PDF Tool

Password Protect PDF

Add AES-256 password protection to PDF files. Set user and owner passwords, control permissions (print, copy, edit), and generate strong random passwords.

Drop your file here, or browse

PDF to password-protect

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How to Protect PDF

  1. Upload your PDF

    Drop your PDF file into the upload area.

  2. Set your password

    Enter a password (or generate a strong random one). Optionally set an owner password and restrict permissions.

  3. Download protected PDF

    Click "Protect & Download" — your PDF is now encrypted with AES-256.

Features

  • AES-256 encryption (PDF 2.0)
  • User and owner passwords
  • Permission controls (print, copy, edit, etc.)
  • Password strength meter
  • Random password generator
  • 100% client-side — password never transmitted

Frequently Asked Questions

What encryption standard is used?
AES-256 encryption per the PDF 2.0 specification — the strongest available PDF encryption standard.
What is the difference between user and owner passwords?
The user password is required to open the PDF. The owner password controls permissions (printing, copying, editing) — it can be set separately from the user password.
Can I restrict printing or copying?
Yes — use the permission checkboxes to control: Print, Copy Text, Edit Content, Fill Forms, Add Annotations, and Assemble Document.
Is the password stored anywhere?
No. Your password is used only in-browser to encrypt the PDF and is never transmitted or stored.