Protect a PDF with a password
Lock a PDF so only people with the password can open it, and decide whether they may print, copy or edit it.
or drop it here
Files stay on your device.
How to password-protect a PDF
- 1Choose the PDF.
- 2Enter a password twice and choose what readers may do.
- 3Click Protect PDF and download the encrypted file.
Why use this tool
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Strong encryption
Files are encrypted with AES-256, the strongest standard PDF encryption, supported by all current readers.
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Control permissions
Allow or block printing, copying, editing and commenting.
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Your password stays secret
Encryption happens on your device, so neither the file nor the password is sent anywhere.
Frequently asked questions
What if I forget the password?
It cannot be recovered — that is the point of encryption. Keep a copy of the password, or of the unprotected file, in a safe place.
Do permission restrictions really work?
Reputable PDF readers respect them, but they are not as strong as the open password. Use the open password to keep content private.
Which apps can open the protected PDF?
All modern PDF readers, including Adobe Acrobat Reader, browsers, macOS Preview and mobile viewers.