Top QPDF Alternatives for PDF Manipulation
QPDF is a powerful command-line tool known for its ability to manipulate PDF files, offering features like merging, splitting, linearizing, encrypting, and even enabling text-editor based content editing. While incredibly versatile for developers and those wanting to dive deep into PDF structure, QPDF isn't a PDF content creation library, a viewer, or a converter to other formats. If you're looking for a user-friendly interface, broader functionalities, or specific features beyond QPDF's core offerings, exploring a QPDF alternative might be exactly what you need.
Best QPDF Alternatives
Whether you're a casual user needing to quickly merge documents or a professional looking for advanced security features, there's a QPDF alternative out there for you. Let's explore some of the top contenders that offer robust PDF manipulation capabilities.

PDFsam
PDFsam is a popular free and open-source desktop application available for Mac, Windows, and Linux. It stands out as a strong QPDF alternative for its user-friendly graphical interface, allowing users to easily split, merge, extract pages, rotate, and mix PDF files. Its features include comprehensive PDF editing, combining, splitting, and document merging, making it a versatile tool for everyday PDF tasks.

PDFtk
PDFtk, available in Free, Pro, and a command-line Server version for Mac, Windows, Linux, and self-hosted environments, offers a simple yet powerful approach to PDF manipulation. Similar to QPDF, PDFtk excels at fundamental operations like document merging and splitting PDF files, making it a solid QPDF alternative for those who appreciate command-line utility or need basic PDF transformations.

LockPDF
LockPDF is a free, web-based online tool specifically designed for encrypting and locking PDF files. If your primary need is to password-protect PDFs with strong encryption quickly and easily, LockPDF serves as an excellent QPDF alternative focusing on security features without the need for software installation.

iSafePDF
iSafePDF is a free, open-source Windows application that provides robust PDF protection. It allows users to encrypt PDF documents, sign them with certificates, and timestamp signatures. For those seeking a QPDF alternative that offers comprehensive PDF security and protection features, iSafePDF is a strong contender.

Stellar Repair for PDF
Stellar Repair for PDF is a commercial Windows and Mac-based software focused on repairing damaged PDF files. While QPDF handles structural transformations, Stellar Repair for PDF specializes in restoring corrupted documents, including forms, headers, footers, and various media, making it a crucial QPDF alternative for data recovery scenarios.

Birdie PDF Security Remover
Birdie PDF Security Remover is a commercial Windows application designed to remove restrictions from PDF files, offering a bulk mode facility. For users who frequently encounter secured PDFs and need to remove printing, copying, or editing restrictions, this tool serves as a direct QPDF alternative for security removal.

PDF Password Remover Tool
The PDF Password Remover Tool is a free Windows utility that decrypts password-protected PDF files, specifically those with an 'owner' password set. If your main concern is accessing restricted PDF content, this simple tool offers a direct and efficient QPDF alternative for password removal.

PDFEncrypt
PDFEncrypt is a free, open-source Windows application dedicated to encrypting any PDF file using industry-standard algorithms like AES encryption. As a QPDF alternative, PDFEncrypt provides a straightforward solution for users who primarily need to secure their PDF documents with strong encryption.

A-PDF Restrictions Remover
A-PDF Restrictions Remover is a commercial Windows application designed to easily remove restrictions from PDF files. For a modest price, users can simply right-click a PDF in Windows Explorer to remove protections, making it a convenient QPDF alternative for bypassing common PDF restrictions.

Freeware PDF Unlocker
Freeware PDF Unlocker is a simple and useful free Windows application that removes passwords and restrictions from any readable PDF file. Its drag-and-drop functionality makes it an incredibly user-friendly QPDF alternative for quickly unlocking secured PDFs.
Each of these QPDF alternatives offers unique strengths, from comprehensive editing suites to specialized security tools. Consider your specific needs regarding platform compatibility, open-source preference, and desired features to determine the best fit for your PDF manipulation tasks.