre: catalog facts
Papers	DjVuLibre
Free Free GNOME app, supported by donations to the GNOME Foundation.	Free Free and open source under the GPL.
Linux	Linux, Command line
Annotation and highlighting of PDFs Opens DjVu, TIFF and comic book archives	Command-line encoders, decoders and utilities for DjVu files Standalone viewer included
Linux only No full PDF text editing	Targets Unix with X11; no native Windows or macOS builds from the project Modern viewer DjView4 is a separate package
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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