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| File - Download PDF4QT v1.5.3.1 | ||||||||
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A plea... Deanna and I have been running this site since 2008 and lately we're seeing a big increase in users (and cost) but a decline in percentage of users who donate. Our ad-free and junkware-free download site only works if everyone chips in to offset the revenue that ads on other sites bring in. Please donate at the bottom of the page. Every little bit helps. Thank you so much. Sincerely, your Older Geeks: Randy and Deanna Always scroll to the bottom of the page for the main download link. We don't believe in fake/misleading download buttons and tricks. The link is always in the same place. PDF4QT v1.5.3.1 👉 Open-source PDF editor, viewer, and toolkit for Windows and Linux. PDF4QT is an open-source PDF editor powered by the Qt framework. It provides a robust C++ library, intuitive applications for viewing and editing PDF documents, and a command-line tool for script integration. The suite includes tools for advanced PDF viewing, lightweight document viewing, page organization, and PDF comparison, making it useful for both regular users and developers.  Features: Advanced PDF viewer with zoom, rotation, page layout modes, and navigation tools Full PDF editing capabilities including modifying document structure and content elements Annotation tools such as highlights, notes, shapes, and markup editing Interactive form filling and support for AcroForms Digital signature support including signing documents and validating signatures Encryption support with password protection and public key security Embedded file attachments handling within PDF documents Built-in text-to-speech engine for reading PDF content aloud Powerful search functionality including regular expression support PDF document comparison tool to detect differences between files Page management tools including merge, split, reorder, rotate, clone, and insert pages Document optimization features for reducing file size and improving performance Internal PDF object structure inspector for advanced users and developers Command-line interface for automation and batch processing tasks Static XFA form support (read-only for simple XFA documents) Multiple viewer applications included (advanced viewer and lightweight viewer modes) Cross-platform support built on the Qt framework Supported operating systems: Windows 10/11 Linux Supported languages: Czech, English, French, German, Korean, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish Changes: v1.5.3.1 01-22-26 Windows installer fix Issue #341: Embed AppImage update information Issue #339: (zh_TW) Traditional Chinese Translation File Issue #333: ijg-libjpeg obsoleted in vcpkg Issue #329: How to remove "External links" Issue #269: Nested Bookmarks loses children when moving. Issue #179: Signature: Adding .jpg or .png image crashes PDF4QT Issue #146: Incorrect fonts displayed on Linux Issue #144: Text notes - drag and drop annotations     This download is for the Windows MSI installer version (very bottom of page). All other download assets are below: Other Windows: PDF4QT-Windows-1.5.3.1.zip (portable) JakubMelka.PDF4QT_1.5.3.1.msix (MSIX installer) Linux: PDF4QT-1.5.3.1-x86_64.AppImage io.github.JakubMelka.Pdf4qt.flatpak PDF4QT-1.5.3.1-x86_64.AppImage.zsync Click here to visit the author's website. Continue below for the main download link. |
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| Downloads | Views | Developer | Last Update | Version | Size | Type | Rank | |
| 582 | 3,844 | Jakub Melka | Apr 22, 2026 - 12:37 | 1.5.3.1 | 28.16MB | MSI |  , out of 16 Votes. |
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| File Tags | ||||||||
| PDF4QT PDF editor PDF viewer open source PDF toolkit Windows Linux document editor document viewer command line PDF comparison PDF annotations | ||||||||
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