Updated Jun 11, 2026 · v1.0.0
Protect PDF files with password lock and save as a new secure PDF
PDF Password Lock is a simple and secure PDF protection app that lets you apply a password to PDF files and save them as new locked PDF documents. The original PDF file is not modified. A new password-protected PDF copy is created instead. Main features • Add password protection to PDF files • Keep the original file unchanged • Save new locked PDF copies • View saved history • Share protected PDF files • Fast and simple PDF security process • Local device storage support • Multi-language support How to use 1. Select a PDF file 2. Enter a password 3. Apply password protection 4. Save a new locked PDF file The app processes files locally on your device and only handles files selected by the user. Important • If you forget the password, you may not be able to open the protected PDF file. • PDF encryption compatibility may vary depending on the PDF viewer. • Some special PDF files may have limited support. This app is not affiliated with Adobe and is not an official Adobe product.
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