Lock PDF Document
Encrypt and lock your PDF document offline. Set user passwords for opening, restrict user permissions, and ensure standard 128-bit security.
Drag & Drop your PDF file here
Choose a local document to secure. Your files never leave your device.
100% Secure Client RAM Enginedocument.pdf
Document Cover Preview
Note: The Owner Password restricts modifying or copying permissions. It must be different from the User Password.
Permissions enforce restrictions when opened in standard readers. Only active if an Owner Password is configured.
PDF Sealed Successfully!
Your document has been locked and encrypted with offline security hashes. Ready to download securely.
Zero-Server Leakage
Calculated inside WebAssembly and secure local RAM spaces. No logs, metadata, or documents touch servers.
Standard RC4/AES
Uses standard encryption formats to guarantee that locked PDFs request credentials in all modern readers.
Granular Restrictions
Allows restricting commenting, editing, copying, and printing to protect document authorship.