Protect PDF
Add password protection and set permissions for your PDF files. Control who can open, print, copy, or modify your documents. Perfect for securing sensitive information.
or Drag & drop files here
Supported formats: .pdf, application/pdf
Professional PDF Protection Tool
Secure your PDF documents with password protection and granular permission controls. Our browser-based tool uses 256-bit AES encryption processed entirely on your device, allowing you to restrict printing, copying, editing, and other actions while ensuring your passwords and documents remain completely private.
Key Features:
- 256-bit AES encryption for maximum security
- Set user password (open) and owner password (permissions)
- Control printing, copying, editing, and form filling permissions
- Batch protect multiple PDF files simultaneously
- 100% client-side processing for complete privacy
- No password storage or transmission to servers
How to protect PDF files:
- 1
Click "Select PDF Files" or drag and drop your PDFs
- 2
Set a user password (required to open) and optionally an owner password
- 3
Choose what actions are allowed (printing, copying, modifying, etc.)
- 4
Click "Protect PDF" to apply encryption and restrictions
- 5
Download your password-protected PDF file
Your Privacy is Protected
All conversions happen locally in your browser. Your files never leave your device and are automatically deleted when you close this page.
Frequently Asked Questions
PDF encryption protects your documents by encoding the content with a password. Only users with the correct password can open or access the file, ensuring your sensitive information stays private.
The user password is required to open the PDF. The owner password allows changing permissions and security settings. You can set one or both passwords for different levels of protection.
We offer 40-bit (basic), 128-bit (standard), and 256-bit AES (maximum security). We recommend 256-bit AES encryption for best protection - it's the strongest PDF encryption standard available.
Yes, upload up to 20 PDFs and apply the same password and permissions to all files in one batch operation. This saves time when securing multiple documents.
Absolutely! All encryption happens directly in your browser using WebAssembly. Your files never leave your device, and we never see your passwords or documents. It's completely private and secure.
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Your Privacy is Our Priority
Unlike other PDF tools, we process your files directly in your browser using WebAssembly technology. This means your sensitive documents never leave your device.
Browser Processing
Processing happens in your browser
No File Uploads
No files uploaded to our servers
No Storage
We don't permanently store your files
Complete Privacy
Your files never leave your device during processing
100% Privacy Guarantee
We use cutting-edge WebAssembly technology to process your PDFs entirely within your browser. No uploads to our servers, no data collection, no privacy concerns. Just pure, local processing power.
How Our Privacy-First Technology Works
WebAssembly Processing
We use WebAssembly (WASM) to run PDF processing libraries directly in your browser, eliminating the need to upload files to external servers.
Local Storage Only
Files are temporarily stored in your browser's memory during processing and automatically cleared when you close the tab or complete the task.
No Data Collection
We don't track, store, or analyze your file contents. Our analytics only measure tool usage patterns, not personal data.
GDPR Compliant
Our privacy-first approach means we're automatically compliant with GDPR, CCPA, and other privacy regulations worldwide.