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Protect PDF
Add a password so only people you share it with can open the PDF. Uses AES-256, the strongest encryption in the PDF standard.
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How to password-protect a PDF
- Open a PDF.
- Type a password twice.
- Save. The file now asks for the password when opened.
Uses AES-256, the strongest encryption standard in PDF. Your password never leaves this device.
Step-by-step guide with screenshots: How to Password Protect a PDF for Free (Without Acrobat)
Your file is processed on this device. It is never uploaded.
Questions about Protect PDF
How strong is the protection?
AES-256 is very strong, but only as strong as your password. Use a long password that isn't easy to guess.
What if I forget the password?
It can't be recovered – not by us or anyone else. Keep it somewhere safe.
Can I also block copying and printing?
Yes. Tick "Also block copying and editing". Most PDF readers respect this, but it is weaker than the password itself.