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Software · PDF: read, create, edit

Scrolex

Scrolex is a PDF reader, available on Linux: themes and dark mode, full-text search.

  • Completely free
  • Linux
  • Open source

Overview

Scrolex is a PDF reader, available on Linux.

Features described in its Flathub listing and in its GitHub repository: themes and dark mode, full-text search.

File formats mentioned: PDF, EPUB, MOBI and CBZ.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Hue-preserving dark mode that stays enabled across sessions” — Flathub, 10 November 2026
  • “Full text search” — Flathub, 10 November 2026
  • “Scrolex - A Horizontally Scrolled Document Viewer.” — GitHub, 10 November 2026

At a glance

All of Scrolex is free: no feature is locked behind a paid plan, and its code is open.

Its licence (AGPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Scrolex puts pages side by side, so you scroll left and right through a document instead of up and down. On a wide screen this shows several pages at once without wasted space. It opens PDF, EPUB, MOBI, FictionBook, XPS and comic book (CBZ) files. Other features: Margin cropping, to fit more content on screen Hue-preserving dark mode that stays enabled across sessions Zoom with Ctrl+scroll or touchpad pinch gestures Full text search Table of contents to jump between sections One page per scroll wheel step, or keyboard navigation Sharp rendering on HiDPI displays Runs on both Wayland and X11

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from LicitPro automatic classification () —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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