Professional-grade password protection with granular permissions and AES encryption
Select a PDF file to protect with advanced security
Support for PDFs • Max 50MB • Privacy protected
Configure comprehensive password protection and security options
Owner password allows changing permissions and removing protection
Control what users can do with the protected PDF (requires owner password)
Professional-grade security toolkit with comprehensive protection options
Separate owner password for advanced permission controls and security management.
Control printing, copying, modifying, annotating, forms, and accessibility features individually.
Choose between AES 128-bit and AES 256-bit encryption for maximum security.
Set expiration dates and times for temporary document access.
Strip sensitive metadata including author, creation date, and document properties.
Add invisible security markers to track document authenticity.
All encryption happens locally in your browser - complete privacy protection.
Works with all modern PDF readers and maintains compatibility across devices.
Answers to common questions about advanced PDF password protection
The user password is required to open and view the PDF. The owner password allows changing security settings and permissions. If only a user password is set, anyone with the password has full access. With an owner password, you can restrict specific actions while still allowing the document to be opened.
You can control: printing (high or low resolution), copying text/images, document modification, annotations and comments, form filling, accessibility features, and document assembly. These permissions only work when an owner password is set.
AES 256-bit provides maximum security and is recommended for highly sensitive documents, legal agreements, financial data, or any content requiring the highest level of protection. AES 128-bit offers excellent security for most everyday documents while maintaining better compatibility.
Password expiration allows you to set a specific date and time when the password will no longer work. This is useful for temporary document access, time-limited contracts, or documents that should only be accessible for a specific period. Note that this feature depends on PDF reader support.
The tool can remove common metadata including: document author, creation date, modification date, software used to create the document, and other properties that might contain sensitive information. This helps protect document privacy and prevents tracking.
The security watermarks are designed to be invisible to normal viewing but can be detected by specialized tools. They help verify document authenticity and can deter unauthorized copying or modification.
Yes! All PDF processing, encryption, and security operations happen locally in your web browser. Your files never leave your device or get uploaded to any server. This ensures complete privacy and security of your documents.
You can only unlock PDFs for which you know the password. This tool cannot crack or bypass unknown passwords - it only removes protection when you provide the correct user or owner password. Always ensure you have permission to unlock documents.