Xpdf
Xpdf is an open source PDF viewer and toolkit developed by Glyph & Cog, LLC. It is available for Linux, UNIX, and other platforms and is licensed under the GNU General Public License (GPL). The Xpdf suite of tools includes:
• pdftops – converts PDF to PostScript
• pdfinfo – prints information about a PDF file
• pdftotext – converts PDF to plain text
• pdffonts – lists the fonts used in a PDF file
• pdfimages – extracts images from a PDF file
• pdftoppm – converts PDF to PPM, PGM, or PBM format
• pdfseparate – extracts single pages from a PDF file
• pdfunite – combines multiple PDF files into a single PDF file
Xpdf is a powerful PDF viewer that is well-suited for use in both the desktop and server environments. It is fast, reliable, and supports a wide range of features.
Xpdf provides a secure and reliable way to view and manipulate PDF files.
Features:
• Support for PDF 1.7 (including transparency and layers)
• Support for 128-bit RC4 and 256-bit AES encryption
• Full-screen mode for presentations
• Zoom and rotate pages
• Searchable full-text indexing
• High-quality printing
• Display PDFs with the same look and feel as Adobe Acrobat
• Support for embedded fonts
• Integrated support for the Unicode character set
• Support for embedded JavaScript
• Supports a wide range of image formats
• Integrated support for CJK fonts
• Support for interactive form fields
• Integrated support for digital signatures
• Support for annotations and bookmarks
• Support for hyperlinks
• Integrated support for PDF/A
• Integrated support for PDF/X
• Support for multiple language versions
• Integrated support for Windows, Mac, and Linux
• Support for multiple page sizes and page orientation
• Support for external hyperlinks
• Integrated support for 3D objects
• Integrated support for embedded multimedia
• Support for attaching files to a PDF document
• Integrated support for digital rights management
• Integrated support for web-based PDF viewing
• Integrated support for interactive PDF forms
• Integrated support for OCR
• Integrated support for watermarking
• Integrated support for page numbering
• Integrated support for page numbering and Bates numbering
• Integrated support for text extraction and text search