Password protect a PDF

Lock a PDF so only people with the password can open it. Uses AES-256 encryption, the same standard used by Adobe Acrobat.

Private: your file stays on your device
or drop files here — they stay on your device

How to password protect a PDF

  1. Choose your PDF.
  2. Type a password and confirm it.
  3. Download the protected PDF.

Frequently asked questions

What if I forget the password?

We never see or store your password, so it can’t be recovered. Keep a copy somewhere safe.

How strong is the protection?

PDFCop uses AES-256, the strongest encryption the PDF format supports.

Are my files uploaded to a server?

No. PDFCop works entirely inside your browser. Your files are processed on your own phone or computer and are never sent to us or anyone else.

Is it really free?

Yes. There is no sign-up, no daily limit and no watermark on your file. The site is supported by ads.

Related tools

Unlock PDFRemove a password you knowAdd watermarkStamp text on every pageSign PDFDraw or type your signature