Protect PDF Online
Encrypt a PDF with a password using AES-128 (the PDF standard security handler, revision 4) directly in your browser, with owner/user passwords and print/copy/edit permission flags. Opening the result requires the password in any PDF viewer — the file never leaves your device.
AES-128 password encryption (browser)Owner and user passwords with permission flagsNo upload — files never leave your device
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Frequently Asked Questions
Files are encrypted with AES-128 (PDF standard security handler, revision 4) using the browser's WebCrypto. The output cannot be opened without the password, in any mainstream PDF viewer.