PDF4QT

Spec sheet

Purpose

PDF4QT is an open-source PDF toolkit with desktop applications, command-line tools, and a C++/Qt PDF engine.Read 11 Oct 2026 · github.com

Product

PDF4QT is an open-source PDF toolkit with desktop applications, command-line tools, and a C++/Qt PDF engine.Read 11 Oct 2026 · github.com

Free plan

YesRead 20 Sep 2026 · github.com

License

The repository says PDF4QT is licensed under the MIT License.Read 11 Oct 2026 · github.com

Annotation tools

YesRead 20 Sep 2026 · github.com

Applications

The suite includes PDF viewing, document page manipulation, and document comparison applications.Read 11 Oct 2026 · github.com

Command-line use

PDF4QT includes a command-line tool, which the project describes as useful for script integration.Read 11 Oct 2026 · jakubmelka.github.io

Developer use

The project can be compiled on Windows and Linux and requires a compiler supporting C++20.Read 11 Oct 2026 · github.com

Document security

The project lists encryption and digital signature validation among its features.Read 11 Oct 2026 · github.com

Downloads

The project lists Windows installer and ZIP downloads, plus Linux AppImage and Flatpak packages.Read 11 Oct 2026 · jakubmelka.github.io

Form creation

NoRead 20 Sep 2026 · github.com

Linux downloads

The README lists Flatpak and AppImage packages for Linux, and says the historical .deb package was discontinued.Read 11 Oct 2026 · github.com

Maintainer

The README says the software is written and maintained by Jakub Melka.Read 11 Oct 2026 · github.com

OCR

OCR for scanned documents uses Tesseract and can add a searchable invisible text layer.Read 11 Oct 2026 · github.com

PDF applications

Its applications include a viewer, a document page organizer, and a tool for comparing two documents.Read 11 Oct 2026 · jakubmelka.github.io

PDF conversion

YesRead 20 Sep 2026 · github.com

PDF editing

Listed features include annotations, form filling, redaction, document signing, and managing file attachments.Read 11 Oct 2026 · jakubmelka.github.io

PDF features

Listed capabilities include encryption, signature validation, annotations, form filling, document editing, compression, and digital signing.Read 11 Oct 2026 · github.com

PDF standard

The project says its PDF functionality is based on PDF Reference 2.0.Read 11 Oct 2026 · github.com

Rendering

The project lists multithreading and hardware-accelerated rendering among its features.Read 11 Oct 2026 · jakubmelka.github.io

Security policy

GitHub reports that the project has no SECURITY.md policy and no published security advisories.Read 11 Oct 2026 · github.com

Supported platforms

Windows,LinuxRead 20 Sep 2026 · github.com

Text editing

YesRead 20 Sep 2026 · github.com

Warranty

The software is provided without any warranty.Read 11 Oct 2026 · github.com

Windows downloads

The README says the release page lists Windows binaries with and without an installer.Read 11 Oct 2026 · github.com

XFA limit

Its static XFA support is read-only and limited to simple XFA.Read 11 Oct 2026 · github.com

XFA limitation

Static XFA support is read-only and limited to simple XFA.Read 11 Oct 2026 · github.com

Plans and prices

Every PDF4QT plan and price →

Where Specifiction places it

• PDF editors#44 of 1028.1