PDF Password Protector
Add password protection and AES-256 encryption to PDF files. Set permissions for printing and copying — 100% in your browser.
- 100% free
- No sign-up
- No limits
- Instant results
What is PDF Password Protector?
PDF Password Protector is a free online tool that adds encryption and password protection to PDF documents.
Set a user password (required to open the file) and an optional owner password (to change permissions). Control whether viewers can print, copy text, edit, or fill forms. Uses AES-256 encryption — the same standard used by banks and governments. Everything runs in your browser — your PDF and passwords never leave your device.
How to use PDF Password Protector
- 1
Upload your PDF
Click the upload area or drag and drop a PDF file you want to protect.
- 2
Set passwords
Enter a user password (required to open) and optionally an owner password (to change permissions later).
- 3
Configure permissions
Choose what viewers can do: allow or block printing, copying text, editing, and form filling.
- 4
Protect
Click Protect PDF. The tool encrypts the file with AES-256 encryption in your browser.
- 5
Download
Download the password-protected PDF. Anyone who opens it will need the user password.
Everything this tool
does for you
- AES-256 encryption (military-grade)
- Separate user and owner passwords
- Control print permissions
- Control copy/edit permissions
- Password strength indicator
- Form filling permission control
- 100% client-side — passwords never transmitted
- No signup, no limits, completely free
Related free tools
Frequently asked questions
This tool fixed one thing.
Now fix the whole site.
Our scanner runs 240+ checks across 10 audit areas, ranks every issue by the score points it costs, and hands you the code to paste.
Run a free audit- AES-256 encryption
- User + owner password support
- Control print, copy, edit permissions
- Password strength indicator
- Files never leave your browser
- No signup or limits