PDF
Password
Protector

Add password protection to PDF files with customizable permissions for printing, copying, and editing.

Upload PDF

Select a PDF file to protect.

Protection Settings

Permissions

Output

No Output

Upload a PDF and set a password to protect it.

Learn more

What's the difference between user and owner passwords in a PDF?

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Frequently Asked Questions

PDF password protection encrypts the file using AES or RC4 encryption and requires the correct password to open or edit the document. The encryption key is derived from the password and stored within the PDF header.

A user password restricts who can open the document, while an owner password controls permissions such as printing, copying, and editing. Either or both can be set independently on the same PDF.

Weak or short passwords can be broken by dictionary attacks or brute force. PDFs encrypted with AES-256 and long random passwords are computationally impractical to crack with current hardware.

PDF Password Protector - Protect PDF Files | ToolsCanvas