PDF4QT

12 likes

Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.

Cost / License

Free
Open Source (MIT)

Application typeApplication types

Origin

Czechia
EU

Platforms

Windows
Linux
Flathub

PDF4QT alternatives

12likes

122alternatives

0articles

Features

Properties

Lightweight
Privacy focused

Features

Dark Mode
Ad-free
Hardware Accelerated
Sign PDF files
PDF annotation
PDF compression
Text to Speech
Portable
Rearrange PDF
QT Based
Support for Multiple threads

PDF4QT News & Activities

Highlights All activities

Recent activities

GetPdf added PDF4QT as alternative to PDF Guard
21 days ago
OrdinaryPerson added PDF4QT as alternative to PDFx (by AlexandrosGounis)
23 days ago
pdfops liked PDF4QT
about 1 month ago
Robin_P liked PDF4QT
about 1 month ago
TheEmperorArt added PDF4QT as alternative to Perfect PDF Reader
about 1 month ago
bgalvan added PDF4QT as alternative to No Bloat PDF
about 2 months ago
sanusihassan added PDF4QT as alternative to PDFSimplified
about 2 months ago
POX added PDF4QT as alternative to JOPDF
about 2 months ago
cat_tax liked PDF4QT
about 2 months ago
gotoarchi added PDF4QT as alternative to Archi Graphic Studio
3 months ago

Adobe Acrobat DC

Create and edit PDFs. Collaborate with ease. E-sign documents and collect signatures. Get everything done in one app, wherever you work. Acrobat’s got it. Stay on top of your documents with powerful features for desktop, mobile, ...

Learn More

Comments and Reviews

Top Negative Comment

★★★★★

Feb 20, 2024

Perhaps it has some value; however, when I used the app to re-arrange a PDF's pages, there was no obvious way to actually save what I had done. I searched through all the menus but...no luck. Maybe a decent help file or documentation would change my mind.

Jason Brown

CommentJul 25, 2024

Agree with "perhaps." Search function is not full text, limited to overview only, rendering it nearly useless for finding anything quickly. Loaded a 922 page PDF admirably quickly, so if the search function is improved, might be worth looking at again. One star for the app, one star for potential.

agreen03

★★★★★

Mar 16, 2026

While not a perfect replacement for Acrobat Pro, it does allow you to do basic pdf editing which is more than a lot of Open Source pdf tools out there.

Review from a new or low-activity account — shown here, but not counted in the app rating.

KimiBCN

★★★★★

Oct 16, 2025

It lacks many options and is not an alternative to Acrobat Pro. You can't OCR images, nor can you generate documents from a scanner.

RemovedUser

★★★★★

Jan 29, 2025

I wouldn't call it a "PDF Editor". It has very limited capabilities to actually edit the contents of the PDF files.

Review from a new or low-activity account — shown here, but not counted in the app rating.

Guest

CommentApr 7, 2024

useless, overloaded, fake, all smoke and no roast!

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Official Links

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What is PDF4QT?

PDF4QT is an open-source PDF viewer and editor based on the Qt framework. It includes a C++ library, PDF viewing and editing applications, and a command-line tool. It is compatible with Windows and Linux platforms. The software aims to provide a robust, open-source alternative to commercial PDF editors, with flexible licensing for both open-source enthusiasts and commercial users. It utilizes modern C++ features and multicore CPUs for efficient PDF editing and supports applications on Windows and Linux platforms. It also integrates the standard PDF 2.0 and supports high-resolution monitors.

PDF4QT offers features such as multithreading support, hardware-accelerated rendering, encryption, color management, optional content handling, and text layout analysis. It also includes signature validation, annotations and form filling, text to speech, advanced annotation tools, file attachments management, document compression, command-line tool, audio book conversion, internal structure inspector, document comparison, redaction, and document signing.