Secure Your PDFs with PDF Lock
PDF Lock secures your PDFs with strong password encryption, restricting access to authorized users. Prevent unauthorized editing and sharing while preserving content integrity. Enjoy hassle-free PDF security without downloads or installations.
Password Protect Your PDF
Key Features
256-bit AES encryption for maximum security
Password protection to prevent unauthorized access
Customizable document permissions (print, copy, edit)
Supports large PDF files up to 50MB
No file storage - processed and deleted immediately
Compatible with all PDF readers and devices
Common Use Cases
- Protect confidential business documents and contracts
- Secure financial reports and tax documents
- Encrypt legal documents and NDAs
- Protect intellectual property and copyrighted materials
- Secure medical records and patient information
- Lock academic papers and research documents
- Encrypt employee handbooks and HR documents
- Protect client proposals and presentations
How to Use PDF Lock
- Click "Select PDF File" and choose the PDF you want to protect
- Enter a strong password (minimum 4 characters, recommended 8+)
- Select document permissions (all, print only, or read only)
- Click "Lock PDF" to encrypt your document with 256-bit AES
- Download your password-protected PDF file
- Remember your password - store it in a safe place
