🔒 PDF Protect

Add password protection and encrypt your PDF document securely in your browser.

Select PDF File

Set User Password (Required to open file)

Set Owner Password (Optional for permissions)

What is PDF Protection?

PDF protection encrypts your document with password protection so that unauthorized users cannot open, view, or modify the content of your PDF file.

Frequently Asked Questions

1. Is it safe to protect my sensitive PDF files here?

For supported files, the encryption process runs in your browser. The PDF file is not uploaded by the tool itself.

2. What encryption strength is applied to the PDF?

The tool uses the PDFSmaller browser encryption library with AES-256 by default on HTTPS, with permission controls. If AES-256 is unavailable in an older/non-secure context, the tool will stop rather than silently downgrade.

3. What is the difference between User and Owner passwords?

The User password is required to open and read the file, whereas the Owner password controls permissions like printing, editing, and copying text.