Upload PDF
Drag & Drop PDF File
or click to browse (Max: 50MB)
Secure your sensitive PDF documents with military-grade encryption and password protection
or click to browse (Max: 50MB)
Integrate PDF encryption directly into your applications with our REST API.
Endpoint: POST /api/v1/encrypt-pdf
Headers: Content-Type: multipart/form-data
Parameters:
file: [PDF file] password: [encryption password] encryptionLevel: "128" or "256" (default: "256")
Response:
{
"success": true,
"encryptedFile": "base64_encoded_pdf",
"fileName": "protected_document.pdf",
"encryptionLevel": "256-bit AES",
"fileSize": "2.5 MB"
}
Our PDF Lock Tool provides enterprise-level security for your confidential documents. Protect sensitive information, financial records, legal documents, and personal files with state-of-the-art 256-bit AES encryption technology. This advanced tool ensures your PDF files remain secure from unauthorized access while maintaining complete privacy as all processing happens locally in your browser.
Key Security Features:
256-bit AES encryption for maximum security protection
Set strong passwords with real-time strength analysis
Encrypt large PDF files in seconds with progress tracking
All processing happens locally - no files uploaded to servers
Perfect for: Businesses protecting confidential data, lawyers securing legal documents, individuals safeguarding personal records, healthcare professionals protecting patient information, financial institutions securing financial documents, and organizations complying with data protection regulations like GDPR, HIPAA, and CCPA.
How it works: Simply upload your PDF, set a strong password, choose your encryption level, and download your protected file. Our tool uses advanced Web Cryptography API to ensure your documents remain secure throughout the entire process. No registration required - completely free and unlimited usage.