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 1.5.3.1 changelog:
- 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
Download: PDF4QT 1.5.3.1 | Portable | ~28.0 MB (Open Source)
Download: PDF4QT MSIX | 28.4 MB
Links: PDF4QT Home Page | PDF4QT @GitHub | Screenshot
