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PapersSioyek
Free

Free GNOME app, supported by donations to the GNOME Foundation.

 Free

Free and open source under the GPL. The developer accepts optional donations.

Linux Windows, macOS, Linux
  • Annotation and highlighting of PDFs
  • Opens DjVu, TIFF and comic book archives
  • Opens a referenced figure, table or citation in an overlay without losing your place
  • Searchable highlights, bookmarks and marks across your whole library
  • Linux only
  • No full PDF text editing
  • The last tagged release is from December 2022
  • macOS shows a quarantine warning that needs working around on first launch
Downloadable app Downloadable app
Open source Open source
License not stated License: GPL-3.0
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 21, 2026

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