CK PDF Unlocker

CK PDF Unlocker is a desktop utility for removing passwords and printing, copying, or editing restrictions from PDF documents users are authorized to access. It processes individual files or large batches while preserving the original documents. A password vault remembers previously entered credentials for future use. Smart autofill identifies document owners and senders from filenames to select matching passwords. Users can maintain personal and shared encrypted vaults with automatic backups and conflict handling. The application uses pikepdf as its primary processing engine and qpdf as a fallback. A command-line interface supports scripted processing with the same vault functionality. Additional controls include custom output folders, automatic updates, and configurable themes. Files are processed locally without requiring an account.