Password Protect PDF Online Free

An Open (User) Password is required to open and view the document content. A Permissions (Owner) Password restricts specific actions—such as printing, copying text, or editing pages—while allowing the document to be read without a password.

Docgin applies military-grade 256-bit AES (Advanced Encryption Standard) encryption, the industry gold standard recognized by ISO 32000 and the U.S. National Institute of Standards and Technology (NIST).

Yes. By setting a Permissions Password, you can granularly disallow high-resolution printing, block text and graphics extraction (clipboard copy), and prohibit form editing or page extraction.

Yes. 256-bit AES encrypted PDFs are 100% compliant with standard PDF specifications and open seamlessly in Adobe Acrobat Reader, Apple Preview, Google Chrome, Microsoft Edge, and mobile viewers.

No. 256-bit AES encryption is mathematically infeasible to crack through brute-force methods. Without the exact passphrase, document contents remain securely scrambled.

Upload the document, enter a robust password (combining letters, numbers, and symbols), click 'Encrypt PDF', and share the password through a secure out-of-band channel (such as an encrypted text message).

No. Encryption only scrambles the binary streams within the PDF dictionary. Visual layout, vector sharpness, image clarity, and bookmarks remain entirely intact, with negligible change in file size.

Yes. You can use our companion tools or standard PDF software: simply open the file using your password and export/re-save the document without security enabled.

Because 256-bit AES encryption does not contain any backdoors, forgotten passwords cannot be recovered by Docgin or anyone else. Keep a secure backup of your passphrase.

Never. Passwords and documents are processed in ephemeral memory sandboxes and never written to permanent disk or audit logs. Your confidentiality is guaranteed.