Military-Grade PDF Protection
Secure your PDFs with AES-256 encryption, password protection, watermarks, and permission controls. 100% secure client-side processing.
Drag & Drop Your PDF File
or click to browse files. Maximum file size: 100MB
All processing happens locally in your browser
Encryption Settings
Basic Protection
Bank-Level Security
Maximum Security
Permission Controls
Watermark Settings
Metadata Protection
Protection Progress
Advanced PDF Protection Features
Military-Grade Encryption
AES-256 encryption ensures your PDFs are protected with bank-level security standards.
Granular Permissions
Control exactly what users can do - print, copy, edit, fill forms, and more.
Custom Watermarks
Add text watermarks to identify documents as confidential, draft, or for specific recipients.
Digital Signatures
Add digital signatures to verify document authenticity and integrity.
Password Expiry
Set passwords to expire after specific periods for enhanced security management.
Metadata Protection
Clean or customize PDF metadata to protect sensitive information.
How to Protect Your PDF
Upload Your PDF
Drag and drop your PDF file or click to browse. We support files up to 100MB.
Configure Security Settings
Set passwords, choose encryption level, adjust permissions, add watermarks, and customize metadata.
Apply Protection
Click "Protect PDF" to encrypt and secure your document. All processing happens locally.
Download Secure PDF
Download your protected PDF file with all security features applied.
Frequently Asked Questions
Is my PDF secure during processing?
Absolutely! All processing happens locally in your browser. Your PDF never leaves your computer.
What encryption levels are available?
We offer three levels: Standard (128-bit AES), Advanced (256-bit AES), and Military (256-bit AES with extra security layers).
Can I remove PDF protection?
This tool only adds protection. To remove protection, you need the owner password and should use a PDF editor with permission.
What happens if I forget the password?
We cannot recover lost passwords. Always store passwords securely. Consider using a password manager.
Are watermarks visible when printed?
Yes, watermarks are embedded in the PDF and will appear both on screen and when printed.
Can I protect multiple PDFs at once?
Currently, you can protect one PDF at a time. For batch processing, process each file separately.
What file size limits apply?
We support PDFs up to 100MB. For larger files, compress them first or split into smaller parts.
Is there any cost for using this tool?
No, Protect PDF Pro is completely free with no hidden charges or subscriptions.