QPDF

Turning complex PDF tasks into everyday simplicity.

Transforming everyday chores into an effortless affair.

Secure your PDF files with a password, lock and unlock them, and protect against unauthorized access, copying, printing, and editing across Windows 8/10/XP with individual and commercial licenses.

Protect your PDF files with ease. Encrypt them using our industry-standard encryption algorithms. It's free and open-source for Windows.

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Effortlessly transform and manipulate PDF files with ease.

Instantly open and view corrupted PDF files on Windows with our free small utility.

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Secure and manage your valuable digital content with ease, providing file-level encryption, access controls, and advanced analytics for insightful decision-making.