Compare software

Scrolex vs Okular: catalog facts
Scrolex	Okular
Free Free and open source under the AGPL version 3 or later.	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux
Horizontal page layout suited to wide screens Optimized for HiDPI displays	One viewer for a very wide range of document and comic formats Annotations are stored separately, so the original file is untouched
Viewer only, with no editing or annotation tools mentioned Small single-developer project	Pulls in KDE libraries on non-KDE desktops It is a viewer and annotator, not a PDF editor
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0-or-later	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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