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Password-protect a PDF without uploading

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

Do I have to upload my PDF to password-protect it?
No. Encryption happens entirely in your browser — your file and password are processed locally and never leave your device.
What do the permission toggles do?
They control whether someone who can open the PDF may print it, copy its text, or edit it. Turn one off to restrict it; the open password stays required either way.
How strong is the encryption?
It uses AES-256, the same standard trusted for sensitive documents — and because it runs on your device, your password is never transmitted anywhere.
Is password-protecting a PDF free?
Yes. It's completely free, with no account, no sign-up, and no watermarks.