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Password-protect a PDF

Lock your PDF with password encryption.

Files stay on your device

Drop your PDF here, or click to choose

Files are processed on your device — nothing is uploaded.

Choose file

How to password-protect a PDF

  1. Drop the PDF you want to lock — or click to choose it.
  2. Enter a password (and confirm it). Optionally restrict printing, copying, or editing.
  3. Click Process and download your encrypted PDF.

Your file and password never leave your device — AES-256 encryption runs entirely in your browser.

Frequently asked questions

How strong is the encryption? This tool uses AES-256, the standard for strong PDF encryption. Anyone opening the file will need the password you set.

Do you upload my files or store my password? No. Everything happens locally in your browser — there's no server to send your file or password to.