PDF Protect

Add password protection and permission restrictions to PDF files. Choose AES-256 encryption and download — entirely in your browser.

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About PDF Protect

Upload a PDF and add password protection with AES-256 or RC4 encryption. Set open and owner passwords, control printing, copying, and editing permissions — all processing happens locally in your browser.

Features

  • AES-256 and RC4 encryption options
  • Separate open and owner passwords
  • Control printing, copying, editing, and annotations
  • Re-protect already encrypted PDFs with the current password
  • 100% client-side — no uploads to a server

How to use

  1. 1Upload a PDF by dragging it in or clicking to browse.
  2. 2Set passwords, encryption, and permission options.
  3. 3Click Protect & Download to save the secured PDF.

Frequently Asked Questions

Are my PDFs or passwords uploaded to a server?
No. Encryption runs entirely in your browser. Your files and passwords never leave your device.
What is the difference between open and owner passwords?
The open password is required to view the PDF. The owner password controls permission settings and can differ from the open password.
Can I protect an already encrypted PDF?
Yes. Enter the current password so the tool can decrypt it, then apply your new protection settings.

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