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Software · PDF: read, create, edit

PDF4QT

PDF4QT is a PDF editor, available on Windows and Linux: command-line use.

  • Completely free
  • Windows and Linux
  • Open source

Overview

PDF4QT is a PDF editor, available on Windows and Linux.

Features described in its Flathub listing and on its official website: command-line use.

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
  • “PDF4QT is an open source PDF editor for Windows/Linux.” — official website, 10 November 2026
  • “With intuitive PDF viewing/editing applications and a handy command-line tool, PDF4QT streamlines your PDF interactions.” — Flathub, 10 November 2026

At a glance

PDF4QT is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (MIT) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

  • Annotate and highlight (capability established by the official page)
  • Merge and rearrange pages (capability established by the official page)
  • Open source code
  • Commercial use allowed

About

Unleash the power of PDF4QT: Your go-to open source PDF editor. Beyond its capabilities in encryption, optimization, advanced annotations, editing, and signing, PDF4QT offers an extensive range of features to enhance your PDF experience. With intuitive PDF viewing/editing applications and a handy command-line tool, PDF4QT streamlines your PDF interactions. Discover its vast potential today.

Description from Flathub — AppStream (Flathub)

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