Protect PDF, instantly.
Add password protection to your PDF. Browser-based, no upload.
Drop your PDF here
or browse files · max 25 MB
Understanding PDF password types
User Password (Open Password)
Required to open and view the PDF. Without it, the document is completely inaccessible. Best for protecting payslips, contracts, invoices, and personal documents you're sharing via email.
Owner Password (Permissions Password)
Controls what users can do with the PDF — like printing, copying text, or editing. The PDF can still be opened without it, but certain actions are restricted. Useful for public documents where you want to prevent copying.
Processed entirely in your browser
Protection is applied using pdf-lib running in your browser. No file is uploaded to any server. The protected PDF downloads directly to your device.
Key Terms
PDF Encryption
The process of scrambling PDF content so it can only be read with the correct password. Uses AES-128 or AES-256 encryption standards.
User Password
Required to open and view the PDF. Without it, the document is completely inaccessible.
Owner Password
Controls permissions like printing, editing, and copying. The PDF can still be opened without it, but certain actions are restricted.