Protect PDF with Password Online

Add or remove PDF password protection online free for secure file sharing and document control.

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Drop a PDF file here or click to browse
Select a PDF to protect or unlock

What This Tool Does

Add password protection to PDF files for secure sharing.

This PDF protection tool adds password security to your PDF files. Control who can open, print, copy, or modify your documents for secure sharing.

When to Use This Tool

  • Protect confidential documents
  • Secure contracts and agreements
  • Control document access
  • Prevent unauthorized editing

How to Use

  • Upload your PDF file
  • Set a password
  • Download protected PDF

Frequently Asked Questions

What's the difference between open password and permissions?
An open password is required to view the PDF. Permissions control what users can do after opening (print, copy, modify). You can set both or just one.
Can I remove protection later?
Yes, use our PDF Unlock tool to remove password protection. You'll need the password to remove it. Keep your passwords safe!
Is the protection secure?
PDF password protection uses 128-bit encryption. While secure for most purposes, determined attackers with specialized tools may be able to crack simple passwords. Use strong, unique passwords for sensitive documents.