Password-protect a PDF

Add a PDF, choose a password, and download a copy that asks for it before it opens. Your PDF and your password stay on your device.

Your files are processed on this device. Nothing is uploaded, and once you’ve added your first file it keeps working in flight mode.

How to password-protect a PDF

Tap "Add a PDF" or drop it onto the box.
Type a password twice, and choose whether people may print it or copy its text.
Tap "Protect PDF", then download. Send the password separately, for example by phone or SMS.

The PDF is locked with AES-256, the strongest encryption the PDF standard offers, so it opens in any PDF app once the right password is typed.

We never see or store your password. That also means nobody can recover a forgotten one, so keep it somewhere safe, along with your original file.

Will it open on any phone or computer?

Yes. Every current PDF app supports this kind of password. Very old PDF readers, from before about 2011, may not.

What if I forget the password?

Nobody can open the PDF without it, not even us. Keep your original, unprotected file somewhere safe.

Is my PDF or password uploaded?

No. The PDF is locked by your browser on your device.

Page last reviewed 21 October 2026.