Protect PDF with Password
Add a password to your PDF file to protect its content from unauthorized viewers
⚠️ Security Note
This tool adds a basic protection layer to PDFs. Files are encrypted client-side and can only be opened using VnnTools Unlock PDF. For enterprise-grade security, use Adobe Acrobat.
Upload PDF File
Drag & drop a PDF file here or click to browse
Supports PDF files
Result
No result yet. Upload a PDF, enter a password, and click Protect PDF.
Key Features
- Add password protection to PDF files
- Strong AES-256 bit encryption
- 100% browser-based processing - completely secure
- No registration required, completely free
How to Use
- Upload the PDF file you want to protect
- Enter your password and confirm it
- Click 'Protect PDF'
- Download the encrypted PDF file
Frequently Asked Questions
Is the encryption secure?
Yes, we use AES-256 bit encryption - the same bank-level security standard. If you forget the password, there is no way to recover the content.
Our PDF protector makes it easy to encrypt PDF files with a strong password, quickly and securely.