Compare software

PDF4QTOkular
Free

Free and open source; donations are accepted through GitHub Sponsors.

 Free

Free and open source under the GPL.

Windows, Linux, Command line Windows, macOS, Linux
  • Viewing and editing applications in one project
  • Command-line tool for scripted PDF work
  • One viewer for a very wide range of document and comic formats
  • Annotations are stored separately, so the original file is untouched
  • No macOS version
  • Mostly the work of a single principal developer
  • 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: MIT License: GPL-2.0
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked September 22, 2026

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