Protect PDF
Add a password and choose what readers are allowed to do.
How to password-protect a PDF
- 1
Select your PDF.
- 2
Enter a password and choose what readers may do, like print or copy.
- 3
Click Protect PDF and download the encrypted file.
Questions and answers
How strong is the protection?
The PDF is encrypted with AES-256, the strongest encryption the PDF format supports.
What if I forget the password?
It can’t be recovered, so keep it somewhere safe.
Is PDFfinch free?
Yes. Every tool is free to use, with no account, no email and no watermark added to your files.
Does it work on my phone?
Yes. PDFfinch works in any modern browser on Windows, Mac, Linux, iPhone and Android. There is nothing to install.