PDF4QT 1.6.0.0 by Razvan Serea
PDF4QT is a free and open-source application created to provide a complete solution for working with PDF documents in a simple, flexible, and effective way. It offers all the essential tools you need to handle your files: you can view PDFs with smooth navigation, edit content, annotate pages, and highlight key sections for better collaboration. It also allows you to compare two versions of a document, making it easy to spot changes. Built-in security features give you control over protecting sensitive information and managing access.
Applications
PDF4QT Viewer Profi: Advanced PDF browsing with encryption, digital signature verification, annotation editing, regex text search, page-to-image conversion, and plugin support.
PDF4QT Viewer Lite: Lightweight viewer with essential, user-friendly PDF viewing functions.
PDF4QT DocPage Organizer: Merge, split, move, clone, or add pages easily with an intuitive interface.
PDF4QT DocDiff: Compare two PDFs, highlight differences page-to-page, and export results to XML.
Key Features
Multithreading Support for faster PDF processing
Hardware Accelerated Rendering for smooth, high-quality display
Encryption to secure documents
Color Management to preserve accurate color profiles
Optional Content Handling to control visibility of content
Text Layout Analysis for better text extraction and editing
Signature Validation for verifying digital signatures
Annotations and Form Filling for interactivity
Text-to-Speech Conversion to listen to PDFs
Advanced Annotation Tools (images, text, etc.)
File Attachments Management to view and save attachments
Optimization to reduce file size without losing quality
Command Line Tool for automation
Audio Book Conversion from PDFs
Internal Structure Inspector to explore PDF structure
Compare Documents to detect differences
Redaction to remove sensitive information
Document Signing for digital authentication
PDF4QT 1.6.0.0 release notes:
PDF4QT 1.6.0.0 brings a major image compression and optimization update, especially for PageMaster and assembled output documents. Image compression is now integrated into the assembly/export workflow, backed by new optimizer infrastructure, UI controls, feedback fixes, and tests. This should make PageMaster much more useful for producing smaller output PDFs directly from assembled or reorganized documents.
The release also contains a large PageMaster refresh with improved drag and drop, recent files, crop pages, save/restore functionality, rotation and size indicators, a reworked icon set, and faster output preview rendering. Viewer and Editor workflows were improved with wildcard Advanced Find, Enter-to-search behavior, better outline keyboard selection, startup settings, fullscreen support, side-to-side scrolling, smoother scrolling, text selection, snapping, and expanded annotation controls.
Compatibility and platform behavior were improved as well, including fixes for embedded files, fonts, checkboxes, invisible text, menu colors, highlights, XMP metadata, Windows color management, AppImage packaging, MSIX generation, installer behavior, translations, and newer compiler/Qt warnings. The commit history also includes a new scan-and-edit plugin foundation and color management performance work.
Changelog:
Highlights
Image compression for PageMaster / DocPage Organizer and assembled output documents (#92)
Major PageMaster UX refresh, including drag and drop, recent files, crop pages, save/restore, icons, and output preview performance (#383, #18)
Improved image optimization feedback, including final resolution and DPI updates (#384)
Better Viewer and Editor navigation: fullscreen, side-to-side scrolling, smoother scrolling, text selection, snapping, and outline keyboard selection (#242, #368, #136, #321, #250, #373)
Advanced Find wildcard mode and Enter-to-search behavior (#379, #378)
PDF compatibility fixes for embedded files, fonts, checkboxes, invisible text, form content suppression, and Windows color management (#225, #356, #256, #230, #326, #224, #385, #388)
Startup settings, custom settings directory support, Linux double-click viewer separation, and packaging/build fixes (#382, #380, #381)
Scan-and-edit plugin foundation and broader translation updates from the 1.6.0.0 development cycle
Resolved Issues
Issue #389: Adding hyperlink to internal object in PDF
Issue #388: Update Windows color management system
Issue #385: PDFTextLayoutGenerator::isContentKindSuppressed(ContentKind kind) is missing ContentKind::Form
Issue #384: In the "Optimize Images" dialog, the info on the final image resolution and final DPI does not update
Issue #383: UX improvements for PDF4QT PageMaster tool (v1.5.3.1) (ex. DocPage Organizer)
Issue #382: Startup Settings
Issue #381: Separated apps for double-click viewer in Linux
Issue #380: Ability to run app with custom settings directory - executable parameter with path
Issue #379: Advanced Find - Wildcard Mode
Issue #378: Advanced Find - Should start searching if Enter key is pressed
Issue #376: Deleting a note jumps to Outline
Issue #375: Not enough maximum compiled page cache
Issue #373: Ctrl/Shift keyboard selection for Outline
Issue #372: Option to not color images
Issue #370: Extracting pages within a range
Issue #369: Keeping redact box on
Issue #368: Side-to-side scrolling
Issue #357: Bulk delete/add/edit of page labels
Issue #356: Compatibility issues - font problems
Issue #354: Color blend mode for highlights
Issue #352: Icon size of the sidebar
Issue #349: Add inherit zoom to bookmark zoom options
Issue #338: Editor toolbox higher than editor window
Issue #334: Impossible to set French language
Issue #326: Checkboxes don't render in PDF4QT
Issue #324: Menu text not rendered with correct color
Issue #321: Select text in Viewer
Issue #291: Support for editing XMP metadata or exporting to PDF/UA format
Issue #282: Editor outline view: always zooms to around 50%
Issue #256: PDF4QT cannot show some specific fonts correctly
Issue #253: Undo/redo doesn't work in "edit page content" mode
Issue #250: Snapping
Issue #242: Full screen
Issue #234: Setting font, font size and area of text annotations
Issue #230: Garbled characters when opening PDF files with PDF4QT
Issue #225: PDF4QT cannot open PDF files with embedded files
Issue #224: Option to remove invisible text
Issue #194: Change page size
Issue #160: Color | Custom (green/black) does not work
Issue #136: Smooth scrolling of document with mouse middle wheel - flywheel
Issue #92: Add image compression to PDF DocPage Organizer
Issue #18: Performance optimization - OutputPreview Renderer
Download: PDF4QT 1.6.0.0 | Portable | ~30.0 MB (Open Source)
Download: PDF4QT MSIX | 29.4 MB
Links: PDF4QT Home Page | PDF4QT @GitHub | Screenshot
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