Add password protection and AES-256 encryption to PDF files. Set permissions for printing and copying — 100% in your browser.
PDF Password Protector is a free online tool that adds encryption and password protection to PDF documents. Set a user password (required to open the file) and an optional owner password (to change permissions). Control whether viewers can print, copy text, edit, or fill forms. Uses AES-256 encryption — the same standard used by banks and governments. Everything runs in your browser — your PDF and passwords never leave your device.
Click the upload area or drag and drop a PDF file you want to protect.
Enter a user password (required to open) and optionally an owner password (to change permissions later).
Choose what viewers can do: allow or block printing, copying text, editing, and form filling.
Click Protect PDF. The tool encrypts the file with AES-256 encryption in your browser.
Download the password-protected PDF. Anyone who opens it will need the user password.
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