Safeguard sensitive PDF documents with secure password encryption and granular permission restrictions—computed locally inside your browser.
Follow these simple steps to process your document privately in seconds.
Load the file you wish to encrypt into the PDF Studio workspace.
Choose 'Protect with Password' from the Security menu and enter your desired password and permissions.
Export your encrypted PDF. The document will now require your password to open in any reader.
Set a secure user open password that must be entered to view and decrypt the PDF document.
Restrict unauthorized users from printing, copying text, modifying content, or extracting pages.
Strip hidden document metadata, author tags, creation software details, and revision history.
Your encryption key and document are calculated directly in local memory. Passwords are never sent across the internet.
Protected documents open reliably in standard PDF viewers including Adobe Reader, Chrome, Edge, and Preview.
Encrypt as many confidential files, bank records, and legal briefs as you need without cost.
Your PDF is processed directly on your computer using WebAssembly and HTML5 Canvas technology. At no point during viewing, editing, or exporting is your file transmitted to external servers. Review our Security Architecture or read our verified Privacy Policy.
No. Because encryption is performed locally using mathematical algorithms with zero server logging, only the person who knows the password can unlock the file.
Yes, PDF Studio generates standard-compliant encrypted PDFs that prompt for passwords in any standard PDF reader.
Instant browser workspace. No registration, no watermarks, and 100% private.
Launch PDF Studio