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ParaPara vs QuickViewer: catalog facts
ParaPara	QuickViewer
Free Free and open source under GPL-3.0.	Free Free software under GPLv3.
Linux	Windows, macOS, Linux
Single, two-page spread, and continuous viewing modes Supports right-to-left and left-to-right page turning	Opens image archives directly Supports two-page comic viewing
Available for Linux.	Linux users need to build QuickViewer from source.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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