7-day free trial · then $5.99/month for all 16 tools
Password Protect PDF Online — Encrypt Your Documents
Add password protection and encryption to your PDF, and control whether it can be printed or copied.
Files never leave your device No installation
Keep sensitive documents away from prying eyes by encrypting them with a password. PDF Suite Pro applies standard PDF encryption so the file can only be opened by someone who knows the password — in any PDF reader, on any platform.
You can also set permissions that restrict printing and copying. And because encryption is applied locally in your browser, neither your document nor your chosen password is ever transmitted anywhere.
Password encryption
Industry-standard PDF encryption that every major reader understands.
Print & copy control
Optionally block printing and text copying for extra control.
Works everywhere
Protected files open (with the password) in Adobe Reader, Preview, browsers and phones.
Zero exposure
File and password stay in your browser — nothing is uploaded.
How to use the Protect PDF tool
- 1
Drop in the PDF you want to protect.
- 2
Choose a strong password.
- 3
Optionally restrict printing and copying.
- 4
Download the encrypted PDF and share it safely.
Frequently asked questions
How do I put a password on a PDF?
Open the Protect tool, drop in your PDF, type the password you want, and download the encrypted copy. Anyone opening it will be asked for that password.
Can the password be recovered if I forget it?
No — encryption is designed so the file cannot be opened without the password. Store it somewhere safe, like a password manager.
Is my password sent to your servers?
Never. Encryption happens entirely in your browser; neither the document nor the password leaves your device.
Try Protect PDF free for 7 days
One plan unlocks all 16 PDF tools plus 1 GB of cloud storage. $5.99/month after the trial — cancel anytime.
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