Password Protect PDF
Encrypt and password protect sensitive PDF documents with secure AES encryption and permission locks.
Select PDF to Encrypt & Protect
Set password encryption to restrict viewing, editing, and copying
About Password Protect PDF
Secure your confidential financial statements, legal briefs, and personal documents with standard PDF encryption. Set user passwords required for viewing as well as permission restrictions against printing and copying.
How to Use Password Protect PDF
Select and upload the PDF file you want to protect.
Enter a strong user password and confirm it.
Optionally restrict printing or copying permissions.
Click "Encrypt PDF" and download your secure password-protected file.
Supported Formats & Limits
- Supported Inputs: PDF
- Guest Maximum Size: 25 MB
- Logged-in Max Size: 100 MB
- System Compatibility: Windows, macOS, Linux, iOS & Android
Privacy & Security Guarantee
This tool processes your files entirely inside your web browser using client-side JavaScript, WebAssembly, and Canvas APIs. Your document is never uploaded to any external server, guaranteeing total confidentiality.
Frequently Asked Questions
Can NivoTools see or store my password?
No. Processing happens locally in your browser. Passwords are never sent to or stored on our servers.