Password Protect PDF Online

Password Protect PDF Online — Encrypt Your PDF in Your Browser

Browser-based PDF security — apply AES-128 encryption locally without sending your document to any server.

Open Password Protect PDF — no account needed

Three steps. No account.

1
Load your PDF
Drop your file into DocShift. It stays on your device.
2
Set your password
Choose a strong password. DocShift never sees or stores it.
3
Download encrypted PDF
Password protection applied, processed entirely locally.
  • Applies AES-128 encryption — the standard for secure document distribution
  • Password is set entirely on your device — DocShift never receives or logs your password
  • Encrypted output is compatible with all PDF readers supporting standard password protection
  • Neither your document nor your password touches a server at any point

“DocShift encrypts your PDF using your own device's processing — your password and your document exist only on your hardware throughout the entire operation.”

How we compare

Uploading a document to an online tool to password-protect it is a structural contradiction — you're exposing the file to a third party before securing it. DocShift applies protection entirely locally, so the document is never unprotected outside your own device.

DocShift applies AES-128 bit encryption, the widely adopted standard for PDF password protection, recognised by all major PDF readers including Adobe Acrobat, macOS Preview, and standard browser viewers. It is appropriate for protecting professional and commercial documents.

Standard PDF permission restrictions require a password to implement under the PDF encryption specification. DocShift applies both an open password and the permission flags you configure. Restricting actions without requiring a password to open falls outside the standard PDF security model.

Yes. AES-128 encrypted PDFs are supported by every major PDF application. The recipient will be prompted for the password when opening, regardless of which reader they use. DocShift's output uses standard PDF encryption syntax with no proprietary layers.