Protect PDF: Password Lock

Protect PDF: Password Lock helps you protect PDF files with a password, unlock PDF documents when you know the current password and change PDF passwords in a focused offline workflow. Use it when you need a simple PDF password tool for private documents, invoices, contracts, forms, study notes or files you want to share more safely. Import a PDF, choose Protect, Unlock or Change Password, then save or share the processed file. Key features: • Protect PDF files with an opening password • Unlock PDF files when you have the correct password • Change PDF passwords without starting from scratch • Generate strong passwords and copy them to the clipboard • Allow or block printing when creating a protected PDF • Allow or block text copying when protecting a file • Save, share and export protected or unlocked PDFs • Local history for recently processed documents • Clean interface with light and dark mode Private by design: Your PDF files are processed on your device. There is no account flow and no need to upload your documents to a server to protect, unlock or change a PDF password. Protect PDF is built for users who want a fast PDF lock app, a PDF unlock tool and a PDF password changer in one place. The app focuses on security tasks instead of adding a heavy all-in-one editor. All PDF features are available in the app. An optional one-time purchase removes ads. Important: You must know the current password to unlock a strongly protected PDF or change its password. Keep your new password somewhere safe.